Study on Numerical Methods for Gas Flow Simulation Using Double-Porosity Double-Permeability Model

Yi Wang, Shuyu Sun, Liang Gong

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

In this paper, we firstly study numerical methods for gas flow simulation in dual-continuum porous media. Typical methods for oil flow simulation in dual-continuum porous media cannot be used straightforward to this kind of simulation due to the artificial mass loss caused by the compressibility and the non-robustness caused by the non-linear source term. To avoid these two problems, corrected numerical methods are proposed using mass balance equations and local linearization of the non-linear source term. The improved numerical methods are successful for the computation of gas flow in the double-porosity double-permeability porous media. After this improvement, temporal advancement for each time step includes three fractional steps: (i) advance matrix pressure and fracture pressure using the typical computation; (ii) solve the mass balance equation system for mean pressures; (iii) correct pressures in (i) by mean pressures in (ii). Numerical results show that mass conservation of gas for the whole domain is guaranteed while the numerical computation is robust.
Original languageEnglish (US)
Title of host publicationComputational Science – ICCS 2018
PublisherSpringer Nature
Pages129-138
Number of pages10
ISBN (Print)9783319937120
DOIs
StatePublished - Jun 12 2018

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