Gas Flow Behavior of Nanoscale Pores in Shale Gas Reservoirs

Weijun Shen, Xizhe Li, Yanmei Xu, Yuping Sun and Weigang Huang
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Weijun Shen: Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
Xizhe Li: PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China
Yanmei Xu: PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China
Yuping Sun: PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China
Weigang Huang: PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China

Energies, 2017, vol. 10, issue 6, 1-12

Abstract: The gas transport in shale nanopores is always one of the major concerns in terms of the development of shale gas reservoirs. In this study, the gas flow regimes in shale nanopores were classified and analyzed according to Knudsen number. Then the gas flow model considering Darcy flow, slip flow, transition flow, molecular free flow and adsorption effect was proposed to evaluate the gas flow behavior in shale nanopores. The result shows that the contributions of Darcy flow, slip flow and transition flow in shale nanopores are reciprocal, and are mainly dominated by pore radius and pressure. The adsorption effect greatly influences the total mass flux. The total mass flux will increase as Langmuir pressure and temperature increase while it will decrease with reservoir pressure and the adsorption thickness. These results can provide insights for a better understanding of gas flow in the shale nanopores so as to optimize the production performance of shale gas reservoirs.

Keywords: shale gas reservoirs; nanoscale pores; Knudsen number; mathematical model; flow behavior (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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