02179nab a2200217 4500 20260520004415.0 260224s2012 xxu ing Inglés Accurate Modeling of Faults by Multipoint, Mimetic, and Mixed Methods jun. 2012 25/01/2013 ; 23/01/2013 11 p. ; 568-579 Transcripción del resumen del autor: The predominant way of modeling faults in industry-standard flow simulators is to introduce so-called transmissibility multipliers in the underlying two-point discretization. Although this approach provides adequate accuracy in many practical cases, two-point discretizations are only consistent for K-orthogonal grids and may introduce significant discretization errors for grids that severely depart from being K-orthogonal. Such grid-distortion errors can be avoided by lateral or vertical stair-stepping of deviated faults at the expense of errors in the geometrical fault description. In other words, modelers have the choice of either making (geometrical) errors by adapting faults to a grid that is almost K-orthogonal, or introducing discretization errors because of the lack of K-orthogonality if the grid is adapted to deviated faults. We propose a method for accurate description of faults in solvers based on a hybridized mixed or mimetic discretization, which also includes the MPFA-O method. The key idea is to represent faults as internal boundaries and calculate fault transmissibilities directly instead of using multipliers to modify grid-dependent transmissibilities. The resulting method is geology-driven and consistent for cells with planar surfaces and thereby avoids the grid errors inherent in the two-point method. We also propose a method to translate fault transmissibility multipliers into fault transmissibilities. This makes our method readily applicable to reservoir models that contain fault multipliers. 2 SPE Journal 17 ARTICULO Nilsen, Halvor M. 52929 Lie, K.A. 52930 Natvig, Jostein R. 52931 187543 187543 0 0 0 0 255362 BAAB BAAB 2026-03-06 200059666 0 200059666 2026-03-06 00:17:27 2026-03-06 ARTICULO