Geological Conditions and Sedimentary Models of Oligocene and Eocene Effective Source Rocks in the Northern Yinggehai Basin
The development of the effective source rocks of the Eocene and Oligocene directly determines the oil and gas exploration potential in the northern Yinggehai Basin in China. Based on the analogy with the Hanoi Depression in Vietnam and the Yacheng District in the Qiongdongnan Basin and the comprehen...
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2025-01-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/13/1/100 |
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| author | Jianxiang Pei Gaowei Hu Zhipeng Huo Zhihong Chen Yabing Chen Xiaofei Fu Weihong Wang Haiyu Liu Yanan Wang Jingshuang Luo Guofei Chen |
| author_facet | Jianxiang Pei Gaowei Hu Zhipeng Huo Zhihong Chen Yabing Chen Xiaofei Fu Weihong Wang Haiyu Liu Yanan Wang Jingshuang Luo Guofei Chen |
| author_sort | Jianxiang Pei |
| collection | DOAJ |
| description | The development of the effective source rocks of the Eocene and Oligocene directly determines the oil and gas exploration potential in the northern Yinggehai Basin in China. Based on the analogy with the Hanoi Depression in Vietnam and the Yacheng District in the Qiongdongnan Basin and the comprehensive analysis of self-geological conditions, the development conditions of Eocene and Oligocene source rocks in the northern Yinggehai Basin are examined, focusing on tectonic evolution, sedimentary facies, and the paleoenvironment. Finally, the sedimentary models for the effective source rocks are established. The tectonic activity controlled the formation of the sedimentary deep depression and the migration of the sedimentary trough center, which migrated from east to west and then south from the Eocene to the Oligocene, leading to the sedimentary migration of good muddy source rocks. There are multiple sedimentary facies in favor of source rocks, including lacustrine facies, shallow marine facies, and delta plain swamps. The paleoenvironment indicates that the paleoclimate transitioned from warm and humid to cold and arid, the redox conditions evolved from semi-reducing to oxic, and paleoproductivity increased from the early to late Oligocene. Therefore, the early Oligocene was more conducive to the enrichment of organic matter. It is speculated that the warm and humid paleoclimate, reducing environment, and high paleoproductivity of the Eocene promoted the sedimentation and preservation of more organic matter. The above studies show that the northern Yinggehai Basin, especially the sedimentary period of the Eocene and Oligocene, has favorable geological conditions for the development of effective source rocks. The sedimentary models for Eocene lacustrine mudstones and Oligocene marine mudstones and marine–continental transitional coal-measure source rocks were established. These studies make up for the serious deficiency of previous research and mean that there is great exploration potential for oil and gas in the northern Yinggehai Basin in China. |
| format | Article |
| id | doaj-art-9e9d3fdcf6394e23a3c69f6069cf305a |
| institution | Kabale University |
| issn | 2077-1312 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj-art-9e9d3fdcf6394e23a3c69f6069cf305a2025-01-24T13:36:51ZengMDPI AGJournal of Marine Science and Engineering2077-13122025-01-0113110010.3390/jmse13010100Geological Conditions and Sedimentary Models of Oligocene and Eocene Effective Source Rocks in the Northern Yinggehai BasinJianxiang Pei0Gaowei Hu1Zhipeng Huo2Zhihong Chen3Yabing Chen4Xiaofei Fu5Weihong Wang6Haiyu Liu7Yanan Wang8Jingshuang Luo9Guofei Chen10Institute of Advanced Studies, China University of Geosciences, Wuhan 430074, ChinaResearch Institute of Exploration and Development, Hainan Branch of CNOOC (China) Co., Ltd., Haikou 570311, ChinaSchool of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066099, ChinaResearch Institute of Exploration and Development, Hainan Branch of CNOOC (China) Co., Ltd., Haikou 570311, ChinaResearch Institute of Exploration and Development, Hainan Branch of CNOOC (China) Co., Ltd., Haikou 570311, ChinaCollege of Geosciences, Northeast Petroleum University, Daqing 163319, ChinaCollege of Geosciences, Northeast Petroleum University, Daqing 163319, ChinaResearch Institute of Exploration and Development, Hainan Branch of CNOOC (China) Co., Ltd., Haikou 570311, ChinaSchool of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066099, ChinaCollege of Geosciences, Northeast Petroleum University, Daqing 163319, ChinaCollege of Geosciences, Northeast Petroleum University, Daqing 163319, ChinaThe development of the effective source rocks of the Eocene and Oligocene directly determines the oil and gas exploration potential in the northern Yinggehai Basin in China. Based on the analogy with the Hanoi Depression in Vietnam and the Yacheng District in the Qiongdongnan Basin and the comprehensive analysis of self-geological conditions, the development conditions of Eocene and Oligocene source rocks in the northern Yinggehai Basin are examined, focusing on tectonic evolution, sedimentary facies, and the paleoenvironment. Finally, the sedimentary models for the effective source rocks are established. The tectonic activity controlled the formation of the sedimentary deep depression and the migration of the sedimentary trough center, which migrated from east to west and then south from the Eocene to the Oligocene, leading to the sedimentary migration of good muddy source rocks. There are multiple sedimentary facies in favor of source rocks, including lacustrine facies, shallow marine facies, and delta plain swamps. The paleoenvironment indicates that the paleoclimate transitioned from warm and humid to cold and arid, the redox conditions evolved from semi-reducing to oxic, and paleoproductivity increased from the early to late Oligocene. Therefore, the early Oligocene was more conducive to the enrichment of organic matter. It is speculated that the warm and humid paleoclimate, reducing environment, and high paleoproductivity of the Eocene promoted the sedimentation and preservation of more organic matter. The above studies show that the northern Yinggehai Basin, especially the sedimentary period of the Eocene and Oligocene, has favorable geological conditions for the development of effective source rocks. The sedimentary models for Eocene lacustrine mudstones and Oligocene marine mudstones and marine–continental transitional coal-measure source rocks were established. These studies make up for the serious deficiency of previous research and mean that there is great exploration potential for oil and gas in the northern Yinggehai Basin in China.https://www.mdpi.com/2077-1312/13/1/100Geological conditionsEocene lacustrine mudstoneOligocene marine–continental source rocksSedimentary model |
| spellingShingle | Jianxiang Pei Gaowei Hu Zhipeng Huo Zhihong Chen Yabing Chen Xiaofei Fu Weihong Wang Haiyu Liu Yanan Wang Jingshuang Luo Guofei Chen Geological Conditions and Sedimentary Models of Oligocene and Eocene Effective Source Rocks in the Northern Yinggehai Basin Journal of Marine Science and Engineering Geological conditions Eocene lacustrine mudstone Oligocene marine–continental source rocks Sedimentary model |
| title | Geological Conditions and Sedimentary Models of Oligocene and Eocene Effective Source Rocks in the Northern Yinggehai Basin |
| title_full | Geological Conditions and Sedimentary Models of Oligocene and Eocene Effective Source Rocks in the Northern Yinggehai Basin |
| title_fullStr | Geological Conditions and Sedimentary Models of Oligocene and Eocene Effective Source Rocks in the Northern Yinggehai Basin |
| title_full_unstemmed | Geological Conditions and Sedimentary Models of Oligocene and Eocene Effective Source Rocks in the Northern Yinggehai Basin |
| title_short | Geological Conditions and Sedimentary Models of Oligocene and Eocene Effective Source Rocks in the Northern Yinggehai Basin |
| title_sort | geological conditions and sedimentary models of oligocene and eocene effective source rocks in the northern yinggehai basin |
| topic | Geological conditions Eocene lacustrine mudstone Oligocene marine–continental source rocks Sedimentary model |
| url | https://www.mdpi.com/2077-1312/13/1/100 |
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