کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6933709 867752 2013 21 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Higher-order compositional modeling of three-phase flow in 3D fractured porous media based on cross-flow equilibrium
ترجمه فارسی عنوان
مدلسازی ترکیبی بالا تراز جریان سه فاز در رسانه های متخلخل سهبعدی براساس تعادل جریان متقابل
کلمات کلیدی
شکستگی ها، جریان سه فاز، روش های مرتبه بالاتر، ترکیبی رسانه های متخلخل، انتشار فیکیک،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
چکیده انگلیسی
Numerical simulation of multiphase compositional flow in fractured porous media, when all the species can transfer between the phases, is a real challenge. Despite the broad applications in hydrocarbon reservoir engineering and hydrology, a compositional numerical simulator for three-phase flow in fractured media has not appeared in the literature, to the best of our knowledge. In this work, we present a three-phase fully compositional simulator for fractured media, based on higher-order finite element methods. To achieve computational efficiency, we invoke the cross-flow equilibrium (CFE) concept between discrete fractures and a small neighborhood in the matrix blocks. We adopt the mixed hybrid finite element (MHFE) method to approximate convective Darcy fluxes and the pressure equation. This approach is the most natural choice for flow in fractured media. The mass balance equations are discretized by the discontinuous Galerkin (DG) method, which is perhaps the most efficient approach to capture physical discontinuities in phase properties at the matrix-fracture interfaces and at phase boundaries. In this work, we account for gravity and Fickian diffusion. The modeling of capillary effects is discussed in a separate paper. We present the mathematical framework, using the implicit-pressure-explicit-composition (IMPEC) scheme, which facilitates rigorous thermodynamic stability analyses and the computation of phase behavior effects to account for transfer of species between the phases. A deceptively simple CFL condition is implemented to improve numerical stability and accuracy. We provide six numerical examples at both small and larger scales and in two and three dimensions, to demonstrate powerful features of the formulation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Computational Physics - Volume 250, 1 October 2013, Pages 425-445
نویسندگان
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