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Title: Simulation of gas flow in micro-porous media with the regularized lattice Boltzmann method

One primary challenge for prediction of gas flow in the unconventional gas reservoir at the pore-scale such as shale and tight gas reservoirs is the geometric complexity of the micro-porous media. In this paper, a regularized multiple-relaxation-time (MRT) lattice Boltzmann (LB) model is applied to analyze gas flow in 2-dimensional micro-porous medium reconstructed by quartet structure generation set (QSGS) on pore-scale. In this paper, the velocity distribution inside the porous structure is presented and analyzed, and the effects of the porosity and specific surface area on the rarefied gas flow and apparent permeability are examined and investigated. The simulation results indicate that the gas exhibits different flow behaviours at various pressure conditions and the gas permeability is strongly related to the pressure. Finally, the increased porosity or the decreased specific surface area leads to the increase of the gas apparent permeability, and the gas flow is more sensitive to the pore morphological properties at low-pressure conditions.
Authors:
 [1] ; ORCiD logo [2] ;  [1] ; ORCiD logo [2] ;  [1]
  1. University of New South Wales, Sydney (Australia)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Report Number(s):
LA-UR-17-24301
Journal ID: ISSN 0016-2361
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Fuel
Additional Journal Information:
Journal Volume: 205; Journal Issue: C; Journal ID: ISSN 0016-2361
Publisher:
Elsevier
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Office of Fossil Energy (FE). Oil and Natural Gas (FE-30); USDOE
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 58 GEOSCIENCES; Earth Sciences; Energy Sciences; Lattice Boltzmann method; Micro-porous media; Rarefied gas flow
OSTI Identifier:
1415385
Alternate Identifier(s):
OSTI ID: 1413366

Wang, Junjian, Kang, Qinjun, Wang, Yuzhu, Pawar, Rajesh J., and Rahman, Sheik S.. Simulation of gas flow in micro-porous media with the regularized lattice Boltzmann method. United States: N. p., Web. doi:10.1016/j.fuel.2017.05.080.
Wang, Junjian, Kang, Qinjun, Wang, Yuzhu, Pawar, Rajesh J., & Rahman, Sheik S.. Simulation of gas flow in micro-porous media with the regularized lattice Boltzmann method. United States. doi:10.1016/j.fuel.2017.05.080.
Wang, Junjian, Kang, Qinjun, Wang, Yuzhu, Pawar, Rajesh J., and Rahman, Sheik S.. 2017. "Simulation of gas flow in micro-porous media with the regularized lattice Boltzmann method". United States. doi:10.1016/j.fuel.2017.05.080. https://www.osti.gov/servlets/purl/1415385.
@article{osti_1415385,
title = {Simulation of gas flow in micro-porous media with the regularized lattice Boltzmann method},
author = {Wang, Junjian and Kang, Qinjun and Wang, Yuzhu and Pawar, Rajesh J. and Rahman, Sheik S.},
abstractNote = {One primary challenge for prediction of gas flow in the unconventional gas reservoir at the pore-scale such as shale and tight gas reservoirs is the geometric complexity of the micro-porous media. In this paper, a regularized multiple-relaxation-time (MRT) lattice Boltzmann (LB) model is applied to analyze gas flow in 2-dimensional micro-porous medium reconstructed by quartet structure generation set (QSGS) on pore-scale. In this paper, the velocity distribution inside the porous structure is presented and analyzed, and the effects of the porosity and specific surface area on the rarefied gas flow and apparent permeability are examined and investigated. The simulation results indicate that the gas exhibits different flow behaviours at various pressure conditions and the gas permeability is strongly related to the pressure. Finally, the increased porosity or the decreased specific surface area leads to the increase of the gas apparent permeability, and the gas flow is more sensitive to the pore morphological properties at low-pressure conditions.},
doi = {10.1016/j.fuel.2017.05.080},
journal = {Fuel},
number = C,
volume = 205,
place = {United States},
year = {2017},
month = {6}
}