A scalable fully implicit framework for reservoir simulation on parallel computers
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ArticleKAUST Department
Computational Transport Phenomena LabEarth Science and Engineering Program
Physical Science and Engineering (PSE) Division
KAUST Grant Number
BAS/1/1351-01-01Date
2017-11-10Online Publication Date
2017-11-10Print Publication Date
2018-03Permanent link to this record
http://hdl.handle.net/10754/626151
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The modeling of multiphase fluid flow in porous medium is of interest in the field of reservoir simulation. The promising numerical methods in the literature are mostly based on the explicit or semi-implicit approach, which both have certain stability restrictions on the time step size. In this work, we introduce and study a scalable fully implicit solver for the simulation of two-phase flow in a porous medium with capillarity, gravity and compressibility, which is free from the limitations of the conventional methods. In the fully implicit framework, a mixed finite element method is applied to discretize the model equations for the spatial terms, and the implicit Backward Euler scheme with adaptive time stepping is used for the temporal integration. The resultant nonlinear system arising at each time step is solved in a monolithic way by using a Newton–Krylov type method. The corresponding linear system from the Newton iteration is large sparse, nonsymmetric and ill-conditioned, consequently posing a significant challenge to the fully implicit solver. To address this issue, the family of additive Schwarz preconditioners is taken into account to accelerate the convergence of the linear system, and thereby improves the robustness of the outer Newton method. Several test cases in one, two and three dimensions are used to validate the correctness of the scheme and examine the performance of the newly developed algorithm on parallel computers.Citation
Yang H, Sun S, Li Y, Yang C (2017) A scalable fully implicit framework for reservoir simulation on parallel computers. Computer Methods in Applied Mechanics and Engineering. Available: http://dx.doi.org/10.1016/j.cma.2017.10.016.Sponsors
The authors would like to express their appreciations to the anonymous reviewers for the invaluable comments that have greatly improved the quality of the manuscript. The work was supported in part by the National Natural Science Foundation of China (11571100) and the state key laboratory program of LASG (20170062). S. Sun was also supported by KAUST through the grant BAS/1/1351-01-01.Publisher
Elsevier BVAdditional Links
http://www.sciencedirect.com/science/article/pii/S0045782517306862ae974a485f413a2113503eed53cd6c53
10.1016/j.cma.2017.10.016