| Composition-based methane adsorption models for the Qiongzhusi Formation shale in Deyang-Anyue rift trough of Sichuan Basin, China, and its comparison with the Wufeng-Longmaxi Formation shale | |
Wu, Jianfa1; Jiang WB(江文滨)2,3 ; Luo, Chao1; Lin M(林缅)2,3; Zhong, Kesu1; He YF(何宜繁)1; Li, Yanyou1; Nie, Yuhan1; Ji LL(姬莉莉)2,3; Cao GH(曹高辉)2
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| Corresponding Author | Jiang, Wenbin(jiangwenbin@imech.ac.cn) |
| Source Publication | FUEL
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| 2025-08-01 | |
| Volume | 393Pages:15 |
| ISSN | 0016-2361 |
| Abstract | The Lower Cambrian Qiongzhusi (QZS) Formation marine shale in the aulacogen-uplift overlap area of DeyangAnyue rift trough of Sichuan Basin, China, has emerged as a key target for the next stage of shale gas development. However, a lack of quantitative understanding of methane adsorption characteristics and their relationship with composition hinders accurate gas content evaluation and optimal target selection. In this study, over 80 samples from different sublayers of the QZS Formation in two wells located in the rift trough and the slope belt were comprehensively analyzed. Multivariate linear regression identified organic matter and clay minerals as the dominant factors controlling methane adsorption. Composition-based models were developed to quantify adsorption capacity by summing the products of unit-content adsorption capacities of organic matter and clay minerals and their respective contents. Through the significant correlation between adsorption capacity and micropore volume, the strong control of organic matter and clay minerals on micropore volume was revealed. Compared to the Wufeng-Longmaxi (WF-LMX) Formation shale, the QZS Formation shale exhibits lessdeveloped micropores in unit-content clay minerals, and the unit-clay-mineral methane adsorption capacities are lower for the two wells. However, the QZS shale shows a higher meso/macropore volume fraction in the same porosity range and stronger matrix flow capacity, which enhances rapid gas desorption. These findings provide critical insights into the pore structure and adsorption mechanisms of the QZS Formation, offering theoretical guidance for selecting favorable development areas and optimizing shale gas extraction strategies in the Sichuan Basin. |
| Keyword | Shale Gas Qiongzhusi Formation Wufeng-Longmaxi Formation Methane Adsorption Organic Matter Clay Mineral |
| DOI | 10.1016/j.fuel.2025.134976 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001442122600001 |
| WOS Keyword | SUPERCRITICAL METHANE ; SORPTION ISOTHERMS ; GAS-ADSORPTION ; BLACK SHALES ; EQUATION |
| WOS Research Area | Energy & Fuels ; Engineering |
| WOS Subject | Energy & Fuels ; Engineering, Chemical |
| Funding Project | National Natural Science Foundation of China[42030808] ; Project of Chinese Academy of Sciences[GJ04010303] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA14010304] ; Petro-China Science and Technology Major Project[2019F-31-01] ; Petro-China Science and Technology Major Project[2023ZZ21YJ04] |
| Funding Organization | National Natural Science Foundation of China ; Project of Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Petro-China Science and Technology Major Project |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | 江文滨 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/100246 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.PetroChina Southwest Oil & Gasfield Co, Shale Gas Res Inst, Chengdu 610051, Sichuan, Peoples R China; 2.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Wu, Jianfa,Jiang WB,Luo, Chao,et al. Composition-based methane adsorption models for the Qiongzhusi Formation shale in Deyang-Anyue rift trough of Sichuan Basin, China, and its comparison with the Wufeng-Longmaxi Formation shale[J]. FUEL,2025,393:15. |
| APA | Wu, Jianfa.,江文滨.,Luo, Chao.,林缅.,Zhong, Kesu.,...&曹高辉.(2025).Composition-based methane adsorption models for the Qiongzhusi Formation shale in Deyang-Anyue rift trough of Sichuan Basin, China, and its comparison with the Wufeng-Longmaxi Formation shale.FUEL,393,15. |
| MLA | Wu, Jianfa,et al."Composition-based methane adsorption models for the Qiongzhusi Formation shale in Deyang-Anyue rift trough of Sichuan Basin, China, and its comparison with the Wufeng-Longmaxi Formation shale".FUEL 393(2025):15. |
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