01840nab a2200181 4500 20260520002034.0 260224s2012 xxu Comparison of nonlinear formulations for two-phase multi-component EoS based simulation 2012 02/05/2012 ; 02/05/2012 10 p. ; 101-111 Transcripción del resumen del autor: We analyze several widely used nonlinearformulations for general-purpose compositional reservoir simulation. All the formulations are implemented using a unified computational framework based on automatic differentiation. The numerical behaviors using different variable sets, including the so-called natural and mass variables, are investigated. The fully implicit method (FIM) is used throughout this work. In the FIM framework, the full Jacobian matrix with all the equations and constraint relations as a function of the primary and secondary variables is computed. For a given formulation, rigorous construction of the Schur-complement, in which the full Jacobian is reduced to a system for the primary equations in terms of the primary unknowns, is performed purely algebraically. We study multi-component multiphase displacements with significant pressure variation in both space and time, and we focus on challenges posed by nonlinear phenomena, including the appearance and disappearance of phases, and crossing into and out of the critical region. We analyze the behavior of the Newton-basednonlinear solver as a function of timestep size for different variable sets and for different nonlinear updating strategies. Journal of Petroleum Science & Engineering 82-8360 ARTICULO Voskov, Denis V. 52472 Tchelepi, Hamdi A. 52473 187092 187092 0 0 0 0 254911 BAAB BAAB 2026-03-06 200059197 0 200059197 2026-03-06 00:16:46 2026-03-06 ARTICULO