Influencing factors and quantitative prediction of gas content of deep marine shale in Luzhou block
Abstract The exploration and development of deep marine shale gas has made significant breakthroughs, but factors influencing gas contents of deep marine shale are elusive, and quantitative prediction methods of gas content needs to be refined urgently. In this study, the deep marine shale of Longma...
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Nature Portfolio
2025-01-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-86095-8 |
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| author | Xinyang He Kun Zhang Shu Jiang Zhenxue Jiang Xueying Wang Wei Jiang Jing Li Yijia Wu Zhi Gao Tian Tang Cheng Yang Xuejiao Yuan Fengli Han Zeyun Wang Laiting Ye |
| author_facet | Xinyang He Kun Zhang Shu Jiang Zhenxue Jiang Xueying Wang Wei Jiang Jing Li Yijia Wu Zhi Gao Tian Tang Cheng Yang Xuejiao Yuan Fengli Han Zeyun Wang Laiting Ye |
| author_sort | Xinyang He |
| collection | DOAJ |
| description | Abstract The exploration and development of deep marine shale gas has made significant breakthroughs, but factors influencing gas contents of deep marine shale are elusive, and quantitative prediction methods of gas content needs to be refined urgently. In this study, the deep marine shale of Longmaxi Formation in Luzhou area was taken as an example, vitrinite reflectance analysis, kerogen microscopy experiment, TOC content analysis, mineral composition analysis, gas content measurement, isothermal adsorption experiment, physical property analysis and argon ion polishing scanning electron microscopy experiment were carried out to find out factors affecting the gas content of deep marine shale, and a gas content prediction model has been worked out. Conclusions below have been reached: the content of adsorbed gas is mainly affected by Ro, TOC content, porosity, water saturation, clay mineral content, formation temperature and pressure; the content of free gas is mainly controlled by porosity, water saturation, formation temperature and pressure; according to the prediction models, the adsorbed gas content, free gas content and total gas content of each well were quantitatively calculated, and the study area was divided into Class I (with a total gas content ≥ 11 m3/t), Class II (with a total gas content between 9 m3/t and 11 m3/t), and Class III (with a total gas content < 9 m3/t) gas-bearing areas. |
| format | Article |
| id | doaj-art-9699f32ea857495fac3658c08795bc71 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-9699f32ea857495fac3658c08795bc712025-01-19T12:22:08ZengNature PortfolioScientific Reports2045-23222025-01-0115112610.1038/s41598-025-86095-8Influencing factors and quantitative prediction of gas content of deep marine shale in Luzhou blockXinyang He0Kun Zhang1Shu Jiang2Zhenxue Jiang3Xueying Wang4Wei Jiang5Jing Li6Yijia Wu7Zhi Gao8Tian Tang9Cheng Yang10Xuejiao Yuan11Fengli Han12Zeyun Wang13Laiting Ye14State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum UniversityState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum UniversityKey Laboratory of Tectonics and Petroleum Resources (China University of Geosciences), Ministry of EducationState Key Laboratory of Petroleum Resources and Prospecting, China University of PetroleumState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum UniversityShale Gas Exploration and Development Project Department of CNPC Chuanqing Drilling Engineering Company LimitedInstitute of Geological Exploration and Development of CNPC Chuanqing Drilling Engineering Company LimitedInstitute of Geological Exploration and Development of CNPC Chuanqing Drilling Engineering Company LimitedInstitute of Geological Exploration and Development of CNPC Chuanqing Drilling Engineering Company LimitedInstitute of Geological Exploration and Development of CNPC Chuanqing Drilling Engineering Company LimitedInstitute of Geological Exploration and Development of CNPC Chuanqing Drilling Engineering Company LimitedState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum UniversityState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum UniversityState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum UniversityState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum UniversityAbstract The exploration and development of deep marine shale gas has made significant breakthroughs, but factors influencing gas contents of deep marine shale are elusive, and quantitative prediction methods of gas content needs to be refined urgently. In this study, the deep marine shale of Longmaxi Formation in Luzhou area was taken as an example, vitrinite reflectance analysis, kerogen microscopy experiment, TOC content analysis, mineral composition analysis, gas content measurement, isothermal adsorption experiment, physical property analysis and argon ion polishing scanning electron microscopy experiment were carried out to find out factors affecting the gas content of deep marine shale, and a gas content prediction model has been worked out. Conclusions below have been reached: the content of adsorbed gas is mainly affected by Ro, TOC content, porosity, water saturation, clay mineral content, formation temperature and pressure; the content of free gas is mainly controlled by porosity, water saturation, formation temperature and pressure; according to the prediction models, the adsorbed gas content, free gas content and total gas content of each well were quantitatively calculated, and the study area was divided into Class I (with a total gas content ≥ 11 m3/t), Class II (with a total gas content between 9 m3/t and 11 m3/t), and Class III (with a total gas content < 9 m3/t) gas-bearing areas.https://doi.org/10.1038/s41598-025-86095-8Gas contentQuantitative predictionInfluencing factorsDeep marine shaleLongmaxi formation |
| spellingShingle | Xinyang He Kun Zhang Shu Jiang Zhenxue Jiang Xueying Wang Wei Jiang Jing Li Yijia Wu Zhi Gao Tian Tang Cheng Yang Xuejiao Yuan Fengli Han Zeyun Wang Laiting Ye Influencing factors and quantitative prediction of gas content of deep marine shale in Luzhou block Scientific Reports Gas content Quantitative prediction Influencing factors Deep marine shale Longmaxi formation |
| title | Influencing factors and quantitative prediction of gas content of deep marine shale in Luzhou block |
| title_full | Influencing factors and quantitative prediction of gas content of deep marine shale in Luzhou block |
| title_fullStr | Influencing factors and quantitative prediction of gas content of deep marine shale in Luzhou block |
| title_full_unstemmed | Influencing factors and quantitative prediction of gas content of deep marine shale in Luzhou block |
| title_short | Influencing factors and quantitative prediction of gas content of deep marine shale in Luzhou block |
| title_sort | influencing factors and quantitative prediction of gas content of deep marine shale in luzhou block |
| topic | Gas content Quantitative prediction Influencing factors Deep marine shale Longmaxi formation |
| url | https://doi.org/10.1038/s41598-025-86095-8 |
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