Factors Controlling Natural Gas Accumulation in the Southern Margin of Junggar Basin and Potential Exploration Targets
In this paper, factors controlling natural gas accumulation in the southern margin of Junggar Basin were mainly discussed by a comparison with natural gas generation and accumulation in the Kuqa Depression of Tarim Basin. The southern margin of Junggar Basin and the Kuqa Depression of Tarim Basin ar...
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Frontiers Media S.A.
2021-04-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2021.635230/full |
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| author | Jianping Chen Xulong Wang Yongge Sun Yunyan Ni Baoli Xiang Jiande Liao |
| author_facet | Jianping Chen Xulong Wang Yongge Sun Yunyan Ni Baoli Xiang Jiande Liao |
| author_sort | Jianping Chen |
| collection | DOAJ |
| description | In this paper, factors controlling natural gas accumulation in the southern margin of Junggar Basin were mainly discussed by a comparison with natural gas generation and accumulation in the Kuqa Depression of Tarim Basin. The southern margin of Junggar Basin and the Kuqa Depression of Tarim Basin are located on the north and south sides of the Tianshan Mountains respectively, and they share the similar sedimentary stratigraphy and tectonic evolution history. In recent several decades, many large gas fields have been found in the Kuqa Depression of Tarim Basin, but no great breakthrough in the southern margin of Junggar Basin. Our results suggest that natural gas in the southern margin of Junggar Basin is mainly thermogenic wet gas, and can be divided into three types as coal-derived gas, mixed gas and oil-associated gas, of which the former two types are dominated. The Jurassic coal measures are the main source rocks of natural gas, and the main gas generation time from this set of source rocks matched well with the formation time of the anticline structures, resulting in favorable conditions for natural gas accumulation. In the western part of the southern margin in the Junggar Basin, the Permian lacustrine and the Upper Triassic lacustrine-swamp source rocks could be important sources of natural gas, and the main gas generation time also matched well with the formation time of traps. Compared with the Kuqa Depression of Tarim Basin, natural gas sources are better in the southern margin of Junggar Basin, and the geologic conditions are favorable for the formation of large oil and gas fields in the southern margin of Junggar Basin. The deep Permian-Jurassic-Cretaceous petroleum system is the most favorable petroleum system for natural gas exploration in the southern margin of Junggar Basin. The western part and the central part of the southern margin in the Junggar Basin could be the first targets for the discovery of the Jurassic coal-derived oil and gas reservoirs. The shallow Cretaceous-Neogene petroleum system is the second target for natural gas exploration. |
| first_indexed | 2024-12-16T14:29:38Z |
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| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-12-16T14:29:38Z |
| publishDate | 2021-04-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Earth Science |
| spelling | doaj.art-5d634b37854a469ab4e5deca5b41c3602022-12-21T22:28:17ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632021-04-01910.3389/feart.2021.635230635230Factors Controlling Natural Gas Accumulation in the Southern Margin of Junggar Basin and Potential Exploration TargetsJianping Chen0Xulong Wang1Yongge Sun2Yunyan Ni3Baoli Xiang4Jiande Liao5PetroChina Research Institute of Petroleum Exploration and Development, Beijing, ChinaPetroChina Xinjiang Oilfield Company, Karamay, ChinaSchool of Earth Sciences, Zhejiang University, Hangzhou, ChinaPetroChina Research Institute of Petroleum Exploration and Development, Beijing, ChinaPetroChina Xinjiang Oilfield Company, Karamay, ChinaPetroChina Xinjiang Oilfield Company, Karamay, ChinaIn this paper, factors controlling natural gas accumulation in the southern margin of Junggar Basin were mainly discussed by a comparison with natural gas generation and accumulation in the Kuqa Depression of Tarim Basin. The southern margin of Junggar Basin and the Kuqa Depression of Tarim Basin are located on the north and south sides of the Tianshan Mountains respectively, and they share the similar sedimentary stratigraphy and tectonic evolution history. In recent several decades, many large gas fields have been found in the Kuqa Depression of Tarim Basin, but no great breakthrough in the southern margin of Junggar Basin. Our results suggest that natural gas in the southern margin of Junggar Basin is mainly thermogenic wet gas, and can be divided into three types as coal-derived gas, mixed gas and oil-associated gas, of which the former two types are dominated. The Jurassic coal measures are the main source rocks of natural gas, and the main gas generation time from this set of source rocks matched well with the formation time of the anticline structures, resulting in favorable conditions for natural gas accumulation. In the western part of the southern margin in the Junggar Basin, the Permian lacustrine and the Upper Triassic lacustrine-swamp source rocks could be important sources of natural gas, and the main gas generation time also matched well with the formation time of traps. Compared with the Kuqa Depression of Tarim Basin, natural gas sources are better in the southern margin of Junggar Basin, and the geologic conditions are favorable for the formation of large oil and gas fields in the southern margin of Junggar Basin. The deep Permian-Jurassic-Cretaceous petroleum system is the most favorable petroleum system for natural gas exploration in the southern margin of Junggar Basin. The western part and the central part of the southern margin in the Junggar Basin could be the first targets for the discovery of the Jurassic coal-derived oil and gas reservoirs. The shallow Cretaceous-Neogene petroleum system is the second target for natural gas exploration.https://www.frontiersin.org/articles/10.3389/feart.2021.635230/fullsouthern margin of Junggar Basinnatural gasgenetic type of natural gasJurassic coal measuresnatural gas accumulationfavorable exploration target |
| spellingShingle | Jianping Chen Xulong Wang Yongge Sun Yunyan Ni Baoli Xiang Jiande Liao Factors Controlling Natural Gas Accumulation in the Southern Margin of Junggar Basin and Potential Exploration Targets Frontiers in Earth Science southern margin of Junggar Basin natural gas genetic type of natural gas Jurassic coal measures natural gas accumulation favorable exploration target |
| title | Factors Controlling Natural Gas Accumulation in the Southern Margin of Junggar Basin and Potential Exploration Targets |
| title_full | Factors Controlling Natural Gas Accumulation in the Southern Margin of Junggar Basin and Potential Exploration Targets |
| title_fullStr | Factors Controlling Natural Gas Accumulation in the Southern Margin of Junggar Basin and Potential Exploration Targets |
| title_full_unstemmed | Factors Controlling Natural Gas Accumulation in the Southern Margin of Junggar Basin and Potential Exploration Targets |
| title_short | Factors Controlling Natural Gas Accumulation in the Southern Margin of Junggar Basin and Potential Exploration Targets |
| title_sort | factors controlling natural gas accumulation in the southern margin of junggar basin and potential exploration targets |
| topic | southern margin of Junggar Basin natural gas genetic type of natural gas Jurassic coal measures natural gas accumulation favorable exploration target |
| url | https://www.frontiersin.org/articles/10.3389/feart.2021.635230/full |
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