Evolution of pore structure and adsorption-desorption in oil shale formation rocks after compression

doi:10.1016/j.energy.2023.127913

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	Evolution of pore structure and adsorption-desorption in oil shale formation rocks after compression
	Huang XF(黄先富); Zhao YP(赵亚溥)
刊名	ENERGY
	2023-09-01
卷号	278 页码:127913
关键词	Shale oil and shale gas Adsorption -desorption ishotherms BET specific surface area Total pore volume Fractal dimension Carbon sequestration
ISSN号	0360-5442
DOI	10.1016/j.energy.2023.127913
英文摘要	As the extensive application of reservoir stimulation technologies such as hydraulic fracturing (including CO2 fracturing) and in-situ conversion, identifying the developing rules of the pore structure in shale formations rocks after compression becomes all the more important. Here we carry out experimental studies to reveal the evolution mechanism of pore structure of oil shale formation rocks after compression primarily via adsorptiondesorption isotherms. The results show that the BET specific surface area of the oil shale rocks first increases and then decreases after the confined compression, while the second dominant peak of pore size distribution shows the opposite behaviors. The pore volume experiences the stage of decrease, increase and continuous decrease with the increasing applied stress, and at last decreases by -30% under 700 MPa compression. The increase of fractal dimension of shale formation rocks after compression indicates that the pore structure gets rougher and more heterogeneous. It reveals that the pore structure and pore-system of shale rock experience a very complexed evolution during the compression, including compressing, cementing, splitting and vanishing. This work provides some guidelines for the rational design of stimulation technologies to improve shale oil and gas recovery, and the carbon sequestration in deep earth formations.
分类号	一类
WOS研究方向	Thermodynamics ; Energy & Fuels
语种	英语
WOS记录号	WOS:001023011700001
资助机构	PetroChina Innovation Foundation [2019D-5007-0102] ; National Natural Science Foundation of China (NSFC) [12032019, 12241205, 11702299] ; National Key R amp ; D Program of China [2022YFA1200061]
其他责任者	Zhao, YP (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/92572]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.{Huang, Xianfu, Zhao, Ya-Pu} Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 2.{Huang, Xianfu, Zhao, Ya-Pu} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Huang XF,Zhao YP. Evolution of pore structure and adsorption-desorption in oil shale formation rocks after compression[J]. ENERGY,2023,278:127913.
APA	黄先富,&赵亚溥.(2023).Evolution of pore structure and adsorption-desorption in oil shale formation rocks after compression.ENERGY,278,127913.
MLA	黄先富,et al."Evolution of pore structure and adsorption-desorption in oil shale formation rocks after compression".ENERGY 278(2023):127913.