Multifractal characteristics of pore structure in the terrestrial shale reservoirs of the Lianggaoshan formation in northeast sichuan basin and its geological significance
The exploration of shale oil resources in the Lianggaoshan Formation of the Jurassic System in the Sichuan Basin has made significant progress in recent years, revealing a vast resource potential. This study focuses on the upper Lianggaoshan Formation, employing low-temperature gas adsorption, high-...
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Frontiers Media S.A.
2025-02-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2025.1505090/full |
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| author | Jiping Wang Jiping Wang Hongmei Shao Hongmei Shao Yuanhao Zhang Yuanhao Zhang Zhenxue Jiang Zhenxue Jiang Bo Gao Bo Gao Lingling Li Lingling Li Huifang Pan Huifang Pan Haonan Wang Haonan Wang Xi Lu Xi Lu Hengyuan Qiu Hengyuan Qiu Xiaobiao He Xiaobiao He Chengju Zhang Chengju Zhang |
| author_facet | Jiping Wang Jiping Wang Hongmei Shao Hongmei Shao Yuanhao Zhang Yuanhao Zhang Zhenxue Jiang Zhenxue Jiang Bo Gao Bo Gao Lingling Li Lingling Li Huifang Pan Huifang Pan Haonan Wang Haonan Wang Xi Lu Xi Lu Hengyuan Qiu Hengyuan Qiu Xiaobiao He Xiaobiao He Chengju Zhang Chengju Zhang |
| author_sort | Jiping Wang |
| collection | DOAJ |
| description | The exploration of shale oil resources in the Lianggaoshan Formation of the Jurassic System in the Sichuan Basin has made significant progress in recent years, revealing a vast resource potential. This study focuses on the upper Lianggaoshan Formation, employing low-temperature gas adsorption, high-pressure mercury intrusion, and nuclear magnetic resonance techniques to systematically characterize the pore structure of various lithofacies shales. Furthermore, the pore structure heterogeneity and its controlling factors were investigated through the integration of multifractal theory. Result indicate that high-organic laminated felsic shale exhibit well-developed micropores with a simple and uniform pore structure, making them ideal for shale oil accumulation. Medium-organic bedded felsic shale, also exhibiting laminated and feldspathic textures, possess a more complex mesoporous structure that facilitates hydrocarbon enrichment, but their high heterogeneity presents challenges for exploration and development. Low-organic massive argillaceous siltstone with low organic content demonstrates a complex macroporous structure and high heterogeneity, potentially limiting effective hydrocarbon recovery. Lastly, the pore structure of massive fine-silt sandstone exhibits a high degree of complexity and heterogeneity, revealing the significant influence of quartz and clay mineral interactions on pore development. These findings advance the understanding of shale pore structure and its impact on hydrocarbon enrichment and recovery in the Lianggaoshan Formation, and offer valuable guidance for optimizing “sweet spot” selection. Furthermore, the methodologies and insights presented here are broadly applicable to unconventional resource exploration and development in similar geological settings globally, providing new ideas for researchers studying shale reservoir pore systems. |
| format | Article |
| id | doaj-art-b411d949e563454ca3a1fd501de09d23 |
| institution | Kabale University |
| issn | 2296-6463 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj-art-b411d949e563454ca3a1fd501de09d232025-02-06T07:09:29ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632025-02-011310.3389/feart.2025.15050901505090Multifractal characteristics of pore structure in the terrestrial shale reservoirs of the Lianggaoshan formation in northeast sichuan basin and its geological significanceJiping Wang0Jiping Wang1Hongmei Shao2Hongmei Shao3Yuanhao Zhang4Yuanhao Zhang5Zhenxue Jiang6Zhenxue Jiang7Bo Gao8Bo Gao9Lingling Li10Lingling Li11Huifang Pan12Huifang Pan13Haonan Wang14Haonan Wang15Xi Lu16Xi Lu17Hengyuan Qiu18Hengyuan Qiu19Xiaobiao He20Xiaobiao He21Chengju Zhang22Chengju Zhang23State Key Laboratory of Continental Shale Oil, Daqing, ChinaPetroChina Daqing Oilfield Exploration and Development Research Institute, Daqing, ChinaState Key Laboratory of Continental Shale Oil, Daqing, ChinaPetroChina Daqing Oilfield Exploration and Development Research Institute, Daqing, ChinaState Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum (Beijing), Beijing, ChinaUnconventional Oil and Gas Science and Technology Research Institute, China University of Petroleum, Beijing, ChinaState Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum (Beijing), Beijing, ChinaUnconventional Oil and Gas Science and Technology Research Institute, China University of Petroleum, Beijing, ChinaState Key Laboratory of Continental Shale Oil, Daqing, ChinaPetroChina Daqing Oilfield Exploration and Development Research Institute, Daqing, ChinaState Key Laboratory of Continental Shale Oil, Daqing, ChinaPetroChina Daqing Oilfield Exploration and Development Research Institute, Daqing, ChinaState Key Laboratory of Continental Shale Oil, Daqing, ChinaPetroChina Daqing Oilfield Exploration and Development Research Institute, Daqing, ChinaState Key Laboratory of Continental Shale Oil, Daqing, ChinaPetroChina Daqing Oilfield Exploration and Development Research Institute, Daqing, ChinaState Key Laboratory of Continental Shale Oil, Daqing, ChinaPetroChina Daqing Oilfield Exploration and Development Research Institute, Daqing, ChinaState Key Laboratory of Continental Shale Oil, Daqing, ChinaPetroChina Daqing Oilfield Exploration and Development Research Institute, Daqing, ChinaState Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum (Beijing), Beijing, ChinaUnconventional Oil and Gas Science and Technology Research Institute, China University of Petroleum, Beijing, ChinaState Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum (Beijing), Beijing, ChinaUnconventional Oil and Gas Science and Technology Research Institute, China University of Petroleum, Beijing, ChinaThe exploration of shale oil resources in the Lianggaoshan Formation of the Jurassic System in the Sichuan Basin has made significant progress in recent years, revealing a vast resource potential. This study focuses on the upper Lianggaoshan Formation, employing low-temperature gas adsorption, high-pressure mercury intrusion, and nuclear magnetic resonance techniques to systematically characterize the pore structure of various lithofacies shales. Furthermore, the pore structure heterogeneity and its controlling factors were investigated through the integration of multifractal theory. Result indicate that high-organic laminated felsic shale exhibit well-developed micropores with a simple and uniform pore structure, making them ideal for shale oil accumulation. Medium-organic bedded felsic shale, also exhibiting laminated and feldspathic textures, possess a more complex mesoporous structure that facilitates hydrocarbon enrichment, but their high heterogeneity presents challenges for exploration and development. Low-organic massive argillaceous siltstone with low organic content demonstrates a complex macroporous structure and high heterogeneity, potentially limiting effective hydrocarbon recovery. Lastly, the pore structure of massive fine-silt sandstone exhibits a high degree of complexity and heterogeneity, revealing the significant influence of quartz and clay mineral interactions on pore development. These findings advance the understanding of shale pore structure and its impact on hydrocarbon enrichment and recovery in the Lianggaoshan Formation, and offer valuable guidance for optimizing “sweet spot” selection. Furthermore, the methodologies and insights presented here are broadly applicable to unconventional resource exploration and development in similar geological settings globally, providing new ideas for researchers studying shale reservoir pore systems.https://www.frontiersin.org/articles/10.3389/feart.2025.1505090/fullLianggaoshan formationshale oilnuclear magnetic resonancemultifractal characteristicspore structure |
| spellingShingle | Jiping Wang Jiping Wang Hongmei Shao Hongmei Shao Yuanhao Zhang Yuanhao Zhang Zhenxue Jiang Zhenxue Jiang Bo Gao Bo Gao Lingling Li Lingling Li Huifang Pan Huifang Pan Haonan Wang Haonan Wang Xi Lu Xi Lu Hengyuan Qiu Hengyuan Qiu Xiaobiao He Xiaobiao He Chengju Zhang Chengju Zhang Multifractal characteristics of pore structure in the terrestrial shale reservoirs of the Lianggaoshan formation in northeast sichuan basin and its geological significance Frontiers in Earth Science Lianggaoshan formation shale oil nuclear magnetic resonance multifractal characteristics pore structure |
| title | Multifractal characteristics of pore structure in the terrestrial shale reservoirs of the Lianggaoshan formation in northeast sichuan basin and its geological significance |
| title_full | Multifractal characteristics of pore structure in the terrestrial shale reservoirs of the Lianggaoshan formation in northeast sichuan basin and its geological significance |
| title_fullStr | Multifractal characteristics of pore structure in the terrestrial shale reservoirs of the Lianggaoshan formation in northeast sichuan basin and its geological significance |
| title_full_unstemmed | Multifractal characteristics of pore structure in the terrestrial shale reservoirs of the Lianggaoshan formation in northeast sichuan basin and its geological significance |
| title_short | Multifractal characteristics of pore structure in the terrestrial shale reservoirs of the Lianggaoshan formation in northeast sichuan basin and its geological significance |
| title_sort | multifractal characteristics of pore structure in the terrestrial shale reservoirs of the lianggaoshan formation in northeast sichuan basin and its geological significance |
| topic | Lianggaoshan formation shale oil nuclear magnetic resonance multifractal characteristics pore structure |
| url | https://www.frontiersin.org/articles/10.3389/feart.2025.1505090/full |
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