气候变化领域集成服务门户(CCPortal): Laboratory Research on Gas Transport in Shale Nanopores Considering the Stress Effect and Slippage Effect

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DOI	10.1029/2019JB018256
	Laboratory Research on Gas Transport in Shale Nanopores Considering the Stress Effect and Slippage Effect
	Sun Z.; Zhou S.; Li J.; Chen K.; Zhang C.; Zhang Y.; Li P.
发表日期	2020
ISSN	21699313
卷号	125 期号:5
英文摘要	The low permeability of shale, in accretionary complexes and passive continental margins, influences pore pressure generation, and thus induces deformation and fault slip behavior. It is also key in hindering the ability to evaluate shale gas production. Gas is commonly used in measuring the permeability of shale and generally yields high values than that of liquids, due to slippage effect. Separation of the slippage effect from gas permeability is a critical task in the study of low-permeability media. This study measured the gas permeability (Kg) of the Longmaxi shale parallel to bedding (L1P) and perpendicular to bedding (L1V) under different confining pressures (Cp) and pore pressures (Pp), while simultaneously measuring porosity for different values of Cp. Additionally, a new approach is proposed to define the effective stress coefficient and boundary condition for the Klinkenberg correction. The results show that the Kg of L1P is almost unaffected by the slippage effect, while, for L1V, the Klinkenberg correction is required. The Klinkenberg plot of L1V follows the quadratic model from the study by Ashrafi Moghadam and Chalaturnyk (2014, https://doi.org.10/1016/j.coal.2013.10.008), rather than the classic linear Klinkenberg equation. The results also show that, as the Cp increases and/or the Pp decreases, the contribution of the slippage effect to the L1V Kg increased from 20% to 86.5%. Finally, based on the Knudsen number (Kn), the flow regime of L1P changes from Darcy flow (Kn < 0.01) to slip flow (0.01 < Kn < 0.1), and that of L1V is slip flow. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	effective stress coefficient; gas flow regime; gas permeability; Klinkenberg correction; response surface model; slippage effect
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187841
作者单位	Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China; Key Laboratory of Petroleum Resources, Lanzhou, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Sun Z.,Zhou S.,Li J.,et al. Laboratory Research on Gas Transport in Shale Nanopores Considering the Stress Effect and Slippage Effect[J]. 中国科学院西北生态环境资源研究院,2020,125(5).
APA	Sun Z..,Zhou S..,Li J..,Chen K..,Zhang C..,...&Li P..(2020).Laboratory Research on Gas Transport in Shale Nanopores Considering the Stress Effect and Slippage Effect.Journal of Geophysical Research: Solid Earth,125(5).
MLA	Sun Z.,et al."Laboratory Research on Gas Transport in Shale Nanopores Considering the Stress Effect and Slippage Effect".Journal of Geophysical Research: Solid Earth 125.5(2020).