A Physically Based Approach for Modeling Multiphase Fracture-Matrix Interaction in Fractured Porous Media

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Description

Modeling fracture-matrix interaction within a complex multiple phase flow system is a key issue for fractured reservoir simulation. Commonly used mathematical models for dealing with such interactions employ a dual- or multiple-continuum concept, in which fractures and matrix are represented as overlapping, different, but interconnected continua, described by parallel sets of conservation equations. The conventional single-point upstream weighting scheme, in which the fracture relative permeability is used to represent the counterpart at the fracture-matrix interface, is the most common scheme by which to estimate flow mobility for fracture-matrix flow terms. However, such a scheme has a serious flaw, which may ... continued below

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36 pages

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Wu, Y.; Pan, L. & Pruess, K. March 16, 2004.

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Description

Modeling fracture-matrix interaction within a complex multiple phase flow system is a key issue for fractured reservoir simulation. Commonly used mathematical models for dealing with such interactions employ a dual- or multiple-continuum concept, in which fractures and matrix are represented as overlapping, different, but interconnected continua, described by parallel sets of conservation equations. The conventional single-point upstream weighting scheme, in which the fracture relative permeability is used to represent the counterpart at the fracture-matrix interface, is the most common scheme by which to estimate flow mobility for fracture-matrix flow terms. However, such a scheme has a serious flaw, which may lead to unphysical solutions or significant numerical errors. To overcome the limitation of the conventional upstream weighting scheme, this paper presents a physically based modeling approach for estimating physically correct relative permeability in calculating multiphase flow between fractures and the matrix, using continuity of capillary pressure at the fracture-matrix interface. The proposed approach has been implemented into two multiphase reservoir simulators and verified using analytical solutions and laboratory experimental data. The new method is demonstrated to be accurate, numerically efficient, and easy to implement in dual- or multiple-continuum models.

Physical Description

36 pages

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OSTI as DE00837489

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  • Other Information: PBD: 16 Mar 2004

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  • Report No.: NONE
  • Grant Number: NONE
  • DOI: 10.2172/837489 | External Link
  • Office of Scientific & Technical Information Report Number: 837489
  • Archival Resource Key: ark:/67531/metadc779474

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  • March 16, 2004

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  • Dec. 3, 2015, 9:30 a.m.

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  • Feb. 10, 2016, 6:26 p.m.

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Wu, Y.; Pan, L. & Pruess, K. A Physically Based Approach for Modeling Multiphase Fracture-Matrix Interaction in Fractured Porous Media, report, March 16, 2004; Las Vegas, Nevada. (digital.library.unt.edu/ark:/67531/metadc779474/: accessed October 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.