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A composition-based model for methane adsorption of overmature shales in Wufeng and Longmaxi Formation, Sichuan Basin
  • 2024-01-08
元数据
名   称 A composition-based model for methane adsorption of overmature shales in Wufeng and Longmaxi Formation, Sichuan Basin
科技资源标识 CSTR:11738.14.NCDC.XDA14.PP5620.2024
DOI 10.1016/j.cej.2021.130766
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摘   要 The Wufeng-Longmaxi Formation shale in Sichuan Basin is the main strata of shale gas exploration and development in China. Adsorbed methane is an important part of the total shale gas content. The influence of shale composition on adsorption characteristics is complex, and it is difficult to obtain a comprehensive understanding without a sufficient amount of data. In this work,the total organic carbon (TOC), X-ray diffraction (XRD) mineral analysis, and the excess methane adsorption isotherms with pressure up to 50 MPa at 40 ◦C of 106 overmature shale samples with TOC of 0.8%-9.0% and clay content of 2%-58% that belong to Wufeng-Longmaxi formation from 10 shale gas wells in Sichuan Basin, China are experimentally investigated and analyzed. New correlations found between compositions and methane adsorption characteristic parameters guide the establishment of a composition-based methane adsorption model that the excess adsorption isotherm of shale is the contentweighted sum of equivalent unit-content excess isotherms for organic matter and clay. With this model, the differences of excess isotherms of these two compositions and the differences of clay-contribution to methane adsorption for different sublayers are disclosed. It is beneficial to improve the accuracy of shale reservoir evaluation of studied blocks under the condition of limited coring and deepening the understanding of the underlying mechanism of methane adsorption characteristics.
学科分类
170.50
关键词
Shale gas Wufeng-Longmaxi Methane adsorption Langmuir pressure Clay
作者 Wenbin Jiang,Gaohui Cao,Chao Luo,Mian Lin,Lili Ji,Ji Zhou
数据量 11.2 MiB
论文类型： journal
论文网址： https://doi.org/10.1016/j.cej.2021.130766
期刊名称： Chemical Engineering Journal
出版时间： 2022-02-01
引用和标注
数据引用
Wenbin Jiang,Gaohui Cao,Chao Luo,Mian Lin,Lili Ji,Ji Zhou. A composition-based model for methane adsorption of overmature shales in Wufeng and Longmaxi Formation, Sichuan Basin. 国家冰川冻土沙漠科学数据中心(http://www.ncdc.ac.cn), 2024. https://cstr.cn/CSTR:11738.14.NCDC.XDA14.PP5620.2024.
Wenbin Jiang,Gaohui Cao,Chao Luo,Mian Lin,Lili Ji,Ji Zhou. A composition-based model for methane adsorption of overmature shales in Wufeng and Longmaxi Formation, Sichuan Basin. 国家冰川冻土沙漠科学数据中心(http://www.ncdc.ac.cn), 2024. https://www.doi.org/10.1016/j.cej.2021.130766.
许可协议
知识共享许可协议   本作品采用 知识共享署名 4.0 国际许可协议进行许可。
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