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International Journal for Multiscale Computational Engineering
Импакт фактор: 1.016 5-летний Импакт фактор: 1.194 SJR: 0.452 SNIP: 0.68 CiteScore™: 1.18

ISSN Печать: 1543-1649
ISSN Онлайн: 1940-4352

Выпуски:
Том 17, 2019 Том 16, 2018 Том 15, 2017 Том 14, 2016 Том 13, 2015 Том 12, 2014 Том 11, 2013 Том 10, 2012 Том 9, 2011 Том 8, 2010 Том 7, 2009 Том 6, 2008 Том 5, 2007 Том 4, 2006 Том 3, 2005 Том 2, 2004 Том 1, 2003

International Journal for Multiscale Computational Engineering

DOI: 10.1615/IntJMultCompEng.2017017880
pages 79-98

AN EQUIVALENT CONTINUUM APPROACH FOR MODELING TWO-PHASE FLOW IN FRACTURED-VUGGY MEDIA

Yajun Li
School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, People's Republic of China
Jun Yao
School of Engineering, Isaac Newton Building, University of Lincoln, Brayford Pool, Lincoln LN6 7TS, UK
Yanchao Li
Downhole Service Company, Chuanqing Drilling Company, CNPC, Chengdu 610051, People's Republic of China
Congbin Yin
Downhole Service Company, Chuanqing Drilling Company, CNPC, Chengdu 610051, People's Republic of China
Bin Pan
School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, People's Republic of China
Jungin Lee
School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, People's Republic of China
Mingzhe Dong
School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, People's Republic of China; Department of Chemical and Petroleum Engineering, Schulich School of Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada

Краткое описание

Modeling and numerical simulation of fluid flow in fractured-vuggy media (FVM) is a challenge due to the coexistence of multiscale void spaces filled with fluid and a complex topology configuration. An equivalent continuum approach is proposed for estimating the equivalent permeability tensor (EPT) and modeling two-phase flow with a full permeability tensor. A coupled Stokes-Darcy model is presented to estimate the EPT of a fracture-vug-media system. The operation of two-step mirror imaging is applied to any original block with asymmetric boundaries so as to form a new grid block having symmetric boundaries with periodic boundary conditions. A pretreatment approach for fractured media is developed to replace each fracture and surrounding porous media with continuous media characterized by equivalent permeability. The mixed finite element (MFE) method based on the first-order Brezzi-Douglas-Marini (BDM) space and the discontinuous Galerkin (DG) method are used to solve the pressure equation and the saturation equation for the two-phase flow problem in an equivalent region characterized by a permeability tensor. Several examples are addressed to show the feasibility, validity, and applicability of the methodology in calculating the EPT of FVM and simulating two-phase flow using a permeability tensor, and to illustrate the advantages of integrating complex flow calculations offered by the continuum model with the realism of FVM systems as captured by the discrete model.


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