Evolution characteristics and exploration targets of Permian clastic rock reservoirs in Bohai Bay Basin, East China
Based on core observation, thin section examination, fluid inclusions analysis, carbon and oxygen isotopic composition analysis, and other approaches, the structural and burial evolution histories were investigated, and the diagenetic evolution process and genetic/development models were systematica...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-10-01
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| Series: | Petroleum Exploration and Development |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1876380423604501 |
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| author | Yingchang CAO Peipei SUN Lihong ZHOU Guanghui YUAN Huimin LIU Da LOU Zhiping WU Qiang JIN Youlu JIANG |
| author_facet | Yingchang CAO Peipei SUN Lihong ZHOU Guanghui YUAN Huimin LIU Da LOU Zhiping WU Qiang JIN Youlu JIANG |
| author_sort | Yingchang CAO |
| collection | DOAJ |
| description | Based on core observation, thin section examination, fluid inclusions analysis, carbon and oxygen isotopic composition analysis, and other approaches, the structural and burial evolution histories were investigated, and the diagenetic evolution process and genetic/development models were systematically discussed of the Upper Paleozoic Permian clastic rock reservoirs in the Bohai Bay Basin, East China. The Bohai Bay Basin underwent three stages of burial and two stages of uplifting in the Upper Paleozoic. Consequently, three stages of acid dissolution generated by the thermal evolution of kerogen, and two stages of meteoric freshwater leaching occurred. Dissolution in deeply buried, nearly closed diagenetic system was associated with the precipitation of authigenic clay and quartz, leading to a limited increase in storage space. Different structural uplifting–subsidence processes of tectonic zones resulted in varying diagenetic–reservoir-forming processes of the Permian clastic reservoirs. Three genetic models of reservoirs are recognized. The Model I reservoirs with pores formed in shallow strata and buried in shallow to medium strata underwent two stages of exposure to long-term open environment and two stages of meteoric freshwater leaching to enhance pores near the surface, and were shallowly buried in the late stage, exhibiting the dominance of secondary pores and the best physical properties. The Model II reservoirs with pores formed in shallow strata and preserved due to modification after deep burial experienced an early exposure-open to late burial-closed environment, where pore types were modified due to dissolution, exhibiting the dominance of numerous secondary solution pores in feldspar and the physical properties inferior to Model I. The Model III reservoirs with pores formed after being regulated after multiple periods of burial and dissolution experienced a dissolution of acidic fluids of organic origin under a near-closed to closed environment, exhibiting the dominance of intercrystalline micropores in kaolinite and the poorest physical properties. The target reservoirs lied in the waterflood area in the geological period of meteoric freshwater leaching, and are now the Model II deep reservoirs in the slope zone–depression zone. They are determined as favorable options for subsequent exploration. |
| first_indexed | 2024-03-11T16:52:42Z |
| format | Article |
| id | doaj.art-bc6509e5d2204e1daaa2ad60bc4192e6 |
| institution | Directory Open Access Journal |
| issn | 1876-3804 |
| language | English |
| last_indexed | 2024-03-11T16:52:42Z |
| publishDate | 2023-10-01 |
| publisher | KeAi Communications Co., Ltd. |
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| series | Petroleum Exploration and Development |
| spelling | doaj.art-bc6509e5d2204e1daaa2ad60bc4192e62023-10-21T04:22:24ZengKeAi Communications Co., Ltd.Petroleum Exploration and Development1876-38042023-10-0150510771091Evolution characteristics and exploration targets of Permian clastic rock reservoirs in Bohai Bay Basin, East ChinaYingchang CAO0Peipei SUN1Lihong ZHOU2Guanghui YUAN3Huimin LIU4Da LOU5Zhiping WU6Qiang JIN7Youlu JIANG8National Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, China; Laboratory for Marine Mineral Resources Evaluation and Exploration Technology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China; Corresponding authorNational Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, ChinaPetroChina Dagang Oilfield Company, Tianjin 300280, ChinaNational Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, China; Laboratory for Marine Mineral Resources Evaluation and Exploration Technology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, ChinaSinopec Shengli Oilfield Company, Dongying 257001, ChinaPetroChina Dagang Oilfield Company, Tianjin 300280, ChinaNational Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, ChinaNational Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, ChinaNational Key Laboratory of Deep Oil and Gas, China University of Petroleum (East China), Qingdao 266580, ChinaBased on core observation, thin section examination, fluid inclusions analysis, carbon and oxygen isotopic composition analysis, and other approaches, the structural and burial evolution histories were investigated, and the diagenetic evolution process and genetic/development models were systematically discussed of the Upper Paleozoic Permian clastic rock reservoirs in the Bohai Bay Basin, East China. The Bohai Bay Basin underwent three stages of burial and two stages of uplifting in the Upper Paleozoic. Consequently, three stages of acid dissolution generated by the thermal evolution of kerogen, and two stages of meteoric freshwater leaching occurred. Dissolution in deeply buried, nearly closed diagenetic system was associated with the precipitation of authigenic clay and quartz, leading to a limited increase in storage space. Different structural uplifting–subsidence processes of tectonic zones resulted in varying diagenetic–reservoir-forming processes of the Permian clastic reservoirs. Three genetic models of reservoirs are recognized. The Model I reservoirs with pores formed in shallow strata and buried in shallow to medium strata underwent two stages of exposure to long-term open environment and two stages of meteoric freshwater leaching to enhance pores near the surface, and were shallowly buried in the late stage, exhibiting the dominance of secondary pores and the best physical properties. The Model II reservoirs with pores formed in shallow strata and preserved due to modification after deep burial experienced an early exposure-open to late burial-closed environment, where pore types were modified due to dissolution, exhibiting the dominance of numerous secondary solution pores in feldspar and the physical properties inferior to Model I. The Model III reservoirs with pores formed after being regulated after multiple periods of burial and dissolution experienced a dissolution of acidic fluids of organic origin under a near-closed to closed environment, exhibiting the dominance of intercrystalline micropores in kaolinite and the poorest physical properties. The target reservoirs lied in the waterflood area in the geological period of meteoric freshwater leaching, and are now the Model II deep reservoirs in the slope zone–depression zone. They are determined as favorable options for subsequent exploration.http://www.sciencedirect.com/science/article/pii/S1876380423604501Bohai Bay BasinPermianclastic rockdiagenetic evolutionreservoir-forming mechanismsecondary pore |
| spellingShingle | Yingchang CAO Peipei SUN Lihong ZHOU Guanghui YUAN Huimin LIU Da LOU Zhiping WU Qiang JIN Youlu JIANG Evolution characteristics and exploration targets of Permian clastic rock reservoirs in Bohai Bay Basin, East China Petroleum Exploration and Development Bohai Bay Basin Permian clastic rock diagenetic evolution reservoir-forming mechanism secondary pore |
| title | Evolution characteristics and exploration targets of Permian clastic rock reservoirs in Bohai Bay Basin, East China |
| title_full | Evolution characteristics and exploration targets of Permian clastic rock reservoirs in Bohai Bay Basin, East China |
| title_fullStr | Evolution characteristics and exploration targets of Permian clastic rock reservoirs in Bohai Bay Basin, East China |
| title_full_unstemmed | Evolution characteristics and exploration targets of Permian clastic rock reservoirs in Bohai Bay Basin, East China |
| title_short | Evolution characteristics and exploration targets of Permian clastic rock reservoirs in Bohai Bay Basin, East China |
| title_sort | evolution characteristics and exploration targets of permian clastic rock reservoirs in bohai bay basin east china |
| topic | Bohai Bay Basin Permian clastic rock diagenetic evolution reservoir-forming mechanism secondary pore |
| url | http://www.sciencedirect.com/science/article/pii/S1876380423604501 |
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