Events

Speaker:  Dr. Alexander A. Lukyanov, Principal Research Scientist at Schlumberger-Doll Research (SDR)

Title of Seminar: “Reservoir Modelling: Key Challenges and Recent Advances”

Abstract: Reservoir simulators have to be very robust, scalable and fast. However, due to the different geological structures and properties of oil and gas reservoirs and the use of enhanced oil recovery (EOR) techniques, the governing equations are strongly non-linear and hard to solve. There is a number of challenges associated with mathematical models describing physical processes and solution strategies. For example, the Jacobian system is solved usually by using FGMRES preconditioned by the two-level Constrained Pressure Residual (CPR) preconditioner. The driving force of the CPR preconditioner is the solution of the pressure equation. The industry standard for solving the pressure equation is the Algebraic Multigrid (AMG) solver. AMG is well known for its parallel efficiency when increasing the problem size (weak scalability). However, this does not hold for a fixed problem size when increasing the number of computing nodes (strong scalability). This degradation in scalability is due to the increased level of communication in the algorithm, which leads to a key problem at a linear solver stage. This talk will describe the key computational challenges and recent advances in solving them, including multiscale modelling, meshless deflation, flash calculations etc.

Biography:   Dr. Alexander A. Lukyanov is a Principal Research Scientist at Schlumberger-Doll Research (SDR) within the Enhanced & Unconventional Recovery department. He received his PhD in Physics and Mathematics, MSc in Mechanics & Applied Mathematics, MSc in Computer Science. He joined Schlumberger in 2006, where he worked on developing reservoir simulators ECLIPSE and INTERSECT in various projects. His current research interests at SDR are multiscale linear and non-linear solvers, transport in shale reservoir, geo-mechanics, meshless numerical methods, multiphase fluid dynamics. Member of ASME, SIAM and EAGE professional bodies. He is author of over 70 publications in the area of Continuum Mechanics, Damage Mechanics, Plasticity Theory, Shock Wave Physics, Irreversible Thermodynamics, Numerical Methods, and Quantum Mechanics.