Multi-Scale Natural Fracture Prediction in Continental Shale Oil Reservoirs: A Case Study of the Fengcheng Formation in the Mahu Sag, Junggar Basin, China
Natural fractures in continental shale oil reservoirs of the Fengcheng Formation in the Mahu Sag show multi-scale characteristics, which leads to complex seismic responses and difficult identification. In order to establish fracture prediction models with good performance in these reservoirs, this s...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-05-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.929467/full |
| _version_ | 1818551991179149312 |
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| author | Xiaojun Wang Zhijun Jin Zhijun Jin Gang Chen Miao Peng Liliang Huang Zhenlin Wang Lianbo Zeng Guoqing Lu Xiaoyu Du Guoping Liu |
| author_facet | Xiaojun Wang Zhijun Jin Zhijun Jin Gang Chen Miao Peng Liliang Huang Zhenlin Wang Lianbo Zeng Guoqing Lu Xiaoyu Du Guoping Liu |
| author_sort | Xiaojun Wang |
| collection | DOAJ |
| description | Natural fractures in continental shale oil reservoirs of the Fengcheng Formation in the Mahu Sag show multi-scale characteristics, which leads to complex seismic responses and difficult identification. In order to establish fracture prediction models with good performance in these reservoirs, this study uses seismic attributes such as post-stack coherence, curvature, likelihood, and pre-stack AVAz to predict the multi-scale fractures, including main-secondary faults, large-scale fractures, and medium-small scale fractures in continental shale oil reservoirs. The final prediction results are superimposed on the plane to clarify the multi-scale fracture distribution law of the Fengcheng Formation in the Mahu Sag. Seismic prediction results show that natural fractures in the upper sweet spot of the Fengcheng Formation are more developed, especially in the northern and central platform areas, and they are mainly near E-W strikes. With the increase of the primary-secondary fault distance, the fracture density gradually decreases. Natural fractures obtained by seismic prediction are consistent with the fractures interpreted by image logs, which can be used to effectively predict fractures for continental shale oil reservoirs in the Mahu Sag of the Junggar Basin and other areas with a similar geological background. |
| first_indexed | 2024-12-12T09:07:15Z |
| format | Article |
| id | doaj.art-70a72a7e4b4f406f955285d6ff3bd32d |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-12-12T09:07:15Z |
| publishDate | 2022-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-70a72a7e4b4f406f955285d6ff3bd32d2022-12-22T00:29:37ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632022-05-011010.3389/feart.2022.929467929467Multi-Scale Natural Fracture Prediction in Continental Shale Oil Reservoirs: A Case Study of the Fengcheng Formation in the Mahu Sag, Junggar Basin, ChinaXiaojun Wang0Zhijun Jin1Zhijun Jin2Gang Chen3Miao Peng4Liliang Huang5Zhenlin Wang6Lianbo Zeng7Guoqing Lu8Xiaoyu Du9Guoping Liu10PetroChina Xinjiang Oilfield Company, Karamay, ChinaInstitute of Energy, Peking University, Beijing, ChinaPetroleum Exploration and Production Research Institute, Sinopec, Beijing, ChinaPetroChina Xinjiang Oilfield Company, Karamay, ChinaPetroChina Xinjiang Oilfield Company, Karamay, ChinaPetroChina Xinjiang Oilfield Company, Karamay, ChinaPetroChina Xinjiang Oilfield Company, Karamay, ChinaCollege of Geosciences, China University of Petroleum, Beijing, ChinaCollege of Geosciences, China University of Petroleum, Beijing, ChinaInstitute of Energy, Peking University, Beijing, ChinaInstitute of Energy, Peking University, Beijing, ChinaNatural fractures in continental shale oil reservoirs of the Fengcheng Formation in the Mahu Sag show multi-scale characteristics, which leads to complex seismic responses and difficult identification. In order to establish fracture prediction models with good performance in these reservoirs, this study uses seismic attributes such as post-stack coherence, curvature, likelihood, and pre-stack AVAz to predict the multi-scale fractures, including main-secondary faults, large-scale fractures, and medium-small scale fractures in continental shale oil reservoirs. The final prediction results are superimposed on the plane to clarify the multi-scale fracture distribution law of the Fengcheng Formation in the Mahu Sag. Seismic prediction results show that natural fractures in the upper sweet spot of the Fengcheng Formation are more developed, especially in the northern and central platform areas, and they are mainly near E-W strikes. With the increase of the primary-secondary fault distance, the fracture density gradually decreases. Natural fractures obtained by seismic prediction are consistent with the fractures interpreted by image logs, which can be used to effectively predict fractures for continental shale oil reservoirs in the Mahu Sag of the Junggar Basin and other areas with a similar geological background.https://www.frontiersin.org/articles/10.3389/feart.2022.929467/fullmulti-scale natural fracturesprediction methodsdistribution lawcontinental shaleMahu Sag |
| spellingShingle | Xiaojun Wang Zhijun Jin Zhijun Jin Gang Chen Miao Peng Liliang Huang Zhenlin Wang Lianbo Zeng Guoqing Lu Xiaoyu Du Guoping Liu Multi-Scale Natural Fracture Prediction in Continental Shale Oil Reservoirs: A Case Study of the Fengcheng Formation in the Mahu Sag, Junggar Basin, China Frontiers in Earth Science multi-scale natural fractures prediction methods distribution law continental shale Mahu Sag |
| title | Multi-Scale Natural Fracture Prediction in Continental Shale Oil Reservoirs: A Case Study of the Fengcheng Formation in the Mahu Sag, Junggar Basin, China |
| title_full | Multi-Scale Natural Fracture Prediction in Continental Shale Oil Reservoirs: A Case Study of the Fengcheng Formation in the Mahu Sag, Junggar Basin, China |
| title_fullStr | Multi-Scale Natural Fracture Prediction in Continental Shale Oil Reservoirs: A Case Study of the Fengcheng Formation in the Mahu Sag, Junggar Basin, China |
| title_full_unstemmed | Multi-Scale Natural Fracture Prediction in Continental Shale Oil Reservoirs: A Case Study of the Fengcheng Formation in the Mahu Sag, Junggar Basin, China |
| title_short | Multi-Scale Natural Fracture Prediction in Continental Shale Oil Reservoirs: A Case Study of the Fengcheng Formation in the Mahu Sag, Junggar Basin, China |
| title_sort | multi scale natural fracture prediction in continental shale oil reservoirs a case study of the fengcheng formation in the mahu sag junggar basin china |
| topic | multi-scale natural fractures prediction methods distribution law continental shale Mahu Sag |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.929467/full |
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