University of Calgary

UofC Navigation

Chemical and Petroleum Engineering

Position:

Professor

Phone:

(403) 220-7825

Address:

CCIT 212

E-mail:

NSERC/AERI/Foundation CMG Chair In Reservoir Simulation

iCORE Industrial Chair in Reservoir Modeling

Director, iCentre Simulation & Visualization

- 2007--: Professor and Foundation CMG Chair, University of Calgary
- 2001 --2006: Professor, Southern Methodist University
- 2000 --2006: Director, Center for Scientific Computation, Southern Methodist University
- 2000 -- 2005: Director, Graduate Program in Mathematics, Southern Methodist University
- 1999 -- 2000: Visiting Associate Professor, Texas A&M University
- 1999 -- 2000: Visiting Research Scientist, The Mobil Technology Company
- 1998 -- 2000: Associate Professor, Southern Methodist University
- 1995 -- 1998: Assistant Professor, Southern Methodist University
- 1993 -- 1995: Visiting Assistant Professor, Texas A&M University
- 1991 -- 1993: Postdoctoral Research Associate, University of Minnesota
- 1986 -- 1991: Research Fellow and Teaching Assistant, Purdue University
- 1985 -- 1986: Assistant Professor, Xi'an Jiaotong University

**The Second International Conference on Bifurcation Theory and its Numerical Analysis,**June 29--July 3, 1998, Xi'an Jiaotong University, Xi'an, China. Also see the book: Bifurcation Theory and its Numerical Analysis, Springer-Verlag, Singapore, 1999, edited by Z. Chen, Shui-Nee Chow, and Kaitai Li**International Workshop on Computational Physics: Fluid Flow and Transport in Porous Media,**August 2--6, 1999, International Center of Computational Physics, Beijing, China. Also see the book: Numerical Treatment of Multiphase Flows in Porous Media, Lecture Notes in Physics, Vol. 552, 2000, Springer-Verlag, Heidelberg, edited by Z. Chen, Richard E. Ewing, and Zhong-Ci Shi (http://www.springer.de/cgi-bin/search_book.pl?isbn=3-540-67566-3)- 2001 Texas Finite Element Rodeo, The next meeting will be held March 2 and 3, 2001 at Southern Methodist University, Dallas, Texas. Z. Chen
- Joint Summer Research Conference: Fluid Flow and Transport in Porous Media: Mathematical and Numerical Treatment, by the American Mathematical Society (AMS), the Institute of Mathematical Sciences (IMS), and the Society for Industrial and Applied Mathematics (SIAM). June 16--22, 2001, Mount Holyoke College in South Hadley, Massachusetts, USA Also see the book: Fluid Flows and Transport in Porous Media: Mathematical and Numerical Treatment, Z. Chen and Richard E. Ewing, eds., Contemporary Mathematics, Volume 295, American Mathematical Society, 2002. Organizing Committee: Zhangxin Chen (co-chair), Richard E. Ewing, (co-chair), Jose Lage, and Raytcho Lazarov. (http://www.ams.org/bookstore?fn=20&arg1=conmseries&item=CONM-295)
- Workshop on Finite Elements and Their Applications in Industry,
- Summer School on Various Finite Elements, Their Linear Solvers and Their Applications, August 1--13, 2002, Xi'an Jiaotong University, Xi'an, China Z. Chen
- ICM2002-Beijing Satellite Conference on Scientific Computing, Aug. 15--Aug. 18, 2002, Xi'an Jiaotong University, Xi'an, China Z. Chen
- Chinese Association for Science and Technology, Texas Chapter, USA,
- The Annual Convention of the Chinese Association for Science and Technology in Texas, USA, Dallas, Texas, March 2004. Z. Chen
- The China-US Conference on Business, Technology, and Education: Opportunities and Challenges in Globalization, Dallas, Texas, USA, March 13--14, 2004. Z. Chen
- Scientific Computing in Petroleum Industry,
- High Performance Computing and Applications, Shanghai University, Shanghai, China, August 8--10, 2004. Z. Chen, W. Zhang, and W. Tong.
- The Annual Texas Finite Element Rodeo, Southern Methodist University, Southern Methodist University, Dallas, Texas, March 2005. Z. Chen, B. Ayati, P. Moore, and J. Tausch.
- Integrated Environmental Modeling Workshop in Texas,
- Symposium on Mathematics Education Reform, Beijing, China, March 20--22, 2006. Z. Chen, Qun Lin and Xiaoping Shen (http://www.math.ohiou.edu/~shen/calculus/calculus3.html)
- International Workshop on Numerical Methods for Partial Differential Equations, Xi'an Jiaotong University, Xi'an, China, July 19--26, 2006. Z. Chen
- Computational Methods in Energy and Environmental Research, Friendship Hotel in Beijing, China, July 9--12, 2007, Z. Chen, co-organizing with G. Qin, D. Zhang, et al.
- International Workshop on Computational Methods and Applications in Geoscience,

- Numerical Methods for Partial Differential Equations, 2009--.
- Journal of Canadian Petroleum Technology, 2008--.
- Advances in Numerical Analysis, 2008--.
- The Book Series Editor, Computational Mathematics, World Scientific Publishing Co. Pte. Ltd., 2006--.
- Networks and Heterogeneous Media, 2005--.
- Journal of Korean SIAM, 2004--.
- Int. J. Numerical Analysis and Modeling, 2003--.
- Journal of Numerical Mathematics (formerly East-West Journal of Numerical Mathematics), 2001--.
- International Biographical Centre of Cambridge, Cambridge, England, 2000--.
- American Biographical Institute's Research Board of Advisors, 1999--.

**175. Overview of wellbore fluid flow and heat transfer modeling with Applications in the Oil Industry, ** Journal of Exploration and Production: Oil and Gas Review 7 (2009), to appear.

Z. Chen M. Bahonar, and J. Azaiez

**174. Stability and convergence of a stabilized finite volume method for the transient Navier-Stokes equations, ** submitted for publication.

Z. Chen and J. Li

**173. A semi-unsteady state wellbore steam/water flow model for prediction of sandface conditions in steam injection wells, Paper 2009-005, ** the Canadian International Petroleum Conference Proceedings, Calgary, Alberta, Canada, June 16--18, 2009; Journal of Exploration and Production: Oil and Gas Review 7 (2009), to appear.

Z. Chen M. Bahonar, and J. Azaiez

**172. A new approach to simulation of the boundary layer in the vapor extraction process, Paper 2009-092, ** the Canadian International Petroleum Conference Proceedings, Calgary, Alberta, Canada, June 16--18, 2009.

Z. Chen H. Nourozieh, M. Kariznovi, and J. Abedi

**171. Modelling of bitumen ultradispersed catalytic upgrading experiments in a batch reactor, Paper 2009-158, ** the Canadian International Petroleum Conference Proceedings, Calgary, Alberta, Canada, June 16--18, 2009.

Z. Chen H. Hassanzadeh, C. E. Galarraga, J. Abedi, C. E. Scott, and P. Pereira-Almao

**170. Simulation study of underground coal gasification in deep coal seams, Paper 602, ** the 8th World Congress of Chemical Engineering, Montreal, Canada, August 23--27, 2009; Journal of Energy and Fuel, to appear.

Z. Chen H. Nourozieh, M. Kariznovi, and J. Abedi

**169. Estimation of kinetic constants for in situ ultra-dispersed catalytic upgrading of bitumen in a batch reactor, Paper 2256, ** the 8th World Congress of Chemical Engineering, Montreal, Canada, August 23--27, 2009.

Z. Chen H. Hassanzadeh, C. E. Galarraga, J. Abedi, C. E. Scott, and P. Pereira-Almao

**168. Analysis of the pressure projection stabilization method for second-order elliptic problems, ** submitted for publication.

Z. Chen Z. Wang, and J. Li

**167. Convergence and stability of a stabilized finite volume method for the stationary Navier-Stokes equations, ** submitted for publication.

Z. Chen J. Li, and L. Shen

**166. A new local stabilized nonconforming finite element method for the stationary Navier-Stokes equations, ** submitted for publication.

Z. Chen L. Zhu, and J. Li

**165. Integrated reservoir simulation and basin models: Reservoir charging and fluid mixing, **SPE 118833, 2009 SPE Reservoir Simulation Symposium held in The Woodlands, Texas, USA, 2-4 February 2009.

Z. Chen H. Chen, D. Carruthers, and J. Zhou

**164. Pricing and risk management of variable annuities and equity-indexed annuities, **Research and Finance, to appear.

Z. Chen ,G. Cao, and A. Chen

**163. Performance of several stabilized finite element methods for the Stokes equations based on the lowest equal-order pairs, **Computing, 86 (2009), 37--51

Z. Chen ,J. Li, and Y. He

**162. Analysis of a stabilized finite volume method for the transient Stokes equations, **International Journal of Numerical Analysis and Modeling, 6 (2009), 505--519.

Z. Chen ,L. Shen, and J. Li

**161. A sequence of Cipher producing methods based on a two-layer ranking multi-objective evolutionary algorithm, **Proceedings of the IEEE Congress on Evolutionary Computation 2008 (CEC 2008), Hong Kong, 2008, 169--173.

Z. Chen ,K. Li, W. Pan, and Zhang

**160. Automatic modeling of a novel gene expression programming based on statistical analysis and critical velocity, **The proceedings of the 2008 IEEE Congress on Evolutionary Computation (IEEE CEC 2008) within 2008 IEEE World Congress on Computational Intelligence (WCCI 2008), 641--647, Hong Kong.

Z. Chen ,W. Pan, S. Li, and W. Zhang

**159. Numerical Simulation of Reservoir Multicomponent Fluid Mixing, **submitted for publication.

Z. Chen, and H. Chen

**158****. Reliable and efficient error control for an adaptive Galerkin-characteristic method for convection-dominated diffusion problems, **submitted for publication.

Z. Chen, M. Cui, H. Chen, R.E. Ewing, and G. Qin

**157. Do fluid compositions and reservoir pressure tell us the same thing about reservoir segmentation? **2007 International Petroleum Technology Conference December 3-6th, Dubai, UAE, Paper Poster.

Z. Chen, C. Gong, H. Luo, J. Bunney, T. Barwise, M. Osborne, H. Chen, D. Caruthers, and G. Zhou

**156. A new local stabilized nonconforming finite element method for the Stokes equations,** Computing, 82 (2008), 157--170.

Z. Chen, and J. Li

**155****. A bionics evolutionary algorithm based on average vector deviation, **The Proceedings of the 4th International Conference on Fuzzy Systems and Knowledge Discovery (FSKD'07), IEEE, 2007, 386--390.

Z. Chen, K. Li, W. Pan, and H. Luo

**154. On the heterogeneous multiscale method with various macroscopic solvers, ** Nonlinear Analysis Series A: Theory, Methods & Applications, 71 (2009), 3267--3282.

Z. Chen

**153. The multiscale finite element method with nonconforming elements for elliptic homogenization problems, **SIAM Multiscale Modeling and Simulation 7 (2008), 517-538.

Z. Chen, M. Cui, T. Savchuk, and X. Yu

**152. Development, analysis and numerical tests of a compositional reservoir simulator, **International Journal of Numerical Analysis and Modeling, 5 (2008), 86--100.

Z. Chen, Y. Zhang

**151. A new stabilized finite element method for the transient Navier-Stokes equations, **Computer Methods in Applied Mechanics and Engineering 197 (2007), 22—35 (the first class of research article award by the Society of Chinese Mathematics, 2008).

Z. Chen, J. Li and Y. He

**150. A new stabilized finite volume method for the stationary Stokes equations, **Advances in Computational Mathematics, 30 (2009), 141--152.

Z. Chen and J. Li

**149. Critical review of the impact of tortuosity on diffusion, **Chemical Engineering Science, 62 (2007), 3748--3755.

Z. Chen and L. Shen

**148. A particle gradient evolutionary algorithm for solving multi-objective problems, **Applied Mathematics and Computation, 187 (2007), 1173--1186.

Z. Chen , K. Li, X. Yue, and L. Kang

**147. A particle gradient evolutionary algorithm based on statistical mechanics and convergence analysis, **The Proceedings of 7th International Conference on High Performance Computing in Computational Sciences (VECPAR 2006), Lecture Notes in Computer Science Series (LNCS), Springer-Verlag, 2007, 530--543.

Z. Chen, K. Li, W. Li, and Z. Wu

**146. Analysis of the multiscale finite element method for nonlinear and random homogenization problems, **SIAM J. Numer. Anal. 46 (2008), 260--279.

Z. Chen and T. Savchuk

**145. A penalty finite volume method for the transient Navier-Stokes equations, **Applied Numerical Mathematics 58 (2008), 1583--1613.

Z. Chen, G. He and Y. He

**144. A multi-objective dynamical evolutionary algorithm based on transportation theory, **The Proceedings of International Genetic and Evolutionary Computation Conference (GECCO2006), July 8-12, 2006, Seattle, WA, USA.

Z. Chen, K. Li, X. Yue, and L. Kang

**143. Heavy oils, Part II, **SIAM News, Vol. 39/Number 4, May 2006, pages 5 and 8.

Z. Chen

**142. Heavy oils, Part I, **SIAM News, Vol. 39/Number 3, April 2006, pages 1 and 8.

Z. Chen

**141. Characteristic-mixed covolume methods for advection-dominated diffusion problems, **Numerical Linear Algebra with Application, 13 (2006), 677--697.

Z. Chen S.-H. Chou and D. Y. Kwak

**140. A survey of wormhole research in cold heavy oil production, **submitted for publication.

Z. Chen and R. Wang

**139. Numerical simulation of compositional flow in porous media under gravity, **Communications in Computational Physics, 1 (2006), 827-846.

Z. Chen, G. Zhou and D. Carruthers

**138. Implementation of mixed methods as finite difference methods and applications to nonisothermal multiphase flow in porous media, **Journal of Computational Mathematics, 24 (2006), 281--294.

Z. Chen, and X. Yu

**137****. Well flow models for various numerical methods, **International Journal of Numerical Analysis and Modeling, 6 (2009), 375--388.

Z. Chen and Y. Zhang

**136. Performance of drainage experiments with Orinoco Belt Heavy Oil in a long laboratory core in imitated reservoir conditions, **SPE Journal, December (2008), 474--479.

Z. Chen, R. Wang, J. Qin, and M. Zhao

**135. The control volume finite element methods and their applications to multiphase flow, **Networks and Heterogeneous Media, 1 (2006), 689--706.

Z. Chen

**134. A new algorithm of evolving artificial neural networks via gene expression programming, **Journal of the Korean Society for Industrial and Applied Mathematics, 9 (2005), 83--89.

Z. Chen K. Li, Y. Li, and H. Mo

**133. Homogenization and simulation for compositional flow in naturally fractured reservoirs, **Journal of Mathematical Analysis and Applications, 329 (2007), 12--32.

Z. Chen

**132. Numerical simulation for fractured porous media, **High Performance Computing and Applications 2004, Lecture Notes in Computational Science and Engineering, Z. Chen, et al., eds., Springer-Verlag, Heidelberg, 2005, 47--58.

Z. Chen, G. Huan, R. E. Ewing, and G. Qin

**131. An application of genetic programming to economic forecasting, **High Performance Computing and Applications 2004, Lecture Notes in Computational Science and Engineering, Z. Chen, et al., eds., Springer-Verlag, Heidelberg, 2005, 71--80.

Z. Chen, K. Li, Y. Li, and A. Zhou

**130. A new dynamical evolutionary algorithm based on particle transportation theory, **to appear in High Performance Computing and Applications 2004, Lecture Notes in Computational Science and Engineering, Z. Chen, et al., eds., Springer-Verlag, Heidelberg, 2005, 81--92.

Z. Chen K. Li, Y. Li, and Z. Wu

**129. Numerical simulation of nonisothermal multiphase multicomponent flow in porous media, **to appear in the proceedings of the Conference on Analysis, Modeling and Computation of PDEs and Multiphase Flow in Celebration of James Glimm's 70th Birthday, SUNY at Stony Brook, New York, August 3--5, 2004.

Z. Chen and Y. Ma

**128. Computer simulation of gas cycling of retrograde condensate reservoirs using an unstructured CVFE compositional model, **Computing, 78 (2006), 31--53.

Z. Chen, G. Huan, and H. Wang

**127. A sequential numerical chemical compositional simulator, **Transport in Porous Media, 68 (2007), 389--411.

Z. Chen, Y. Ma, and G. Chen

**126. Comparison of the GMRES and ORTHOMIN for the black oil model on unstructured grids, **International Journal for Numerical Methods in Fluids, 52 (2006), 941--962.

Z. Chen, W. Li, G. Huan, and X. Sun

**125. Reservoir simulation, **Bul. Soc. Esp. Mat. Apl. 37 (2006), 67--88.

Z. Chen

**124. Parallel computation for reservoir thermal simulation of multicomponent and multiphase fluid flow, **Journal of Computational Physics 201 (2004), 224-237.

Z. Chen and Y. Ma

**123. Multiscale methods for elliptic homogenization problems, **Numerical Methods for Partial Differential Equations, 22 (2006), 317--360.

Z. Chen

**122. Numerical analysis of a modified finite element nonlinear Galerkin method, **Numer. Math. 97 (2004), 725--756.

Z. Chen, Y. He, H. Miao, and R. M. M. Mattheij

**121. Simulation of a compositional model for multiphase flow in porous media, **Numerical Methods for PDEs, 21 (2004), 726--741.

Z. Chen, G. Huan and H. Wang

**120. Comparison of the GMRES and ORTHOMIN for the black oil model in porous media, **International Journal for Numerical Methods in Fluids, 48 (2005), 501--519.

Z. Chen, W. Li, R. Ewing, G. Huan, and B. Li

**119. Distributed parallel solver for multiphase flow in porous media, **Applied Parallel and Distributed Computing, Advances in Computation: Theory and Practice, vol. 16, Y. Pan and L. Yang, eds., Nova Science Publishers, 2005, 169--183.

Z. Chen, W. Li and G. Huan

**118. An optimal nonlinear Galerkin method with mixed finite elements for the steady Navier-Stokes equations, **Numerical Methods for Partial Differential Equations 19 (2003), 762--775.

Z. Chen, Y. He, A. Wang, and K. Li

**117. A mathematical model for ESP simulation, **Current Trends in Scientific Computing, Contemporary Mathematics, Vol. 329, Z. Chen, R. Glowinski, and K. Li, eds., American Mathematical Society, 2003, 315--324.

Z. Chen, R. Wang

**116. Characteristic-nonconforming finite element methods for advection-dominated diffusion problems, **A special issue of Computers and Mathematics with Applications in memory of Professor George Fix , 48 (2004), 1087--1100.

Z. Chen,

**115. Scientific computing in energy and environment, **Current Trends in Scientific Computing, Contemporary Mathematics, Vol. 329, Z. Chen, R. Glowinski, and K. Li, eds., American Mathematical Society, 2003, 51--58.

Z. Chen, R. Glowinski, and J. He

**114. Pointwise error estimates of discontinuous Galerkin methods with penalty for second-Order elliptic problems, **SIAM J. Numer. Anal. 24 (2004), 1146--1166.

Z. Chen, and H. Chen

**113****. Modeling horizontal wells with the CVFA method in black oil reservoir simulations, **Current Trends in Scientific Computing, Contemporary Mathematics, Vol. 329, Z. Chen, R. Glowinski, and K. Li, eds., American Mathematical Society, 2003, 209--236.

Z. Chen, B. Li, and G. Huan

**112. Comparison of solution schemes for black oil reservoir simulations with unstructured grids, **Computer Methods in Applied Mechanics and Engineering, 193 (2004), 319--355.

Z. Chen, B. Li and G. Huan

**111. Parallel computing in the black oil model, **Current Trends in Scientific Computing, Contemporary Mathematics, Vol. 329, Z. Chen, R. Glowinski, and K. Li, eds., American Mathematical Society, 2003, 253--262.

Z. Chen, J. Liu, R.E. Ewing, G. Huan, B. Li, and Z. Wang

**110. Numerical analysis for two-phase flow in porous media, **Computational Methods in Applied Mathematics, 3 (2003), 59--75.

Z. Chen

**109. Control volume function approximation methods and their applications to modeling porous media flow II: The black oil model, **Advances in Water Resources, 27 (2004), 99--120.

Z. Chen, B. Li and G. Huan

**108. The sequential method for the black oil model on unstructured grids, **Journal of Computational Physics, 192 (2003), 36--72.

Z. Chen, B. Li and G. Huan

**107. Control volume function approximation method for the black oil model, **Proceedings of the 2nd Meeting on Reservoir Simulation, Universidad Argentina de la Empresa, Buenos Aires, Argentina, Nov. 5-6, 2002, CD-ROM.

Z. Chen, G. Huan, B. Li, S. Buitrago, D. Espin, and H. Klie

**106. Comparison of Practical Approaches to Reservoir Simulation, **Proceedings of the 2nd Meeting on Reservoir Simulation, Universidad Argentina de la Empresa, Buenos Aires, Argentina, Nov. 5-6, 2002, CD-ROM.

Z. Chen, G. Huan, B. Li, W. Li, S. Buitrago, D. Espin, and H. Klie

**105. Analysis and numerics for multiphase flow in porous media, **Proceedings of the Second MIT Conference on Computational Fluid and Solid Mechanics, K.~J.~Bathe, Ed., Elsevier Science, 2 (2003), 1285--1286.

Z. Chen

**104. An interactive simulation platform and its industrial applications, **Proceedings of the Second MIT Conference on Computational Fluid and Solid Mechanics, K.~J.~Bathe, Ed., Elsevier Science, 2 (2003), 2241--2243.

Z. Chen

**103. Degenerate two-phase incompressible flow V: Characteristic finite element methods, **Journal of Numerical Mathematics, 10 (2002), 87--107.

Z. Chen, R. Ewing, Q. Jiang, and A. Spagnuolo

**102. A pseudo function approach in reservoir simulation, **International Journal of Numerical Analysis and Modeling, 2 (2005), 58--67.

Z. Chen, G. Huan, and B. Li

**101. Locking-free nonconforming finite elements for planar linear elasticity, **Dynamical Systems and Differential Equations, Supplement Volume (2005), 181--189.

Z. Chen, Y. Cui, and Q. Jiang

**100. Discontinuous finite element methods, Chapter Three, **in the Finite Element Handbook, Z.-C. Shi, et al., eds., World Scientific Publisher, 2002, to appear.

Z. Chen

**99. Nonconforming finite element methods, Chapter Two, **in the Finite Element Handbook, Z.-C. Shi, et al., eds., World Scientific Publisher, 2002, to appear.

Z. Chen

**98. Mixed finite element methods, Chapter One, **in the Finite Element Handbook, Z.-C. Shi, et al., eds., World Scientific Publisher, 2002, to appear.

Z. Chen

**97. Modeling 2D and 3D horizontal wells using CVFA, **Communications in Mathematical Sciences, 1 (2002), 30--44.

Z. Chen, G. Huan and B. Li

**96. A benchmark calculation of 3D horizontal well simulations, **International Journal of Numerical Analysis and Modeling, 1 (2004), 189--202.

Z. Chen, G. Huan and B. Li

**95. An improved IMPES method for two-phase flow in porous media, **Transport in Porous Media 54 (2004), 361--376.

Z. Chen, G. Huan and B. Li

**94. Two-phase immiscible flow with the viscous drag in naturally fractured reservoirs, **Fluid Flows and Transport in Porous Media, Mathematical and Numerical Treatment, Contemporary Mathematics, Vol. 295, Z. Chen and R. Ewing, eds., AMS, 2001, 127--140.

Z. Chen, Y. Cui and Q. Jiang

**93. Applications of the control volume function approximation method to reservoir simulations, **Fluid Flows and Transport in Porous Media, Mathematical and Numerical Treatment, Contemporary Mathematics, Vol. 295, Z. Chen and R. Ewing, eds., AMS, 2001, 279--292.

Z. Chen, G. Huan and B. Li

**92. Mixed discontinuous FE methods and their applications to two-phase flow in porous media, **Fluid Flows and Transport in Porous Media, Mathematical and Numerical Treatment, Contemporary Mathematics, Vol. 295, Z. Chen and R. Ewing, eds., AMS, 2001, 113--126.

Z. Chen, H. Chen, G. Huan, and Z. Wang

**91. Mixed finite element methods for multiphase flow in petroleum reservoirs with multiple wells, **Fluid Flows and Transport in Porous Media, Mathematical and Numerical Treatment, Contemporary Mathematics, Vol. 295, Z. Chen and R. Ewing, eds., AMS, 2001, 141--152.

Z. Chen, G. Huan and B. Li

**90. Modeling horizontal wells using hybrid grids in reservoir simulations, **Fluid Flows and Transport in Porous Media, Mathematical and Numerical Treatment, Contemporary Mathematics, Vol. 295, Z. Chen and R. Ewing, eds., AMS, 2001, 327--342.

Z. Chen, G. Huan and B. Li

**89. Control volume function approximation methods and their applications to modeling porous media flow I: The two-phase flow, **Advances in Water Resources 26 (2003), 435--444.

Z. Chen, B. Li and G. Huan

**88. The hp version of Eulerian-Lagrangian mixed discontinuous finite element methods for advection-diffusion problems, **International Journal of Mathematics and Mathematical Sciences, 53 (2003), 3385--3411.

Z. Chen, H. Chen, and B. Li

**87. Numerical experiments with various formulations for two phase flow in petroleum reservoirs, **Transport in Porous Media 51 (2003), 89--102.

Z. Chen, and G. Huan

**86** **. Mixed discontinuous finite element methods for multiphase flow in porous media, **Computing Letters 2 (2006), 1--13.

Z. Chen, H. Chen, and G. Huan

**85. Relationships among characteristic finite element methods for advection-diffusion problems, **Journal of of the Korean Society for Industrial and Applied Mathematics, 6 (2002), 1--15.

Z. Chen

**84. Integrated two-dimensional modeling of fluid flow and compaction in a sedimentary basin, **Computational Geosciences, 6 (2002), 545--564.

Z. Chen, R. E. Ewing, H. Lu, S. L. Lyons, S. Maliassov, M. B. Ray, and T. Sun

**83. Effects of boundary conditions on a class of mixed discontinuous finite element methods for reaction-diffusion problems, **Communications in Numerical Methods in Engineering 18 (2002), 355--362.

Z. Chen

**82. Degenerate two-phase incompressible flow IV, Local refinement and domain decomposition, **Journal of Scientific Computing, 18 (2003), 329--360.

Z. Chen, R. E. Ewing

**81. Numerical study of the hp version of mixed discontinuous finite element methods for reaction-diffusion problems: the 1D case, **Numerical Methods for PDEs 19 (2003), 525--553.

Z. Chen, H. Chen and B. Li

**80. Stability and convergence of mixed discontinuous finite element methods for second-order differential problems, **Journal of Numerical Mathematics, 11 (2003), 253--287.

Z. Chen, and H. Chen

**79****. Characteristic mixed discontinuous finite element methods for advection-dominated diffusion problems, **Comp. Meth. Appl. Mech. Engrg. 191 (2002), 2509--2538.

Z. Chen

**78. On the relationship of various discontinuous finite element methods for second-Order elliptic equations, **East-West Numer. Math., 9 (2001), 99--122.

Z. Chen

**77. Error analysis for characteristics-based methods for degenerate parabolic problems, **SIAM J. Numer. Anal. 40 (2003), 1491--1515.

Z. Chen, R. E. Ewing, E. Q. Jiang, and A. M. Spagnuolo

**76. Two-phase flow equation with hysteresis, **PDE Coffee Table Book, K. M. Embree and N. Trefethen, eds., Oxford, 2000.

Z. Chen

**75. Numerical simulation of multiphase flow in fractured porous media, **in Lecture Notes in Physics, Chen, Ewing, and Shi, eds., Springer-Verlag, Heidelberg, Vol. 552, 2000, 52--70.

Z. Chen, P. Bastian, R. E. Ewing, R. Helmig, H. Jakobs, and V. Reichenberger

**74. Mathematical and numerical techniques in energy and environmental modeling, **in Lecture Notes in Physics, Vol. 552, Chen, Ewing, and Shi, eds., Springer-Verlag, Heidelberg, 2000, 1--22.

Z. Chen, and R. E. Ewing

**73****. The mechanical behavior of poroelastic media saturated with a Newtonian fluid derived via homogenization, **International Journal of Numerical Analysis and Modeling, 1 (2004), 75--98.

Z. Chen, S. Lyons, and G. Qin

**72. Uniform convergence of Galerkin-multigrid methods for nonconforming finite elements for second order problems with less than full elliptic regularity, **Numerical Methods for PDEs, 18 (2002), 203--217.

Z. Chen

**71. Derivation of the Forchheimer law via homogenization, **Transport in Porous Media, 44 (2001), 325-335.

Z. Chen, S. Lyons, and G. Qin

**70. Numerical experiments for a finite element approximation of two-phase flow in porous media, **The Proceedings of the Second International Conference on Bifurcation Theory and its Numerical Analysis, Z. Chen, S.-N. Chow, and K. Li, eds., Springer-Verlag, Singapore, 1999, 41--56.

Z. Chen, and N. L. Khlopina

**69** **. Degenerate two-phase incompressible flow III: Sharp error estimates, **Numer. Math. 90 (2001), 215-240.

Z. Chen and R. E. Ewing

**68. Degenerate two-phase incompressible flow II: Regularity, stability and stabilization, **J. Diff. Equations, 186 (2002), 345--376.

Z. Chen,

**67. Degenerate two-phase incompressible flow I: Existence, uniqueness and regularity of a weak solution, **J. Diff. Equations, 171 (2001), 203--232.

Z. Chen

**66. Some problems in mathematical modeling and simulation for applications of fluid flows in porous media, **The Proceedings of the Second International Conference on Bifurcation Theory and its Numerical Analysis, Z. Chen, S.-N. Chow, and K. Li, eds., Springer-Verlag, Singapore, 1999, 28--40.

Z. Chen

**65. Degenerate two-phase incompressible flow problems III: Perturbation analysis and numerical experiments, **Electronic Journal of Differential Equations, 2 (1999), 29--46.

Z. Chen and N. L. Khlopina

**64. Degenerate two-phase incompressible flow problems II: Error estimates, **Comm. Appl. Anal., 5 (2001), 503--521.

Z. Chen and N. L. Khlopina

**63. Degenerate two-phase incompressible flow problems I: Regularization and numerical results, **Comm. Appl. Anal., 5 (2001), 319--334.

Z. Chen and N. L. Khlopina

**62. Convergence of multigrid methods for the Wilson nonconforming finite element, **East-West J. Numer. Math., 7 (1999), 13--22.

Z. Chen and Z.-C. Shi

**61. Schwarz algorithms for nonconforming and mixed methods for second-order problems, **The Proceedings of the Ninth International Colloquium on Differential Equations, D. Bainov, ed., Plovdiv, Bulgaria, 1999, 77--84.

Z. Chen

**60. Local mesh refinement for degenerate two-phase incompressible flow problems, **The Proceedings of the Ninth International Colloquium on Differential Equations, D. Bainov, ed., Plovdiv, Bulgaria, 1999, 85--90.

Z. Chen and R. E. Ewing

**59. Analysis of a compositional model for fluid flow in porous media, **SIAM J. Appl. Math., 60 (2000), 747--777.

Z. Chen, G. Qin, and R. E. Ewing

**58. V-cycle Galerkin-multigrid methods for nonconforming methods for nonsymmetric and indefinite problems, **Applied Numerical Mathematics, 28 (1998), 17--35.

Z. Chen and D. Y. Kwak

**57. Analysis of large-scale averaged models for two-phase flow in fractured reservoirs, **Journal of Mathematical Analysis and Applications, 223 (1998), 158--181.

Z. Chen

**56. On the convergence of nonnested multigrid methods with nested spaces on coarse grids, **Numerical Methods for Partial Differential Equations, 16 (2000), 265--284.

Z. Chen

**55. Mathematical analysis for reservoir models, **SIAM J. Math. Anal., 30 (1999), 431--453.

Z. Chen and R. Ewing

**54. On the convergence of Galerkin-multigrid methods for nonconforming finite elements, **East-West J. Numer. Math., 7 (1999), 79--107.

Z. Chen

**53. Convergence of multigrid methods for nonconforming finite elements without regularity assumptions, **Comp. Appl. Math., 17 (1998), 283--302.

Z. Chen and Do Y. Kwak

**52. Formulations and numerical methods of the black-oil model in porous media, **SIAM J. Numer. Anal., 38 (2000), 489--514.

Z. Chen

**51. Expanded hybrid formulations for numerical solution of plate bending problems, **Iterative Methods in Scientific Computation, J. Wang, et al., eds., IMACS Series in Computational and Applied Mathematics, 4 (1998), 267--273.

Z. Chen

**50. Numerical methods for three models of compositional flow in porous media, **Iterative Methods in Scientific Computation, J. Wang, et al., eds., IMACS Series in Computational and Applied Mathematics, 4 (1998), 85--90.

Z. Chen and Richard E. Ewing

**49. Analysis of expanded mixed methods for fourth order elliptic problems, **Numer. Methods for PDES, 13 (1997), 483--503.

Z. Chen

**48. The analysis of intergrid transfer operators and multigrid methods for nonconforming finite elements, **Electronic Transactions on Numerical Analysis, 5 (1997), 78--96.

Z. Chen

**47. Comparison of various formulations of three-phase flow in porous media, **J. Comp. Physics, 132 (1997), 362--373.

Z. Chen and Richard E. Ewing

**46. From single-phase to compositional flow: applicability of mixed finite elements, **Transport in Porous Media, 27 (1997), 225--242.

Z. Chen and Richard E. Ewing

**45. Multigrid and multilevel methods for nonconforming rotated Q1 elements, **Math. Comp., 67 (1998), 667--693.

Z. Chen and Peter Oswald

**44. Multigrid algorithms for nonconforming and mixed methods for nonsymmetric and indefinite problems, **SIAM J. Scientific Computing, 19 (1998), 502--515.

Z. Chen , Do Y. Kwak and Yoon J. Yon

**43. Expanded mixed finite element methods for linear second order elliptic problems I, **RAIRO Model. Math. Anal. Numer., 32 (1998), 479--499.

Z. Chen

**42. Expanded mixed finite element methods for quasilinear second order elliptic problems II, **RAIRO Model. Math. Anal. Numer., 32 (1998), 500--520.

Z. Chen

**41. Fully-discrete finite element analysis of multiphase flow in groundwater hydrology, **SIAM J. Numer. Anal., 34 (1997), 2228--2253.

Z. Chen and Richard E. Ewing

**40. Stability and convergence of a finite element method for reactive transport in ground water, **SIAM J. Numer. Anal., 34 (1997), 881--904.

Z. Chen and Richard E. Ewing

**39. Domain decomposition methods and multilevel preconditioners for nonconforming and mixed methods for partial differential problems, **Domain Decomposition Methods in Sciences and Engineering, R. Glowinski, et al., eds., Wiley-Interscience-Europe, 213--220, 1997.

Z. Chen and Richard E. Ewing

**38. Recent development of multigrid algorithms for mixed and nonconforming methods for second order elliptic problems, **Proceedings of Seventh Copper Mountain Conference on Multigrid Methods, N. Melson et al., eds., NASA Conference Publication 3339, Part 1, 183--197, 1996.

Z. Chen and Richard E. Ewing

**37. Multilevel preconditioners for mixed methods for second order elliptic problems, **J. Numerical Linear Algebra and Applications, 3 (1996), 427--453.

Z. Chen , Richard E. Ewing, Yuri Kuznetsov, Raytcho Lazarov and Serguei Maliassov

**36. Formulation of three-phase flow in porous media, **Computational Methods in Water Resources, Vol.~1, A. Aldama, et al., eds., Computational Mechanics Publications, Southampton, UK, 1996, 433--440.

Z. Chen

**35. Domain decomposition algorithms for mixed methods for second order elliptic problems, **Math. Comp., 65 (1996), 467--490.

Z. Chen , Richard E. Ewing and Raytcho Lazarov

**34. Equivalence between and multigrid algorithms for nonconforming and mixed methods for second order elliptic problems, **East-West J. Numer. Math., 4 (1996), 1--33.

Z. Chen

**33. Superconvergence results for Galerkin methods for wave propagation in various porous media, **Numerical Methods for Partial Differential Equations, 12 (1996), 99--122.

Z. Chen

**32. A finite element method for the quantum hydrodynamic model for semiconductor devices, **Computers Math. Applic., 31 (1996), 17--26.

Z. Chen

**31. Large-scale averaging analysis of multiphase flow in fractured reservoirs, **Transport in Porous Media, 21 (1995), 269--295.

Z. Chen

**30. Continuous-time finite element analysis of multiphase flow in groundwater hydrology, **Applications of Mathematics, 40 (1995), 203--226.

Z. Chen , Magne Espedal and R. Ewing

**29. On the implementation of mixed methods as nonconforming methods for second order elliptic problems, **Math. Comp., 64 (1995), 943--972.

Z. Chen and Todd Arbogast

**28. Analysis of a finite element method for the drift diffusion semiconductor device equations: the multidimensional case, **Numer. Math., 71 (1995), 1--28.

Z. Chen and Bernardo Cockburn

**27. Quantum hydrodynamic simulation of hysteresis in the resonant tunneling diode, **J. of Comp. Physics, 117 (1995), 274--280.

Z. Chen , Bernardo Cockburn, Carl Gardner and Joseph W. Jerome

**26. Mixed-RKDG finite element methods for the {\rm 2}-D hydrodynamic model for semiconductor device simulation, **VLSI Designs, 3 (1995), 145--158.

Z. Chen , Bernardo Cockburn, Joseph W. Jerome and Chiwang Shu

**25. Finite element analysis of the one-dimensional full drift-diffusion model, **SIAM J. Numer. Anal., 32 (1995), 455--483.

Z. Chen

**24. Numerical simulation of multiphase flow in groundwater hydrology, **Finite Element Modeling of Environmental Problems, Surface and Subsurface Flow and Transport, G. Carey, ed., John Wiley & Sons, 1995, 361--374.

Z. Chen

**23. L^p-posteriori error analysis of mixed methods for linear and quasilinear elliptic problems, **Modeling, Mesh Generation, and Adaptive Numerical Methods for PDEs, I. Babuska, et al., eds., the IMA Volumes in Mathematics and its Applications, Springer-Verlag, New York, Vol.~75, 1995, 187--200.

Z. Chen

**22. Modelling of compositional flow in naturally fractured reservoirs, **Environmental Studies: Mathematical, Computational, and Statistical Analysis, M. F. Wheeler, ed., The IMA Volumes in Mathematics and its Applications, Springer-Verlag, Berlin and New York, Vol.~79, 1995, 65--96.

Z. Chen and Jim Douglas, Jr.

**21. Multiphase flow simulation with various boundary conditions, **Numerical Methods in Water Resources, Vol.~2, A. Peters, et als., eds., Kluwer Academic Publishers, Netherlands, 1994, 925--932.

Z. Chen , Richard E. Ewing and Magne Espedal

**20. Large-scale averaging analysis of single phase flow in fractured reservoirs, **SIAM J. Appl. Math., 54 (1994), 641--659.

Z. Chen

**19. Error estimates for a finite element method for the drift diffusion semiconductor device equations, **SIAM J. Numer. Anal., 31 (1994), 1062--1089.

Z. Chen and Bernardo Cockburn

**18. BDM mixed methods for a nonlinear elliptic problem, **J. Comp. Appl. Math., 53 (1994), 207--223.

Z. Chen

**17. A finite element method for the {\rm2}D drift-diffusion semiconductor model, **Mathematics of Computation: A Half-Century of Computational Mathematics (Walter Gautschi, ed.), Proc. Sympos. Appl. Math., Vol. 48, American Mathematical Society, Providence, RI, 1994, 275--279.

Z. Chen

**16. Finite element analysis for wave propagation in inhomogeneous elastic media, **A Tribute to Ilya Bakeman, I. Bakelman, et al., eds., Discourses in Mathematics and its Applications, Department of Mathematics, Texas A$\&$M University, Texas, 1994, 121--134.

Z. Chen

**15. Projection finite element methods for semiconductor device equations, **Computers Math. Applic., 25 (1993), 81--88.

Z. Chen

**14. Analysis of mixed methods using conforming and nonconfirming finite element methods, **RAIRO Model. Math. Anal. Numer., 27 (1993), 9--34.

Z. Chen

**13. Runge-Kutta local projection discontinuous Galerkin methods for conservation laws and applications to the hydrodynamic device model, **A Collection of Technical Papers, 1993 Conference on Scientific and Engineering Computing for Young Chinese Scientists, Computing Center, Academia Sinia, ed., Vol.~1, 1993, 40--45.

Z. Chen

**12. Finite element simulation of the hydrodynamic model for semiconductor devices, **Proceedings of the Sixth SIAM Conference on Parallel Processing for Scientific Computing, R. F. Sincovec, ed., Vol.~1, 1993, 228--236.

Z. Chen , Bernardo Cockburn, Joseph W. Jerome and Chiwang Shu

**11. A quasi-projection analysis for elastic wave propagation in fluid saturated porous media, **J. Comput. Math., 10 (1992), 366--375.

Z. Chen

**10. Approximation of coefficients in hybrid and mixed methods for nonliner parabolic problems, **Mat. Aplic. Comp., 10 (1991), 137--160.

Z. Chen and Jim Douglas, Jr.

**9. Unified analysis of the hybrid form of mixed finite elements for second order elliptic problems, **J. Engng. Math., 8 (1991), 91--102.

Z. Chen

**8. Hybrid variable finite elements for semiconductor devices, **Computers Math. Applic., 19 (1990), 65--73.

Z. Chen

**7. On the existence, uniqueness and convergence of nonlinear mixed finite element methods, **Mat. Aplic. Comp., 8 (1989), 241--258.

Z. Chen

**6. Prismatic mixed finite elements for second order elliptic problems, **Calcolo, 26 (1989), 135--148.

Z. Chen and Jim Douglas, Jr.

**5. The convergence of the multigrid algorithm for Navier-Stokes equations, **J. Comput. Math., 5 (1987), 227--237.

Z. Chen and Kaitai Li

**4. The multigrid algorithm for mixed equations, **Appl. Math. AJCU, 2 (1987), 49--63.

Z. Chen and Kaitai Li

**3. On the relationship between mixed and Galerkin finite element methods, **Center of Applied Mathematics Technical Report #160, Purdue University, West Lafayette, Indiana, 1991.

Z. Chen

**2. Modeling of and numerical methods for compositional flow in naturally fractured reservoirs, **Army High Performance Computing Research Center Technical Report 93--113, University of Minnesota, Minneapolis, 1993.

Z. Chen

**1. On the finite element simulation of the hydrodynamic model for semiconductor devices, **Army High Performance Computing Research Center, University, of Minnesota, Minneapolis, 1993, Graphics Product, 1992.

Z. Chen

- National Science Foundation, 2006--2009.
- The Chinese Ministry of Education, 2005--2010.
- National Science Foundation (MRI), 2005--2006.
- China National Petroleum Corp. (CNPC), 2005--2007.
- U.S.-South Korean Program, National Science Foundation, 2003.
- PDVSA-Intevep, Venezuela, 2002.
- US Army Research Office (Conference), 2001.
- National Science Foundation (SCREMS), 2001.
- National Science Foundation (AMS, SIAM, and IMS joint meeting), 2001.
- National Science Foundation (Internatinal Program), 1999--2002.
- National Science Foundation, 1999--2002.
- The Mobil Technology Company, 1999--2000.
- U.S. Army Research Office, the Asian Office of Aerospace Research and Development, and the Office of Naval Research, 1999.
- National Science Foundation, 1996--99.
- U.S. Army Research Office, 1998.
- Southern Methodist University research grant, 1998.
- Southern Methodist University research grant, 1996.
- Department of Energy with ISC, 1993--95.
- Legislative Commission on Minnesota Resources, Minnesota, 1993.
- U.S. Army Research Office with AHPCRC, 1991--93.

- "Prismatic Mixed Finite Elements'" (seminar), Department of Mathematics, Purdue University, West Lafayette, March 1989.
- "Local Volume Averaging and Homogenization" (seminar), Department of Mathematics, Purdue University, West Lafayette, October 1989.
- "Modeling of Compositional Flow in Fractured Reservoirs" (colloquium), Department of Mathematics, Lamar University, Beaumont, April 1990.
- "Mixed Finite Element Methods for Second Order Elliptic Problems" (colloquium), Department of Mathematics, Kansas State University, Manhattan, Kansas, February 1991.
- "Mixed Finite Element Methods for Nonlinear Second Order Elliptic Problems" (colloquium), Department of Mathematics, Northern Illinois University, Dekalb, Illinois, March 1991.
- "Relationship between Mixed and Nonconforming Finite Elements" (colloquium), Purdue University, West Lafayette, July 1991.
- "Mixed Finite Element Methods" (colloquium), IMA, University of Minnesota, Minneapolis, November 1991.
- "Modelling of Compositional Flow in Fractured Porous Media" (invited talk), Workshop on Environmental Studies, IMA, Minneapolis, July 1992.
- "Numerical Analysis of Semiconductor Devices" (invited minisymposium talk), SIAM 40th Anniversary Meeting, Los Angeles, California, July 1992.
- "Finite Element Simulation of the Hydrodynamic Model for Semiconductor Devices" (colloquium), AHPCRC, University of Minnesota, December 1992.
- "Numerical Methods for the Hydrodynamic Model in Semiconductor Devices" (colloquium), Department of Mathematics, Iowa State University, Ames, Iowa, January 1993.
- "Semiconductor Modeling" (colloquium), Department of Mathematics, University of North Carolina, Wilmington, February 1993.
- "Dual-Porosity Models of Compositional Flow in Fractured Reservoirs" (contributed talk), SIAM Conference on Mathematical and Computational Issues in the Geosciences, Houston, Texas, April 1993.
- "Runge-Kutta Local Projection Discontinuous Galerkin Methods for Conservation Laws and Applications to the Hydrodynamic Device Model" (contributed talk), 8th International Conference on the Math of Finite Elements and Applications, Brunel University, Uxbridge, Middlesex, UK, April 1993.
- "Finite Element Methods for the Hydrodynamic Model in Semiconductor Devices" (invited minisymposium talk), 6th SIAM Conference on Parallel Processing for Scientific Computing, Norfolk, Virginia, March 1993.
- "Mixed-RKDG Finite Element Methods for the Hydrodynamic Model for Semiconductor Device Simulation" (colloquium), Department of Mathematics, Texas A&M University, College Station, Texas, April 1993.
- "L^p-Posteriori Error Analysis of Mixed Methods for Linear and Quasilinear Elliptic Problems" (invited talk), Workshop on Modeling, Adaptivity, and Mesh Generation for Partial Differential Equations, IMA, Minneapolis, July 1993.
- "Modeling of and Numerical Methods for Compositional Flow in Naturally Fractured Reservoirs" (contributed talk), CMWR'94, Heidelberg, Germany, July 1994.
- "Finite Elements for the Quantum Hydrodynamic Model for Semiconductor Devices" (invited minisymposium talk), SIAM 42nd Anniversary Meeting, San Diego, July 1994.
- "Three Models of Compositional Flow in Petroleum Reservoirs" (invited talk), Workshop on Finite Element Modeling of Envir. Problems, Austin, March 1994.
- "From the Classical Model to the Quantum Hydrodynamic Model: Semiconductor Modeling" (colloquium), Department of Mathematics, Texas A&M University, College Station, Texas, May 1994.
- "Modeling of Compositional Flow" (colloquium), University of Bergen, Norway, July 1994.
- "From the Classical Model to the Quantum Hydrodynamic Model: Semiconductor Modeling" (colloquium), IBM, Yorktown Heights, January 1995.
- "Mathematical Models and Numerical Methods for Reservoir Simulation" (colloquium), IBM, Yorktown Heights, New York, January 1995.
- "Mixed Finite Element Methods and their Applications" (colloquium), AT&T Bell Labs, Murray Hill, NJ, February 1995.
- "Mixed Finite Element Methods and their Applications" (colloquium), Colorado State University, Fort Collins, Colorado, February 1995.
- "Mixed and Nonconforming Methods for Second Order Elliptic Problems: Equivalence and Implementation" (contributed talk), Texas Finite Element Circus, College Station, Texas, February 1995.
- "Mixed Finite Element Methods and their Applications" (colloquium), Southern Methodist University, Dallas, Texas, March 1995.
- "Recent Development of Multigrid Algorithms for Mixed and Nonconforming Methods for Second Order Elliptic Problems" (invited minisymposium talk), Eighth Copper Mountain Conference on Multigrid Methods, Copper Mountain, Colorado, April 1995.
- "Recent Development of Multilevel Preconditioners for Mixed and Nonconforming Finite Element Methods" (invited talk), Symposium on Advances and Trends in Computational and Applied Mathematics, Austin, Texas, April 1995.
- "Recent Development of Domain Decomposition Methods and Multilevel Preconditioners for Nonconforming and Mixed Methods for Second Order Elliptic Problems" (contributed talk), the Eighth International Conference on Domain Decomposition Methods, Beijing, China, May 1995.
- Organizing a special session "Multigrid Methods" in the Eighth International Conference on Domain Decomposition Methods, Beijing, China, May 1995.
- "Recent Development of Domain Decomposition Methods and Multilevel Preconditioners for Nonconforming and Mixed Methods for Second Order Elliptic Problems" (colloquium), Xi'an Jiaotong University, Xi'an, China, May 1995.
- "Numerical Methods in Semiconductor Devices" (colloquium), Korea Advanced Institute of Science and Technology, Taejon, Korea, June 1995.
- "On the Convergence of Nonconforming Multigrid Methods" (contributed talk), The Texas Finite Element Rodeo, University of Houston, Houston, Texas, March 1996.
- "Mathematical Models in Porous Media" (invited talk), the Symposium dedicated to Richard Ewing on the occasion of his 50th birthday, Texas A&M University, College Station, Texas, November 1996.
- "Convergence of Multigrid Methods for Nonconforming Finite Elements" (contributed talk), Texas Finite Element Rodeo, Austin, Texas, February 1997.
- "Homogenization of Porous Media" (colloquium), Mobil Technology Company, March 1997.
- "The Analysis of Nonconforming Multigrid Methods and Intergrid Transfer Operators" (invited minisymposium talk), the 8th Copper Mountain Conference on Multigrid Methods Copper Mountain, Colorado, April 1997.
- "Mathematical Models, Theoretical Results and Numerical Methods for Multiphase Flow in Porous Media" (contributed talk), the Fourth SIAM Conference on Mathematical and Computational Issues in the Geosciences, Albuquerque, New Mexico, June 1997.
- "Convergence of Multigrid Methods for Nonconforming Finite Elements" (invited talk), Third IMACS International Symposium on Iterative Methods in Scientific Computation, Jackson Hole, Wyoming, July 1997.
- Organizing a special session "Adaptive and Iterative Methods" in the Third IMACS International Symposium on Iterative Methods in Scientific Computation, Jackson Hole, Wyoming, July 1997.
- "Convergence of Multigrid Methods for Nonconforming Finite Elements" (contributed talk), the Tenth International Conference on Domain Decomposition Methods, Boulder, Colorado, August 1997.
- "Multigrid Methods for Nonconforming Finite Elements" (colloquium), Southern Methodist University, November 1997.
- "Multiphase Flow in Porous Media: Regularity, Uniqueness, and Error Analysis'" (contributed talk), The Texas Finite Element Rodeo, College Station, Texas, March 1998.
- "Mathematical and Numerical Results for Multiphase Flow in Porous Media" (invited minisymposium talk), the American Mathematical Society regional meeting, Manhattan, Kansas, March 1998.
- "Mathematical and Numerical Analysis for Multiphase Flow in Porous Media" (colloquium), the Chinese University of Hong Kong, Hong Kong, June 1998.
- Co-organizing the Second International Conference on Bifurcation Theory and its Numerical Analysis, Xi'an, P. R. China, July 1998.
- "Multiphase Flow in Porous Media" (invited talk), the Second International Conference on Bifurcation Theory and its Numerical Analysis, Xi'an, June 1998.
- "On the Convergence of Galerkin-Multigrid Methods for Nonconforming Finite Elements" (colloquium), Xi'an Jiaotong University, Xi'an, China, July 1998.
- "On the Convergence of Galerkin-Multigrid Methods for Nonconforming Finite Elements" (colloquium), the Chinese Academy of Sciences, Beijing, China, July 1998.
- "Mathematical and Numerical Analysis for Multiphase Flow in Porous Media'" (invited talk), An International Workshop on State of the Art in the Finite Element Method, Hong Kong, July 1998.
- "On the Convergence of Galerkin-Multigrid Methods for Nonconforming Finite Elements'" (invited talk), the Seventh International Colloquium on Numerical Analysis and Computer Sciences, Plovdiv, Bulgaria, August 1998.
- "Recent Results in Porous Media Flows" (invited talk), the Ninth International Colloquium on Differential Equations, Plovdiv, Bulgaria, August 1998.
- "Mathematical and Numerical Analysis for Multiphase Flow in Porous Media" (colloquium), Texas Tech University, Lubbock, Texas, September 1998.
- "Degenerate Two-Phase Incompressible Flow: Local Refinement and Domain Decomposition" (contributed talk), The Texas Finite Element Rodeo, Houston, Texas, March 1999.
- "Multigrid and Multilevel Techniques for Applications of Multiphase Fluid Flow in Porous Media" (invited minisymposium talk), the SIAM Conference on Mathematical and Computational Issues in the Geosciences, San Antonio, Texas, March 1999.
- Organizing a special session "Computational Issues in Numerical Simulation of Multiphase Flow in Porous Media'", the SIAM Conference on Mathematical and Computational Issues in the Geosciences, San Antonio, Texas, March 1999.
- "Convergence of the Wilson Nonconforming Finite Element" (invited minisymposium talk), the 9th Copper Mountain Conference on Multigrid Methods Copper Mountain, Colorado, April 1999.
- "Recent Developments in Simulation of Multiphase Fluid Flow in Porous Media" (invited talk), An International Workshop on Computational Physics: Fluid Flows and Transport in Porous Media, Beijing, China, August 1999.
- Co-organizing an International Workshop on Computational Physics: Fluid Flows and Transport in Porous Media, Beijing, China, August 1999.
- "Mathematical Analysis and Numerical Simulation of Multiphase Flow in Porous Media" (colloquium), INRIA, Le Chesnay Cedex, France, January 2000.
- "Mathematical Analysis and Numerical Simulation of Multiphase Flow in Porous Media" (invited talk), The Mathematics of Porous Media, Oberwolfach, Germany, January 2000.
- "Mathematical and Computational Challenges in Energy and Environmental Modeling" (The Sigma Xi talk), Southern Methodist University, February 2000.
- "On the Relationship of Various Discontinuous Galerkin Methods for Second-Order Elliptic Problems" (contributed talk), The Finite Element Circus/Rodeo, Austin, Texas, February 2000.
- "Mathematical Analysis and Numerical Simulation of Multiphase Flow in Porous Media" (colloquium), University of Wyoming, Laramie, March 2000.
- "Mathematical Analysis and Numerical Simulation of Multiphase Flow in Porous Media" (invited minisymposium talk), Finite Elements in Flow Problems 2000, Austin, Texas, April-May 2000.
- Co-chairing a session "Numerical Methods" at the Finite Elements in Flow Problems 2000, Austin, Texas, April-May 2000.
- "Mathematical and Computational Techniques in Energy and Environmental Modeling" (colloquium), Shanghai Jiaotong University, Shanghai, June 2000.
- "New Conservative Finite Element Schemes" (colloquium), Xi'an Jiaotong University, Xi'an, June 2000.
- "Mathematical Models in Reservoir Simulation" (contributed talk), An International Conference on PDEs and their Computational Methods, Lushan, Jiangxi, June 2000.
- "Mathematical and Computational Techniques in Energy and Environmental Modeling" (invited talk), The Annual Conference on Computational Mathematics, Qinghai, August 2000.
- "Mixed Discontinuous Finite Element Methods for Second Order Problems" (contributed talk), Finite Element Circus, Rutgers University, New Jersey, October 2000.
- "Mathematical and Computational Techniques in Energy and Environmental Modeling" (colloquium), University of Texas at Arlington, Arlington, Texas, January 2001.
- "Relationships Among Characteristic Finite Element Methods for Advection-Diffusion Problems" (contributed talk), Texas Finite Element Rodeo, Southern Methodist University, Dallas, Texas, March 2001.
- "Mixed Discontinuous Finite Element Methods" (colloquium), ExxonMobil, Houston, Texas, March 2001.
- "Mixed Discontinuous Finite Element Methods and Their Applications" (invited minisymposium talk), the American Mathematical Society regional meeting, Las Vegas, Nevada, April 2001.
- "Industrial Mathematics'", SIAM Southwest Regional Mathematics in Industry Workshop, Houston, Texas, April 2001.
- "Mixed Discontinuous Finite Element Methods for Multiphase Flows in Porous Media" (invited minisymposium talk), the American Mathematical Society regional meeting, Morelia, Mexico, May 2001.
- "Different Formulations and Numerical Methods for Multiphase Flows in Porous Media" (invited minisymposium talk), SIAM Geosciences Conference, Boulder, Colorado, June 2001.
- "Different Formulations and Numerical Methods for Multiphase Flows in Porous Media" (invited talk), AMS, SIAM, and IMS Joint Summer Research Conference, South Hadley, Massachusetts, June 2001.
- "A Series of Talks on Finite Element Methods and Their Applications in Industry", Summer School, Center of Computational Physics, Beijing, China, July 2001.
- "Mathematical and Computational Techniques in Petroleum Reservoirs" (colloquium), Research Institute of Petroleum Exploration and Develpment, PetroChina Company Limited, Beijing, China, July 2001.
- "Mathematical and Computational Techniques in Energy and Environmental Modeling" (colloquium), Department of Computational Mathematics, Beijing University, Beijing, China, July 2001.
- "New Technology in Reservoir Simulations" (colloquium), PDVSA-Intevep, Venezuela, August 2001.
- "New Technology in Reservoir Simulations" (colloquium), China National Petroleum Corp. (CNPC), Caracas, Venezuela, August 2001.
- "New Technology in Reservoir Simulations" (colloquium), University of Houston, Texas, October 2001.
- "New Technology in Reservoir Simulations" (colloquium), Texas A&M University, Commerce, Texas, November 2001.
- "A Series of Talks on Discontinuous Galerkin Methods" (invited talk), Workshop on Scientific Computation, National Center for Theoretical Sciences, National Tsing-Hua University, Taiwan, February 2002.
- "Recent Developments in Reservoir Simulation", The Texas Finite Element Rodeo, Texas A&M University, College Station, Texas, March 2002.
- "Recent Developments in Reservoir Simulation" (colloquium), State University of New York, Stony Brook, April 2002. 2002.
- "Recent Developments in Reservoir Simulation" (colloquium), China National Petroleum Corp. (CNPC), Caracas, Venezuela, May 2002.
- "Mixed Discontinuous Finite Element Methods and Their Applications to Fluid Flows" (invited minisymposium talk), SIAM Annual Meeting, Philadephia, July 2002.
- "Discontinuous and Characteristic Finite Elements" (colloquium), National Center for Theoretical Sciences, National Tsing-Hua University, Taiwan, July 2002.
- "A Series of Talks on Finite Element Methods and Their Applications in Industry", Summer School, College of Sciences, Xi'an Jiaotong University, Xi'an, China, August 2002.
- "Mathematical and Computational Techniques in Energy and Environmental Modeling" (invited talk), The Fifth National Conference of Computational Physics, Xi'an, China, August 2002.
- "Recent Developments in Reservoir Simulations" (invited talk), ICM2002-Beijing Satellite Conference on Scientific Computing, Xi'an, China, August 2002.
- "Numerical Reservoir Simulation" (colloquium), Center for Computational Sciences, University of Kentucky, October 2002.
- "Numerical Reservoir Simulations" (invited talk), Numerical Analysis Conference Honoring Professor Raytcho Lazarov on the Occasion of his 60th Birthday, College Station, Texas, January 2003.
- "Stability and Convergence of Mixed Discontinuous Finite Element Methods for Second-Order Differential Problems" (contributed talk), The Texas Finite Element Rodeo, Houston, Texas, March 2003.
- "Mathematical and Computational Techniques in Energy and Environmental Modeling" (invited talk), The EPA Regional Science Council Meeting, Dallas, Texas, May 2003.
- "An Interactive Simulation Platform and its Industrial Applications" (invited minisymposium talk), the Second MIT Conference on Computational Fluid and Solid Mechanics, MIT, Massachusetts, June 2003.
- "Analysis and Numerics for Multiphase Flow in Porous Media" (Key-note presentation), the Second MIT Conference on Computational Fluid and Solid Mechanics, MIT, Massachusetts, June 2003.
- "Reservoir Simulation" (One of four invited instructors), Workshop on Computational Fluid Dynamics, Center for Mathematical Research (CIMAT), Guanajuato, Mexico, June 2003.
- "Numerical Reservoir Simulation" (colloquium), Department of Mathematics, Unversity of Nevada at Las Vegas, Nevada, October 2003.
- "An Overview on Discontinuous Finite Element Methods" (colloquium), Department of Mechanical Engineering and Nevada Center for Advanced Computational Methods, Unversity of Nevada at Las Vegas, Nevada, October 2003.
- "Numerical Reservoir Simulation" (special seminar), Department of Mathematics, Princeton University, New Jersey, November 2003.
- "New Technology in Reservoir Simulation" (plenary talk), The IX Mexican Congress of Fluids, Mexico City, Mexico, November 2003.
- "A Series of Talks on Reservoir Simulation and Ground Water Modeling" (invited talks), Mexican Institute of Petroleum, Mexico City, Mexico, November 2003.
- "New Technology in Reservoir Simulation" (key-note talk), International Workshop on Efficient Techniques for Numerical Solutions of Coupled PDEs and Applications to Reservoir Simulation, Institute for Studies in Theoretical Physics and Mathematics, Tehran, Iran, December 2003.
- "Mathematical and Computational Techniques in Energy and Environmental Modeling" (plenary talk), International Workshop on Efficient Techniques for Numerical Solutions of Coupled PDEs and Applications to Reservoir Simulation, Institute for Studies in Theoretical Physics and Mathematics, Tehran, Iran, December 2003.
- "New Technology in Reservoir Simulation" (invited talk), Research Institute of Petroleum Industry, Tehran, Iran, December 2003.
- "Numerical Reservoir Simulation" (colloquium), Department of Mathematics, University of Houston, Houston, Texas, March 2004.
- "Numerical Reservoir Simulation" (colloquium), Department of Mathematics, Baylor University, Waco, Texas, March 2004.
- "Numerical Reservoir Simulation" (colloquium), Department of Mathematics, Wayne State University, Detroit, Michigan, May 2004.
- "New Technology in Reservoir Simulation" (invited talk), Power Energy and Environmental Research Center, California Institute of Technology, California, June 2004.
- "New Technology in Reservoir Simulation" (invited minisymposium talk), The AIMS Fifth International Conference on Dynamical Systems and Differential Equations, California State Polytechnic University, Pomona, CA, USA, June 2004.
- "Parallel Computation for Multicomponent, Multiphase Flows in Porous Media" (invited minisymposium talk), The AIMS Fifth International Conference on Dynamical Systems and Differential Equations, California State Polytechnic University, Pomona, CA, USA, June 2004.
- "Opportunities and Challenges in Computational Sciences" (colloquium), College of Computer Science and Engineering, Shanghai University, Shanghai, China, July 2004.
- "Opportunities in Development of the Next Generation of Petroleum Reservoir Simulators" (colloquium), College of Science, Xi'an Jiaotong University, Xi'an, China, July 2004.
- "Scanning Technology's Application in Reservoir Simulation" (invited talk), International Conference on 3D CT Graphing Technology, Xi'an, China, July 2004.
- "Control Volume Methods" (invited talk), International Conference on 3D CT Graphing Technology, Xi'an, China, July 2004.
- "Opportunities and Challenges in Development of the Next Generation of Petroleum Reservoir Simulators" (plenary talk), Three National Conferences on Computational Mathematics, Ulmqi, Xinjiang, August 2004.
- "Control Volume Finite Element Methods" (colloquium), Institute of Applied Physics and Computational Mathematics, Beijing, China, August 2004.
- "Parallel Computations in Reservoir Simulation" (invited talk), Analysis, Modeling and Computation of PDEs and Multiphase Flow in Celebration of James Glimm's 70th Birthday, SUNY at Stony Brook, New York, August 2004.
- "Computing Technologies in Reservoir Simulation" (plenary talk), an International Conference on Scientific Computing in Petroleum Industry, Jiuhua Resort, Beijing, China, August 2004.
- "High Performance Computing in Reservoir Simulation" (plenary talk), The International Conference on High Performance Computing and Applications, Shanghai University, Shanghai, China, August 2004.
- "Opportunities in Development of the Next Generation of Petroleum Reservoir Simulators" (colloquium), Ding Tech Comp., Shanghai, China, August 2004.
- "Mathematical and Computational Techniques in Energy and Environmental Modeling" (colloquium), University of Manitoba, Winnipeg, Canada, December 2004.
- "Discontinuous Finite Element Methods" (colloquium), Institute of Applied Physics and Computational Mathematics, Beijing, China, December 2004.
- "Mathematical and Computational Techniques in Energy and Environmental Modeling" (colloquium), Beijing University, Beijing, China, December 2004.
- "Unstructured Grid Techniques in Petroleum Reservoir Simulations" (seminar), Institute for Scientific Computation, Texas A&M University, College Station, Texas, February 2005.
- "Unstructured Grid Techniques in Petroleum Reservoir Simulations" (invited talk), a workshop on Fluid Mixing by Permedia, BP, Unocal, ExxonMobil, Anadarko, Total, and ConocoPhillips, Houston, Texas, February 2005.
- "Unstructured Grid Techniques in Petroleum Reservoir Simulations" (colloquium), Permedia Research Group, Ottawa, Canada, March 2005.
- "Control Volume Finite Element Methods and Their Applications to Multiphase Flows in Porous Media" (invited minisymposium talk), the Eighth U.S. National Congress on Computational Mechanics, Austin, Texas, July 2005.
- "New Research Directions in Petroleum Reservoir Simulation" (invited talk), Summer School on Partial Differential Equations, Xi'an Jiaotong University, Xi'an, China, July 2005.
- "New Research Directions in Petroleum Reservoir Simulation" (invited talk), Conference of Numerical Analysis and its Applications on the Occasion of Prof. Aixiang Huang's 70th Birthday, Hunan Normal University, Changsha, China, July 2005.
- "Foamy Flows" (seminar), China National Oil and Gas Exploration and Development Corporation, Beijing, China, July 2005.
- "Control Volume Finite Element Methods and Their Applications to Petroleum Reservoir Simulation" (colloquium), Institute of Computational Mathematics, Chinese Academy of Science, Beijing, China, July 2005.
- "New Research Directions in Petroleum Reservoir Simulation" (colloquium), Institute of Applied Physics and Computational Mathematics, Beijing, China, August 2005.
- "Fluid Mixing Problems in Porous Media" (seminar), ConocoPhillips, Houston, Texas, August 2005.
- "Integrated Environmental Modeling" (invited talk), Integrated Environmental Modeling Workshop in Texas, Southern Methodist University, Dallas, Texas, August 2005.
- "Mathematical and Computational Techniques in Reservoir Simulation" (colloquium), Department of Computational and Applied Mathematics, Rice University, Houston, Texas, September 2005.

"Fluid Mixing Instabilities" (invited talk), a workshop on Reservoir Fluids and Fluid Mixing by Permedia, BP, BG, Unocal, ExxonMobil, Anadarko, Shell, Statoil Research, and ConocoPhillips, Houston, Texas, October 2005. - "Alternating Direction Methods for Mixed Finite Element Systems" (invited talk), 50 Years of Alternating Direction Methods: Celebrating the Contributions of Jim Douglas, Don Peaceman, and Henry Rachford, Rice University, Houston, Texas, November 2005.
- "Control Volume Finite Element Methods and Their Applications to Multiphase Flows in Porous Media" (invited minisymposium talk), Joint AMS, MAA, and SIAM Mathematics Meetings. San Antonio, Texas, January 12-15, 2006.
- "Mathematics and Calculus Education Reform" (invited talk), International Symposium on Mathematics Education Reform, Beijing, China, March 20-22, 2006.
- "Fluid Mixing for Porous Media Flows" (invited talk), Oil Industrial Meeting, Ottawa, Canada, April 26--28, 2006.
- "Parallel Computing in Petroleum Engineering" (invited talk), Oil Industrial Meeting, Ottawa, Canada, April 26--28, 2006.
- "Laboratory Experiments, Mathematical Modeling and Numerical Methods for Foamy Oil Reservoirs" (invited talk), Fifth International Conference on Scientific Computing and Applications, May 18--21, 2006, University of Alberta, Edmonton, Alberta, Canada.
- "Ten Lectures on Multiphase Flows in Porous Media", The Distinguished Lecturer at the NSF-CBMS Regional Research Conference, University of Nevada, Las Vegas (UNLV), May 23--27, 2006.
- "Mixed Finite Element Methods for Multiphase Flows in Porous Media" (colloquium), Department of Applied Mathematics, National ChungHsing University, Taichung, Taiwan, June 2006.
- "Mathematical and Computational Techniques in Energy and Environmental Modeling" (colloquium), Department of Applied Mathematics, National Chiao Tung University, Hsinchu 30050, Taiwan, June 2006.
- "Laboratory Experiments, Mathematical Modeling and Numerical Methods for Foamy Oil Reservoirs" (colloquium), Institute of Applied Mathematics, Chinese Academy of Science, Beijing, China, June 2006.
- "Computational Methods for Multiphase Flows in Porous Media" (invited talk), The Launching Meeting on Networks and Heterogeneous Media, Maiori, Italy, June 21-23 2006.
- "Heavy Oil Modeling and Simulation" (invited talk), International Conference on Partial Differential Equations and Numerical Analysis, Changsha, Hunan, China, 22-26 June, 2006.
- "Are New Energy Resources within Reach?" (colloquium), Jiangxi University of Science and Technology, Ganzhou, Jiangxi, China, June 2006.
- "Mathematical and Computational Techniques in Energy and Environmental Modeling" (colloquium), Jiangxi University of Science and Technology, Ganzhou, Jiangxi, China, June 2006.
- "Are New Energy Resources within Reach?" (colloquium), Ganzhou Normal College, Ganzhou, Jiangxi, China, June 2006.
- "Mathematical Problems in New Energy Resources Modeling" (colloquium), Nanchang University, Nanchang, China, July 2006.
- "Computational Methods for Multiphase Flows in Porous Media" (invited lecture), International (NATO) Summer School on Modern Problems of Fluid Mechanics and Heat Transfer in Porous Media, July 2--8, 2006, Istanbul Technical University, Maslak-Istanbul, Turkey.
- "Laboratory Experiments, Mathematical Modeling and Numerical Methods for Foamy Oil Reservoirs" (invited talk), Workshop on Scientific Computing, Tsinghua University, Beijing, China, July 13--14, 2006.
- "Multiphase Flow Simulation in Porous Media" (invited talk), An International Conference on Scientific Computing Dedicated to Professor Qun Lin's 70th Birthday, Institute of Computational Mathematics, Chinese Academy of Science, Beijing, China, July 15--16, 2006.
- "Multiscale Methods" (colloquium), Institute of Applied Physics and Computational Mathematics, Beijing, China, July 2006.
- "Finite Element Methods for 2nd and 4th Order Linear and Nonlinear Problems" (a series of lectures), The Principal Lecturer at the Summer School, Xi'an Jiaotong University, Xi'an, China, July 2006.
- "Numerical Petroleum Reservoir Simulation" (colloquium), Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, Canada, August 2006.
- "Are New Energy Resources within Reach?" (inaugural lecture), School of Energy, University of Wyoming, Laramie, Wyoming, September 2006.
- "n-Component Fluid Mixing" (invited talk), Consortium Steering Committee Meeting, Celtic Manor, Wales, October 2006.
- "Recent Development of a Black Oil Simulator" (invited talk), Consortium Steering Committee Meeting, Celtic Manor, Wales, October 2006.
- "Mathematical and Computational Techniques for New Energy Resources Modeling" (invited talk), Eighth IMACS International Symposium on Iterative Methods in Scientific Computation in Conjunction with A Scientific Celebration of the Sixtieth Birthday of Professor Richard E Ewing, Texas A&M University, College Station, Texas, USA, November 2006.
- "N-Component Fluid Mixing" (invited talk), Workshop on Fluid Mixing, Shell, Houston, Texas, November 2006.
- "Energy Applications of Fluid Flow Through Porous Media" (The Main Speaker), The RMMC (Rocky Mountain Mathematical Consortium) Conference, Wyoming, USA, June 18--29, 2007.
- "What are the Main Road Blocks in the Mathematical Modeling and Computer Simulation of Engineering Problems?", Summer School, Xi'an Jiaotong Universty, Xi'an, China, June 2--July 4, 2007.
- "Mathematical and Computational Techniques for New Energy Resources Modeling" (invited talk), International Workshop on Computational Methods in Geosciences on the occasion of Professor Jim Douglas, Jr.'s 80th birthday, Xian, Shaanxi, China, July 5--7, 2007.
- "What are the Main Road Blocks in the Mathematical Modeling and Computer Simulation of Engineering Problems?" (colloquium), Institute of Computational Mathematics, Chinese Academy of Sciences, Beijing, China, July 12, 2007.
- "What are the Main Road Blocks in the Mathematical Modeling and Computer Simulation of Engineering Problems?" (colloquium), Department of Mathematics, Shandong University, Jinan, China, July 27, 2007.
- "Advanced Reservoir Simulation", Summer School, College of Engineering, Peking University, Beijing, China, July 9--August 10, 2007.
- "Chair Reservoir Simulation Research and Education Plans in the Next Five Years" (invited talk), Foundation CMG Technical Symposium and Annual General Meeting, Calgary, Canada, September 5, 2007
- "Mathematical Difficulties in Reservoir Simulation" (invited talk), Fekete Associates Inc., Calgary, Canada, November 7, 2007.
- "Building Better Models and Solvers" (invited talk), Petro-Canada, Calgary, Canada, November 28, 2007.
- "Building Better Models and Solvers" (invited talk), Suncor Energy Inc., Calgary, Canada, December 4, 2007.
- "Building Better Models and Solvers" (invited talk), Shell Canada Limited, Calgary, Canada, December 5, 2007.
- "Building Better Models and Solvers" (invited talk), EnCana Corp., Calgary, Canada, December 13, 2007.
- "Fluid Mixing Simulation" (invited talk), Partial Differential Equations in Applied and Engineering Sciences: Modelling and Simulation, a conference honoring Jim Douglas, Jr. for his 80th birthday, INRIA Paris - Rocquencourt, France, , December 13-14, 2007.
- "Building Better Models and Solvers" (invited talk), Athabasca Oil Sands Corp., Calgary, Canada, January 15, 2008.
- "Building Better Models and Solvers" (invited talk), Nexen Inc., Calgary, Canada, January 17, 2008.
- "Recent Advances on Stabilization Mixed Finite Element Methods for Equations of Fluid Mechanics" (seminar), Institute of Computational Mathematics, Chinese Academy of Science, Beijing, China, June 30, 2008.
- "Beyond CSS, SAGD and VAPEX: Reservoir Modeling and Simulation for Heavy Oil and Oil Sands" (seminar), China University of Petroleum, Beijing, China, June 30, 2008.
- "Recent Advances on Stabilization Mixed Finite Element Methods for Equations of Fluid Mechanics" (seminar), Institute of Applied Physics and Computational Mathematics, Beijing, China, July 1, 2008.
- "Computing Heavy Oil and Oil Sands" (invited talk), International Conference on Modeling and Simulation 2008, Xi'an Jiaotong University, Xi'an, Shaanxi, China, July 9--12, 2008.
- "Computing Heavy Oil and Oil Sands" (plenary talk), The 3rd North-West Conference on Computational Mathematics, Kunming, China, July 24--25, 2008.
- "Computing Heavy Oil and Oil Sands" (plenary talk), Joint Conference of Computational Mechanics and IBM, Shanghai, China, July 25--26, 2008.
- "Beyond CSS, SAGD and VAPEX: Reservoir Modeling and Simulation for Heavy Oil and Oil Sands" (seminar), University of Pittsburgh, Pittsburgh, PA, Sept. 30, 2008.
- "Integrated Reservoir Simulation" (invited talk), CMG Reservoir Simulation Foundation Annual General Meeting, Calgary, Canada, October 22, 2008.
- "Reservoir Simulation Course" (instructor), Center for Mathematical Research (CIMAT), Guanajuato, Mexico, October 27-31, 2008.
- "Integrated reservoir simulation and basin models: Reservoir charging and fluid mixing", 2009 SPE Reservoir Simulation Symposium held in The Woodlands, Texas, USA, 2-4 February 2009.
- "Mathematical and Computational Techniques for Modeling Multiphase Flow in Petroleum Reservoirs" (colloquium), Department of Mathematics, University of Calgary, Calgary, AB, February 26, 2009.
- "Better Decisions Through Hardware Acceleration" (key note speech), Nexen Geology, Geophysics, Reservoir Engineering Conference, Canmore, Alberta, Canada, April 21--23, 2009.
- "Energy Modeling" (invited talk), IBM Alberta Centre for Advanced Studies Research Board Meeting, Edmonton, Alberta, Canada, June 24, 2009.

List of Books

**1. Bifurcation Theory and its Numerical Analysis, ** Springer-Verlag, Singapore, 1999, edited by

Z. Chen, Shui-Nee Chow, and Kaitai Li

** 2. Numerical Treatment of Multiphase Flows in Porous Media, ** Lecture Notes in Physics, Vol. 552, 2000, Springer-Verlag, Heidelberg, edited by

Z. Chen, Richard E. Ewing, and Zhong-Ci Shi

** 3. Fluid Flows and Transport in Porous Media: Mathematical and Numerical Treatment, ** Contemporary Mathematics, Vol. 295, American Mathematical Society (http://www.ams.org/bookstore?fn=20&arg1=conmseries&item=CONM-295), 2002, edited by

Z. Chen, and Richard E. Ewing

** 4. Current Trends in Scientific Computing, ** Contemporary Mathematics, Vol. 329, American Mathematical Society, 2003, edited by

Z. Chen, R. Glowinski, and K. Li

** 5. Finite Element Methods and Their Applications, ** Springer-Verlag, Heidelberg, ISBN-3-540-24078-0.

Chap. 1. ELEMENTARY FINITE ELEMENTS

Chap. 2. NONCONFORMING FINITE ELEMENTS

Chap. 3. MIXED FINITE ELEMENTS

Chap. 4. DISCONTINUOUS FINITE ELEMENTS

Chap. 5. CHARACTERISTIC FINITE ELEMENTS

Chap. 6. ADAPTIVE FINITE ELEMENTS

Chap. 7. SOLID MECHANICS

Chap. 8. FLUID MECHANICS

Chap. 9. FLUID FLOW IN POROUS MEDIA

Chap. 10. SEMICONDUCTOR MODELING

Z. Chen

** 6. High Performance Computing and Applications, ** Lecture Notes in Computational Mathematics, Springer-Verlag, Heidelberg, 2005, ISBN-3-540-25785-3.

Z. Chen, R. Glowinski, W. Tong, and W. Zhang

** 7. Computational Methods for Multiphase Flows in Porous Media, in the Computational Science and Engineering Series, Vol. 2, SIAM, Philadephia, PA, 2006, ISBN-0-89871-606-3. **

Chap. 1. Introduction

Chap. 2. Flow and Transport Equations

Chap. 3. Fluid and Rock Properties

Chap. 4. Numerical Methods

Chap. 5. Solution of Linear Systems

Chap. 6. Single Phase Flow

Chap. 7. Two-Phase Flow

Chap. 8. The Black Oil Model

Chap. 9. Compositional Flow

Chap. 10. Nonisothermal Flow

Chap. 11. Chemical Compositional Flow

Chap. 12. Flows in Fractured Porous Media

Chap. 13. Well Modeling

Chap. 14. Special Topics

Nomenclature

Units

References

Index

Z. Chen

** 8. Reservoir Simulation: Mathematical Techniques in Oil Recovery, in the CBMS-NSF Regional Conference Series in Applied Mathematics, Vol. 77, SIAM, Philadelphia, PA, 2007. **

Chap. 1. Introduction

Chap. 2. A Glossary of Petroleum Terms

Chap. 3. Single Phase Flow and Numerical Solution

Chap. 4. Well Modeling

Chap. 5. Two-Phase Flow and Numerical Solution

Chap. 6. The Black Oil Model and Numerical Solution

Chap. 7. Transport of Multicomponents in a Fluid and Numerical Solution

Chap. 8. Compositional Flow and Numerical Solution

Chap. 9. Nonisothermal Flow and Numerical Solution

Chap. 10. Practical Topics in Reservoir Simulation

Nomenclature

References

Index

Z. Chen

** 9. Advanced Reservoir Engineering, 2008. **

Chap. 1. Introduction

Chap. 2. Conventional Analysis

Chap. 3. Fundamentals of Reservoir Fluid Flow

Chap. 4. Analog Model Approaches

Chap. 5. Analytical Soluton Approaches

Chap. 6. Reservoir Simulation

Chap. 7. Well Tests

Nomenclature

References

Index

Z. Chen, I. Gates, S. Larter, M. Pooladi-Darvish, and R. Wang

Certifications:

B.S., University of Jiangxi (1983)

M.S., Xi'an Jiaotong University (1985)

Ph.D., Purdue University (1991)