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

Autor:	Yi Wang, Liang Gong, Shuyu Sun
Rok vydání:	2018
Předmět:	Permeability (earth sciences) Materials science Linearization Computation Numerical analysis Mass balance 0208 environmental biotechnology Compressibility 02 engineering and technology Mechanics Porous medium Conservation of mass 020801 environmental engineering
Zdroj:	Lecture Notes in Computer Science ISBN: 9783319937120 ICCS (3)
DOI:	10.1007/978-3-319-93713-7_10
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8ed4de01207126b7df172164f3358478 https://doi.org/10.1007/978-3-319-93713-7_10 Zobrazit plný text záznamu