Lithofacies paleogeography and sedimentary model of Sinian Dengying Fm in the Sichuan Basin
For predicting the distribution of favorable reservoir facies belts of the super-large ancient Anyue carbonate gas field in the Sichuan Basin, through an analysis of structure and lithofacies paleogeography, the lithofacies paleogeography and sedimentary model of the Sinian Dengying Fm was reconstru...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2017-05-01
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| Series: | Natural Gas Industry B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352854017300876 |
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| author | Jingao Zhou Jianyong Zhang Hongying Deng Yana Chen Yi Hao Wenzheng Li Mingfeng Gu Xianying Luo |
| author_facet | Jingao Zhou Jianyong Zhang Hongying Deng Yana Chen Yi Hao Wenzheng Li Mingfeng Gu Xianying Luo |
| author_sort | Jingao Zhou |
| collection | DOAJ |
| description | For predicting the distribution of favorable reservoir facies belts of the super-large ancient Anyue carbonate gas field in the Sichuan Basin, through an analysis of structure and lithofacies paleogeography, the lithofacies paleogeography and sedimentary model of the Sinian Dengying Fm was reconstructed based on the field outcrop, drilling and seismic data. As a result, achievements are made in four aspects. First, the basin and its periphery resided in an extensional tectonic setting in the Sinian. Intense extension led to the formation of the Deyang–Anyue intra-platform rift. The Sichuan Basin was divided into the palaeo-geographic pattern of “two uplifts and four sags”. The “two uplifts” evolved into the platform, and the “four sags” evolved into the slope-basin environment. Second, in the depositional stage of the Deng 2 Member, some favorable reservoir belts developed, such as bioherm-shoal at the continental margin, bioherm-shoal at the rift margin, and bioherm-shoal in the platform. The bioherm-shoal at rift margin developed along both sides of the Deyang–Anyue rift, in a U-shape, with a width of about 5–40 km and a length of about 500 km. It connected with the platform margin belt at the continental margin to the west in the Shifang area, and to the north near Guangyuan area. Third, in the depositional stage of the Deng 4 Member, when the lithofacies paleogeographic features in the Deng 2 Member remained, the platform margin belt at the rift margin evolved into two parts in the east and the west as a result of the continuous southward extensional faulting of the Deyang–Anyue rift until it finally crossed the basin from north to south. The eastern platform margin belt was located in the Guangyuan–Yanting–Anyue–Luzhou area, showing NS distribution with a length of about 450 km and a width of about 4–50 km. The western platform margin belt mainly developed in the Dujiangyan–Chengdu–Weiyuan–Yibin–Mabian area, showing an eastward arc distribution with a length of about 300 km and a width of 4–30 km. And fourth, the sedimentary model of rimmed platform with double platform margins in the Dengying Fm was established, providing a guidance for predicting the distribution of favorable reservoir facies belts. |
| first_indexed | 2024-03-07T17:38:20Z |
| format | Article |
| id | doaj.art-d078f54ede3549899f0f9c365efd96d6 |
| institution | Directory Open Access Journal |
| issn | 2352-8540 |
| language | English |
| last_indexed | 2024-03-07T17:38:20Z |
| publishDate | 2017-05-01 |
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| series | Natural Gas Industry B |
| spelling | doaj.art-d078f54ede3549899f0f9c365efd96d62024-03-02T16:25:48ZengKeAi Communications Co., Ltd.Natural Gas Industry B2352-85402017-05-014321722410.1016/j.ngib.2017.07.023Lithofacies paleogeography and sedimentary model of Sinian Dengying Fm in the Sichuan BasinJingao Zhou0Jianyong Zhang1Hongying Deng2Yana Chen3Yi Hao4Wenzheng Li5Mingfeng Gu6Xianying Luo7PetroChina Hangzhou Research Institute of Geology, Hangzhou, Zhejiang 310023, ChinaPetroChina Hangzhou Research Institute of Geology, Hangzhou, Zhejiang 310023, ChinaPetroChina Hangzhou Research Institute of Geology, Hangzhou, Zhejiang 310023, ChinaPetroChina Hangzhou Research Institute of Geology, Hangzhou, Zhejiang 310023, ChinaPetroChina Hangzhou Research Institute of Geology, Hangzhou, Zhejiang 310023, ChinaPetroChina Hangzhou Research Institute of Geology, Hangzhou, Zhejiang 310023, ChinaPetroChina Hangzhou Research Institute of Geology, Hangzhou, Zhejiang 310023, ChinaPetroChina Hangzhou Research Institute of Geology, Hangzhou, Zhejiang 310023, ChinaFor predicting the distribution of favorable reservoir facies belts of the super-large ancient Anyue carbonate gas field in the Sichuan Basin, through an analysis of structure and lithofacies paleogeography, the lithofacies paleogeography and sedimentary model of the Sinian Dengying Fm was reconstructed based on the field outcrop, drilling and seismic data. As a result, achievements are made in four aspects. First, the basin and its periphery resided in an extensional tectonic setting in the Sinian. Intense extension led to the formation of the Deyang–Anyue intra-platform rift. The Sichuan Basin was divided into the palaeo-geographic pattern of “two uplifts and four sags”. The “two uplifts” evolved into the platform, and the “four sags” evolved into the slope-basin environment. Second, in the depositional stage of the Deng 2 Member, some favorable reservoir belts developed, such as bioherm-shoal at the continental margin, bioherm-shoal at the rift margin, and bioherm-shoal in the platform. The bioherm-shoal at rift margin developed along both sides of the Deyang–Anyue rift, in a U-shape, with a width of about 5–40 km and a length of about 500 km. It connected with the platform margin belt at the continental margin to the west in the Shifang area, and to the north near Guangyuan area. Third, in the depositional stage of the Deng 4 Member, when the lithofacies paleogeographic features in the Deng 2 Member remained, the platform margin belt at the rift margin evolved into two parts in the east and the west as a result of the continuous southward extensional faulting of the Deyang–Anyue rift until it finally crossed the basin from north to south. The eastern platform margin belt was located in the Guangyuan–Yanting–Anyue–Luzhou area, showing NS distribution with a length of about 450 km and a width of about 4–50 km. The western platform margin belt mainly developed in the Dujiangyan–Chengdu–Weiyuan–Yibin–Mabian area, showing an eastward arc distribution with a length of about 300 km and a width of 4–30 km. And fourth, the sedimentary model of rimmed platform with double platform margins in the Dengying Fm was established, providing a guidance for predicting the distribution of favorable reservoir facies belts.http://www.sciencedirect.com/science/article/pii/S2352854017300876Sichuan BasinSinianDeyang–Anyue intra-platform riftLithofacies paleogeographySedimentary modelPlatform margin beltPlatform margin belt at the rift margin |
| spellingShingle | Jingao Zhou Jianyong Zhang Hongying Deng Yana Chen Yi Hao Wenzheng Li Mingfeng Gu Xianying Luo Lithofacies paleogeography and sedimentary model of Sinian Dengying Fm in the Sichuan Basin Natural Gas Industry B Sichuan Basin Sinian Deyang–Anyue intra-platform rift Lithofacies paleogeography Sedimentary model Platform margin belt Platform margin belt at the rift margin |
| title | Lithofacies paleogeography and sedimentary model of Sinian Dengying Fm in the Sichuan Basin |
| title_full | Lithofacies paleogeography and sedimentary model of Sinian Dengying Fm in the Sichuan Basin |
| title_fullStr | Lithofacies paleogeography and sedimentary model of Sinian Dengying Fm in the Sichuan Basin |
| title_full_unstemmed | Lithofacies paleogeography and sedimentary model of Sinian Dengying Fm in the Sichuan Basin |
| title_short | Lithofacies paleogeography and sedimentary model of Sinian Dengying Fm in the Sichuan Basin |
| title_sort | lithofacies paleogeography and sedimentary model of sinian dengying fm in the sichuan basin |
| topic | Sichuan Basin Sinian Deyang–Anyue intra-platform rift Lithofacies paleogeography Sedimentary model Platform margin belt Platform margin belt at the rift margin |
| url | http://www.sciencedirect.com/science/article/pii/S2352854017300876 |
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