Hydrocarbon generation, expulsion, and retention characteristics of the Permian Fengcheng shale and Lucaogou shale in the Junggar Basin: implications for the exploration of lacustrine shale oil
Hydrocarbon generation patterns are crucial for defining favorable exploration maturity intervals and targets for shale oil. The Permian Fengcheng shale and Lucaogou shale in the Junggar Basin, as significant targets for shale oil exploration, study on their hydrocarbon generation, expulsion, and re...
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Frontiers Media S.A.
2025-01-01
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| author | Wenjun He Zhiming Li Zhiming Li Zhiming Li Changrong Li Changrong Li Jinyi He Jinyi He Jinyi He Junying Leng Junying Leng Junying Leng Zhongliang Sun Zhongliang Sun Zhongliang Sun Deguang Liu Sen Yang |
| author_facet | Wenjun He Zhiming Li Zhiming Li Zhiming Li Changrong Li Changrong Li Jinyi He Jinyi He Jinyi He Junying Leng Junying Leng Junying Leng Zhongliang Sun Zhongliang Sun Zhongliang Sun Deguang Liu Sen Yang |
| author_sort | Wenjun He |
| collection | DOAJ |
| description | Hydrocarbon generation patterns are crucial for defining favorable exploration maturity intervals and targets for shale oil. The Permian Fengcheng shale and Lucaogou shale in the Junggar Basin, as significant targets for shale oil exploration, study on their hydrocarbon generation, expulsion, and retention characteristics are insufficient. This study establishes hydrocarbon generation patterns for the Fengcheng shale and Lucaogou shale using a semi-open thermal simulation system, combined with rock pyrolysis, vitrinite reflectance (Ro), total organic carbon (TOC) analysis, carbon isotope analysis, gas chromatography-mass spectrometry (GC-MS), mercury porosimetry, and nitrogen adsorption. Additionally, a multivariate regression model was employed to systematically evaluate the primary controlling factors of hydrocarbon expulsion ratio. Based on these results, favorable exploration maturity intervals and targets for the Fengcheng shale and Lucaogou shale were identified. The results indicate that the hydrocarbon generation potential of Fengcheng shale was superior to that of Lucaogou shale, whether considering gas yield or oil yield. However, Lucaogou shale began the thermal degradation earlier than Fengcheng shale and has a broader degradation window. The corresponding (TR) is slightly higher for Fengcheng shale. The Lucaogou shale exhibited significantly higher hydrocarbon expulsion ratios compared to Fengcheng shale, with a maximum hydrocarbon expulsion ratio 2.1 times that of Fengcheng shale. Mesopore volume and its connectivity were critical factors affecting the hydrocarbon expulsion ratio, whereas oil mobility and macropore volume have relatively limited effects. The optimal maturity interval for shale oil exploration as Ro = 1.0%–1.1% for the Fengcheng shale and Ro = 0.9%–1.1% for the Lucaogou shale. Exploration of the Fengcheng shale should focus on lithofacies assemblages, the dolomitic mixed rock-shale assemblages in the shore-shallow lake facies represent the primary exploration target. Exploration of the Lucaogou shale should focus on source-reservoir assemblages, with a higher reservoir-to-shale thickness ratio being the primary exploration target. These findings provide support for the exploration and development decisions of shale oil in the Junggar Basin. |
| format | Article |
| id | doaj-art-7442307011fc4543b07f5cc33d2b4480 |
| institution | Kabale University |
| issn | 2296-6463 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Frontiers Media S.A. |
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| spelling | doaj-art-7442307011fc4543b07f5cc33d2b44802025-01-15T06:10:46ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632025-01-011210.3389/feart.2024.15259831525983Hydrocarbon generation, expulsion, and retention characteristics of the Permian Fengcheng shale and Lucaogou shale in the Junggar Basin: implications for the exploration of lacustrine shale oilWenjun He0Zhiming Li1Zhiming Li2Zhiming Li3Changrong Li4Changrong Li5Jinyi He6Jinyi He7Jinyi He8Junying Leng9Junying Leng10Junying Leng11Zhongliang Sun12Zhongliang Sun13Zhongliang Sun14Deguang Liu15Sen Yang16Petroleum Exploration and Development Institute, Xinjiang Oilfield Company, PetroChina, Karamay, ChinaWuxi Research Institute of Petroleum Geology, SINOPEC (China Petroleum and Chemical Corporation), Wuxi, Jiangsu, ChinaState Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Wuxi, Jiangsu, ChinaSINOPEC (China Petroleum and Chemical Corporation) Key Laboratory of Petroleum Accumulation Mechanisms, Wuxi, Jiangsu, ChinaState Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Wuxi, Jiangsu, ChinaInstitute of Energy, Peking University, Beijing, ChinaWuxi Research Institute of Petroleum Geology, SINOPEC (China Petroleum and Chemical Corporation), Wuxi, Jiangsu, ChinaState Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Wuxi, Jiangsu, ChinaSINOPEC (China Petroleum and Chemical Corporation) Key Laboratory of Petroleum Accumulation Mechanisms, Wuxi, Jiangsu, ChinaWuxi Research Institute of Petroleum Geology, SINOPEC (China Petroleum and Chemical Corporation), Wuxi, Jiangsu, ChinaState Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Wuxi, Jiangsu, ChinaSINOPEC (China Petroleum and Chemical Corporation) Key Laboratory of Petroleum Accumulation Mechanisms, Wuxi, Jiangsu, ChinaWuxi Research Institute of Petroleum Geology, SINOPEC (China Petroleum and Chemical Corporation), Wuxi, Jiangsu, ChinaState Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Wuxi, Jiangsu, ChinaSINOPEC (China Petroleum and Chemical Corporation) Key Laboratory of Petroleum Accumulation Mechanisms, Wuxi, Jiangsu, ChinaPetroleum Exploration and Development Institute, Xinjiang Oilfield Company, PetroChina, Karamay, ChinaPetroleum Exploration and Development Institute, Xinjiang Oilfield Company, PetroChina, Karamay, ChinaHydrocarbon generation patterns are crucial for defining favorable exploration maturity intervals and targets for shale oil. The Permian Fengcheng shale and Lucaogou shale in the Junggar Basin, as significant targets for shale oil exploration, study on their hydrocarbon generation, expulsion, and retention characteristics are insufficient. This study establishes hydrocarbon generation patterns for the Fengcheng shale and Lucaogou shale using a semi-open thermal simulation system, combined with rock pyrolysis, vitrinite reflectance (Ro), total organic carbon (TOC) analysis, carbon isotope analysis, gas chromatography-mass spectrometry (GC-MS), mercury porosimetry, and nitrogen adsorption. Additionally, a multivariate regression model was employed to systematically evaluate the primary controlling factors of hydrocarbon expulsion ratio. Based on these results, favorable exploration maturity intervals and targets for the Fengcheng shale and Lucaogou shale were identified. The results indicate that the hydrocarbon generation potential of Fengcheng shale was superior to that of Lucaogou shale, whether considering gas yield or oil yield. However, Lucaogou shale began the thermal degradation earlier than Fengcheng shale and has a broader degradation window. The corresponding (TR) is slightly higher for Fengcheng shale. The Lucaogou shale exhibited significantly higher hydrocarbon expulsion ratios compared to Fengcheng shale, with a maximum hydrocarbon expulsion ratio 2.1 times that of Fengcheng shale. Mesopore volume and its connectivity were critical factors affecting the hydrocarbon expulsion ratio, whereas oil mobility and macropore volume have relatively limited effects. The optimal maturity interval for shale oil exploration as Ro = 1.0%–1.1% for the Fengcheng shale and Ro = 0.9%–1.1% for the Lucaogou shale. Exploration of the Fengcheng shale should focus on lithofacies assemblages, the dolomitic mixed rock-shale assemblages in the shore-shallow lake facies represent the primary exploration target. Exploration of the Lucaogou shale should focus on source-reservoir assemblages, with a higher reservoir-to-shale thickness ratio being the primary exploration target. These findings provide support for the exploration and development decisions of shale oil in the Junggar Basin.https://www.frontiersin.org/articles/10.3389/feart.2024.1525983/fullshale oilFengcheng shalelucaogou shaleJunggar Basinthermal simulation |
| spellingShingle | Wenjun He Zhiming Li Zhiming Li Zhiming Li Changrong Li Changrong Li Jinyi He Jinyi He Jinyi He Junying Leng Junying Leng Junying Leng Zhongliang Sun Zhongliang Sun Zhongliang Sun Deguang Liu Sen Yang Hydrocarbon generation, expulsion, and retention characteristics of the Permian Fengcheng shale and Lucaogou shale in the Junggar Basin: implications for the exploration of lacustrine shale oil Frontiers in Earth Science shale oil Fengcheng shale lucaogou shale Junggar Basin thermal simulation |
| title | Hydrocarbon generation, expulsion, and retention characteristics of the Permian Fengcheng shale and Lucaogou shale in the Junggar Basin: implications for the exploration of lacustrine shale oil |
| title_full | Hydrocarbon generation, expulsion, and retention characteristics of the Permian Fengcheng shale and Lucaogou shale in the Junggar Basin: implications for the exploration of lacustrine shale oil |
| title_fullStr | Hydrocarbon generation, expulsion, and retention characteristics of the Permian Fengcheng shale and Lucaogou shale in the Junggar Basin: implications for the exploration of lacustrine shale oil |
| title_full_unstemmed | Hydrocarbon generation, expulsion, and retention characteristics of the Permian Fengcheng shale and Lucaogou shale in the Junggar Basin: implications for the exploration of lacustrine shale oil |
| title_short | Hydrocarbon generation, expulsion, and retention characteristics of the Permian Fengcheng shale and Lucaogou shale in the Junggar Basin: implications for the exploration of lacustrine shale oil |
| title_sort | hydrocarbon generation expulsion and retention characteristics of the permian fengcheng shale and lucaogou shale in the junggar basin implications for the exploration of lacustrine shale oil |
| topic | shale oil Fengcheng shale lucaogou shale Junggar Basin thermal simulation |
| url | https://www.frontiersin.org/articles/10.3389/feart.2024.1525983/full |
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