Slope Belts of Paleouplifts Control the Pore Structure of Organic Matter of Marine Shale: A Comparative Study of Lower Cambrian Rocks in the Sichuan Basin
Extensive exploration of the marine shale of the Niutitang Formation in south China has been conducted. However, exploration and development results have varied considerably in different areas. For example, the Niutitang shale in Jingyan City (Southwestern Sichuan Basin) produces a large amount of g...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/5517655 |
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| author | Pengfei Wang Chen Zhang Aoran Liu Pengfei Zhang Yibo Qiu Xin Li Shanshan Yu Shuqing Yao Sanyi Liu Zhenxue Jiang |
| author_facet | Pengfei Wang Chen Zhang Aoran Liu Pengfei Zhang Yibo Qiu Xin Li Shanshan Yu Shuqing Yao Sanyi Liu Zhenxue Jiang |
| author_sort | Pengfei Wang |
| collection | DOAJ |
| description | Extensive exploration of the marine shale of the Niutitang Formation in south China has been conducted. However, exploration and development results have varied considerably in different areas. For example, the Niutitang shale in Jingyan City (Southwestern Sichuan Basin) produces a large amount of gas with a long period of stable production. In contrast, most development wells in the Niutitang shale in Chongqing City do not produce gas. Scanning electron microscopy images showed that the organic matter (OM) pore development in the Niutitang shale in Jingyan is abundant, large in size, and are well connected. In contrast, OM pores in the Niutitang shale in Chongqing are rarely observed. OM pore development of the Jingyan and Chongqing shales is mainly controlled by thermal maturity as shown by equivalent vitrine reflectance determinations. The moderate thermal maturity has resulted in the development of a large number of OM pores in the Niutitang shale in Jingyan, whereas the high thermal maturity of the Niutitang shale in Chongqing has led to the destruction of most of the OM pores. Due to the existence of ancient uplift, the shale was buried shallowly in the process of hydrocarbon generation evolution, and the shale avoided excessive thermal evolution and retained appropriate thermal maturity. In the Jingyan area, due to its location near the central uplift in the Sichuan Basin, the Niutitang shale deposited nearby avoided excessive evolution, and a large number of OM pores were retained in the reservoir. |
| format | Article |
| id | doaj-art-2a18c04282db4e699147e32338ccdd9d |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-2a18c04282db4e699147e32338ccdd9d2025-08-20T03:54:37ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/55176555517655Slope Belts of Paleouplifts Control the Pore Structure of Organic Matter of Marine Shale: A Comparative Study of Lower Cambrian Rocks in the Sichuan BasinPengfei Wang0Chen Zhang1Aoran Liu2Pengfei Zhang3Yibo Qiu4Xin Li5Shanshan Yu6Shuqing Yao7Sanyi Liu8Zhenxue Jiang9Geoscience Documentation Center of China Geological Survey, Beijing 100083, ChinaState Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing, ChinaHebei Key Laboratory of Strategic Critical Mineral Resources, Hebei GEO University, Shijiazhuang 050031, ChinaResearch Institute of Exploration and Development, Sinopec Shengli Oilfield Company, Dongying 257000, ChinaResearch Institute of Exploration and Development, Sinopec Shengli Oilfield Company, Dongying 257000, ChinaChina National Offshore Oil Corporation Research Institute, Beijing 100028, ChinaChina National Offshore Oil Corporation Research Institute, Beijing 100028, ChinaGeoscience Documentation Center of China Geological Survey, Beijing 100083, ChinaGeoscience Documentation Center of China Geological Survey, Beijing 100083, ChinaState Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing, ChinaExtensive exploration of the marine shale of the Niutitang Formation in south China has been conducted. However, exploration and development results have varied considerably in different areas. For example, the Niutitang shale in Jingyan City (Southwestern Sichuan Basin) produces a large amount of gas with a long period of stable production. In contrast, most development wells in the Niutitang shale in Chongqing City do not produce gas. Scanning electron microscopy images showed that the organic matter (OM) pore development in the Niutitang shale in Jingyan is abundant, large in size, and are well connected. In contrast, OM pores in the Niutitang shale in Chongqing are rarely observed. OM pore development of the Jingyan and Chongqing shales is mainly controlled by thermal maturity as shown by equivalent vitrine reflectance determinations. The moderate thermal maturity has resulted in the development of a large number of OM pores in the Niutitang shale in Jingyan, whereas the high thermal maturity of the Niutitang shale in Chongqing has led to the destruction of most of the OM pores. Due to the existence of ancient uplift, the shale was buried shallowly in the process of hydrocarbon generation evolution, and the shale avoided excessive thermal evolution and retained appropriate thermal maturity. In the Jingyan area, due to its location near the central uplift in the Sichuan Basin, the Niutitang shale deposited nearby avoided excessive evolution, and a large number of OM pores were retained in the reservoir.http://dx.doi.org/10.1155/2021/5517655 |
| spellingShingle | Pengfei Wang Chen Zhang Aoran Liu Pengfei Zhang Yibo Qiu Xin Li Shanshan Yu Shuqing Yao Sanyi Liu Zhenxue Jiang Slope Belts of Paleouplifts Control the Pore Structure of Organic Matter of Marine Shale: A Comparative Study of Lower Cambrian Rocks in the Sichuan Basin Geofluids |
| title | Slope Belts of Paleouplifts Control the Pore Structure of Organic Matter of Marine Shale: A Comparative Study of Lower Cambrian Rocks in the Sichuan Basin |
| title_full | Slope Belts of Paleouplifts Control the Pore Structure of Organic Matter of Marine Shale: A Comparative Study of Lower Cambrian Rocks in the Sichuan Basin |
| title_fullStr | Slope Belts of Paleouplifts Control the Pore Structure of Organic Matter of Marine Shale: A Comparative Study of Lower Cambrian Rocks in the Sichuan Basin |
| title_full_unstemmed | Slope Belts of Paleouplifts Control the Pore Structure of Organic Matter of Marine Shale: A Comparative Study of Lower Cambrian Rocks in the Sichuan Basin |
| title_short | Slope Belts of Paleouplifts Control the Pore Structure of Organic Matter of Marine Shale: A Comparative Study of Lower Cambrian Rocks in the Sichuan Basin |
| title_sort | slope belts of paleouplifts control the pore structure of organic matter of marine shale a comparative study of lower cambrian rocks in the sichuan basin |
| url | http://dx.doi.org/10.1155/2021/5517655 |
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