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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

文献类型：期刊论文

作者Qian, Chao2,3; Li, Xizhe3; Zhang, Qing; Li, Yanchao; Shen WJ(沈伟军); Xing, Hongchuan; Shu, Pinghua; Han, Lingling1,3; Cui, Yue1,3; Huang, Yize1,3
刊名NATURAL RESOURCES RESEARCH
出版日期2023
关键词Wufeng Longmaxi shale In situ reservoir condition Thermodynamic parameters Water saturation Adsorption capacity
ISSN号1520-7439
DOI10.1007/s11053-023-10189-1
英文摘要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.
分类号一类
WOS研究方向Geosciences, Multidisciplinary
语种英语
WOS记录号WOS:000962019200001
资助机构National Natural Science Foundation of China [11802312, U1762216] ; National Science and Technology Major Project [2016ZX05023 001]
其他责任者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.
源URL[http://dspace.imech.ac.cn/handle/311007/91869]  
专题力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
2.Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
3.CNPC Chuanqing Drilling Engn Co Ltd, Shale Gas Explorat & Dev Dept, Chengdu 610051, Sichuan, Peoples R China
4.Chinese Acad Sci, Inst Porous Flow & Fluid Mech, Langfang 065007, Peoples R China
5.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, 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.
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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来源：力学研究所

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