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Energies 2017, 10(6), 751; doi:10.3390/en10060751

Gas Flow Behavior of Nanoscale Pores in Shale Gas Reservoirs

1
Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China
2
School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China
3
PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China
*
Author to whom correspondence should be addressed.
Academic Editor: Moran Wang
Received: 5 April 2017 / Revised: 13 May 2017 / Accepted: 22 May 2017 / Published: 27 May 2017
(This article belongs to the Section Energy Fundamentals and Conversion)
View Full-Text   |   Download PDF [2289 KB, uploaded 27 May 2017]   |  

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. View Full-Text
Keywords: shale gas reservoirs; nanoscale pores; Knudsen number; mathematical model; flow behavior shale gas reservoirs; nanoscale pores; Knudsen number; mathematical model; flow behavior
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Shen, W.; Li, X.; Xu, Y.; Sun, Y.; Huang, W. Gas Flow Behavior of Nanoscale Pores in Shale Gas Reservoirs. Energies 2017, 10, 751.

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