Methane Adsorption Characteristics Under In Situ Reservoir Conditions of the Wufeng Longmaxi Shale in Southern Sichuan Basin, China: Implications for Gas Content Evaluation

doi:10.1007/s11053-023-10189-1

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	Methane Adsorption Characteristics Under In Situ Reservoir Conditions of the Wufeng Longmaxi Shale in Southern Sichuan Basin, China: Implications for Gas Content Evaluation
	Qian, Chao 1,2; Li, Xizhe 1; Zhang, Qing ; Li, Yanchao ; Shen WJ(沈伟军); Xing, Hongchuan ; Shu, Pinghua ; Han, Lingling 1,4; Cui, Yue1,4 ; Huang, Yize 1,4
发表期刊	NATURAL RESOURCES RESEARCH
	2023
ISSN	1520-7439
摘要	The accuracy of adsorbed gas content under actual in situ reservoir conditions is crucial for the evaluation of shale gas reserves. In this study, the characteristics of methane adsorption on the Wufeng Longmaxi shale were investigated under a wide range of pressure (0 51 MPa) and actual in situ water saturation. Methane shale adsorption exhibits the Gibbs excess adsorption phenomenon at high pressure. The excess adsorption amount needs be corrected to absolute adsorption amount, otherwise it will be seriously underestimated. The optimal supercritical methane adsorption model was determined by the corrected Akaike's Information Criterion method. The methane adsorption amount of shale samples ranged from 1.521 to 4.079 m(3)/t. Adsorption capacity was dominated by the total organic carbon content as well as micropore volume and total specific surface area. Additionally, pore volume and specific surface area were contributed mainly by abundant micropores associated with organic matter. Thermodynamic parameters revealed that the adsorption of methane on shale was an exothermic process. As the temperature increased from 40 to 80 degrees C, the methane adsorption capacity decreased from 4.27 to 2.99 m(3)/t, a 30% decrease. The actual in situ water saturation correlated primarily with clay content, regardless of clay types, and increased with clay content. The formation of an adsorbed water film and the blockage of pores for gas adsorption by clusters of water molecules significantly lowered the adsorption capacity. The relative difference in the adsorption capacity increased with water saturation, with the adsorption capacity of water bearing shales decreasing by 21 84% at a water saturation of 30 71% compared to dry shales.
关键词	Wufeng Longmaxi shale In situ reservoir condition Thermodynamic parameters Water saturation Adsorption capacity
DOI	10.1007/s11053-023-10189-1
收录类别	SCI
语种	英语
WOS记录号	WOS:000962019200001
WOS研究方向	Geosciences, Multidisciplinary
WOS类目	Geology
项目资助者	National Natural Science Foundation of China [11802312, U1762216] ; National Science and Technology Major Project [2016ZX05023 001]
论文分区	一类
力学所作者排名	1
RpAuthor	Li, XZ (corresponding author), Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China. ; Shen, WJ (corresponding author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China. ; Shen, WJ (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China.
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/91869
专题	流固耦合系统力学重点实验室
作者单位	1.CNPC Chuanqing Drilling Engn Co Ltd, Shale Gas Explorat & Dev Dept, Chengdu 610051, Sichuan, Peoples R China 2.Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China 3.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Inst Porous Flow & Fluid Mech, Langfang 065007, Peoples R China
推荐引用方式 GB/T 7714	Qian, Chao,Li, Xizhe,Zhang, Qing,et al. Methane Adsorption Characteristics Under In Situ Reservoir Conditions of the Wufeng Longmaxi Shale in Southern Sichuan Basin, China: Implications for Gas Content Evaluation[J]. NATURAL RESOURCES RESEARCH,2023.Rp_Au:Li, XZ (corresponding author), Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China., Shen, WJ (corresponding author), Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China., Shen, WJ (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China.
APA	Qian, Chao.,Li, Xizhe.,Zhang, Qing.,Li, Yanchao.,沈伟军.,...&Huang, Yize.(2023).Methane Adsorption Characteristics Under In Situ Reservoir Conditions of the Wufeng Longmaxi Shale in Southern Sichuan Basin, China: Implications for Gas Content Evaluation.NATURAL RESOURCES RESEARCH.
MLA	Qian, Chao,et al."Methane Adsorption Characteristics Under In Situ Reservoir Conditions of the Wufeng Longmaxi Shale in Southern Sichuan Basin, China: Implications for Gas Content Evaluation".NATURAL RESOURCES RESEARCH (2023).

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