Multiscale Simulation Framework for Coupled Fluid Flow and Mechanical Deformation

Tchelepi, Hamdi

关键词: multiscale simulation;    finite-volume methods;    reservoir simulation;    discretization methods;    heterogeneous reservoirs;   

DOI  :  10.2172/1164145
RP-ID  :  DOE-STANFORD-ER25726
PID  :  OSTI ID: 1164145

美国|英语

来源: SciTech Connect

【 摘 要 】

A multiscale linear-solver framework for the pressure equation associated with flow in highly heterogeneous porous formations was developed. The multiscale based approach is cast in a general algebraic form, which facilitates integration of the new scalable linear solver in existing flow simulators. The Algebraic Multiscale Solver (AMS) is employed as a preconditioner within a multi-stage strategy. The formulations investigated include the standard MultiScale Finite-Element (MSFE) andMultiScale Finite-Volume (MSFV) methods. The local-stage solvers include incomplete factorization and the so-called Correction Functions (CF) associated with the MSFV approach. Extensive testing of AMS, as an iterative linear solver, indicate excellent convergence rates and computational scalability. AMS compares favorably with advanced Algebraic MultiGrid (AMG) solvers for highly detailed three-dimensional heterogeneous models. Moreover, AMS is expected to be especially beneficial in solving time-dependent problems of coupled multiphase flow and transport in large-scale subsurface formations.