Petroleum Science >2015, Issue 1: 96-103 DOI: https://doi.org/10.1007/s12182-014-0004-7
Investigation of shale gas microflow with the Lattice Boltzmannmethod Open Access
文章信息
作者：Xiao-Ling Zhang,Li-Zhi Xiao,Long Guo and Qing-Ming Xie
作者单位：
State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;Key Laboratory of Shale Gas Exploration, Ministry of Land and Resources, Chongqing Institute of Geology and Mineral Resources, Chongqing 400042, China
投稿时间：2015-01-13
引用方式：https://doi.org/10.1007/s12182-014-0003-8
文章摘要
In contrast to conventional gas-bearing rocks,
gas shale has extremely low permeability due to its nanoscale
pore networks. Organic matter which is dispersed in
the shale matrix makes gas flow characteristics more
complex. The traditional Darcy’s law is unable to estimate
matrix permeability due to the particular flow mechanisms
of shale gas. Transport mechanisms and influence factors
are studied to describe gas transport in extremely tight
shale. Then Lattice Boltzmann simulation is used to
establish a way to estimate the matrix permeability
numerically. The results show that net desorption, diffusion,
and slip flow are very sensitive to the pore scale. Pore
pressure also plays an important role in mass fluxes of gas.
Temperature variations only cause small changes in mass
fluxes. The Lattice Boltzmann method can be used to study
the flow field in the micropore spaces and then provides
numerical solutions even in complex pore structure models.
Understanding the transport characteristics and establishing
a way to estimate potential gas flow is very important to
guide shale gas reserve estimation and recovery schemes.
gas shale has extremely low permeability due to its nanoscale
pore networks. Organic matter which is dispersed in
the shale matrix makes gas flow characteristics more
complex. The traditional Darcy’s law is unable to estimate
matrix permeability due to the particular flow mechanisms
of shale gas. Transport mechanisms and influence factors
are studied to describe gas transport in extremely tight
shale. Then Lattice Boltzmann simulation is used to
establish a way to estimate the matrix permeability
numerically. The results show that net desorption, diffusion,
and slip flow are very sensitive to the pore scale. Pore
pressure also plays an important role in mass fluxes of gas.
Temperature variations only cause small changes in mass
fluxes. The Lattice Boltzmann method can be used to study
the flow field in the micropore spaces and then provides
numerical solutions even in complex pore structure models.
Understanding the transport characteristics and establishing
a way to estimate potential gas flow is very important to
guide shale gas reserve estimation and recovery schemes.
关键词
-
Shale gas Permeability Adsorption Desorption Diffusion Slip effect