Types of lithofacies in the Lower Cambrian marine shale of the Northern Guizhou Region and their suitability for shale gas exploration
The lithofacies and thermal maturity of the over-mature Lower Cambrian marine shale in the Northern Guizhou Region, and their impacts on reservoir properties in this shale were analyzed by combining geochemistry, mineralogy, and gas adsorption methods. Ten lithofacies were identified, and the domina...
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KeAi Communications Co., Ltd.
2024-10-01
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| Series: | Natural Gas Industry B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352854024000718 |
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| author | Lingyun Zhao Peng Xia Yong Fu Ke Wang Yuliang Mou |
| author_facet | Lingyun Zhao Peng Xia Yong Fu Ke Wang Yuliang Mou |
| author_sort | Lingyun Zhao |
| collection | DOAJ |
| description | The lithofacies and thermal maturity of the over-mature Lower Cambrian marine shale in the Northern Guizhou Region, and their impacts on reservoir properties in this shale were analyzed by combining geochemistry, mineralogy, and gas adsorption methods. Ten lithofacies were identified, and the dominant lithofacies in the studied shale are lean-total organic carbon (TOC) argillaceous-rich siliceous shale (LTAS), medium-TOC siliceous shale (MTSS), and rich-TOC siliceous shale (RTSS). Since the gas generation potential of organic matter was weak, meso- and macro-pores were compressed or filled during the thermal evolution stage with a vitrinite reflectance (RO) range of 3.0%–4.0%. The controlling factors for methane adsorption capacity in the shale samples are significantly influenced by TOC content rather than thermal maturity. Among the RTSS, MTSS, and LTAS samples, RTSS exhibits the highest favorability for preserving hydrocarbon gas, followed by MTSS. The shale types in this study play a significant role in determining the properties of shale reservoirs, serving as an effective parameter for evaluating shale gas development potential. The RTSS and MTSS with a RO range of 2.0%–3.0% stand out as the most favorable target shale types for shale gas exploration and development. |
| format | Article |
| id | doaj-art-0b09304cb79f4a93bf44ec4569f04cf5 |
| institution | OA Journals |
| issn | 2352-8540 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Natural Gas Industry B |
| spelling | doaj-art-0b09304cb79f4a93bf44ec4569f04cf52025-08-20T02:18:48ZengKeAi Communications Co., Ltd.Natural Gas Industry B2352-85402024-10-0111546948110.1016/j.ngib.2024.09.006Types of lithofacies in the Lower Cambrian marine shale of the Northern Guizhou Region and their suitability for shale gas explorationLingyun Zhao0Peng Xia1Yong Fu2Ke Wang3Yuliang Mou4Resource and Environmental Engineering College, Guizhou University, Guiyang, 550025, China; Guizhou Academy of Petroleum Exploration and Development Engineering, Guiyang, 550081, ChinaResource and Environmental Engineering College, Guizhou University, Guiyang, 550025, China; Key Laboratory of Ministry and Education for Geological Resources and Environment, Guiyang, 550025, China; Corresponding author. Resource and Environmental Engineering College, Guizhou University, Guiyang, 550025, China.Resource and Environmental Engineering College, Guizhou University, Guiyang, 550025, China; Key Laboratory of Ministry and Education for Geological Resources and Environment, Guiyang, 550025, ChinaResource and Environmental Engineering College, Guizhou University, Guiyang, 550025, China; Key Laboratory of Ministry and Education for Geological Resources and Environment, Guiyang, 550025, ChinaResource and Environmental Engineering College, Guizhou University, Guiyang, 550025, China; Key Laboratory of Ministry and Education for Geological Resources and Environment, Guiyang, 550025, ChinaThe lithofacies and thermal maturity of the over-mature Lower Cambrian marine shale in the Northern Guizhou Region, and their impacts on reservoir properties in this shale were analyzed by combining geochemistry, mineralogy, and gas adsorption methods. Ten lithofacies were identified, and the dominant lithofacies in the studied shale are lean-total organic carbon (TOC) argillaceous-rich siliceous shale (LTAS), medium-TOC siliceous shale (MTSS), and rich-TOC siliceous shale (RTSS). Since the gas generation potential of organic matter was weak, meso- and macro-pores were compressed or filled during the thermal evolution stage with a vitrinite reflectance (RO) range of 3.0%–4.0%. The controlling factors for methane adsorption capacity in the shale samples are significantly influenced by TOC content rather than thermal maturity. Among the RTSS, MTSS, and LTAS samples, RTSS exhibits the highest favorability for preserving hydrocarbon gas, followed by MTSS. The shale types in this study play a significant role in determining the properties of shale reservoirs, serving as an effective parameter for evaluating shale gas development potential. The RTSS and MTSS with a RO range of 2.0%–3.0% stand out as the most favorable target shale types for shale gas exploration and development.http://www.sciencedirect.com/science/article/pii/S2352854024000718Shale gasLithofaciesReservoir propertiesEarly cambrianExploration significance |
| spellingShingle | Lingyun Zhao Peng Xia Yong Fu Ke Wang Yuliang Mou Types of lithofacies in the Lower Cambrian marine shale of the Northern Guizhou Region and their suitability for shale gas exploration Natural Gas Industry B Shale gas Lithofacies Reservoir properties Early cambrian Exploration significance |
| title | Types of lithofacies in the Lower Cambrian marine shale of the Northern Guizhou Region and their suitability for shale gas exploration |
| title_full | Types of lithofacies in the Lower Cambrian marine shale of the Northern Guizhou Region and their suitability for shale gas exploration |
| title_fullStr | Types of lithofacies in the Lower Cambrian marine shale of the Northern Guizhou Region and their suitability for shale gas exploration |
| title_full_unstemmed | Types of lithofacies in the Lower Cambrian marine shale of the Northern Guizhou Region and their suitability for shale gas exploration |
| title_short | Types of lithofacies in the Lower Cambrian marine shale of the Northern Guizhou Region and their suitability for shale gas exploration |
| title_sort | types of lithofacies in the lower cambrian marine shale of the northern guizhou region and their suitability for shale gas exploration |
| topic | Shale gas Lithofacies Reservoir properties Early cambrian Exploration significance |
| url | http://www.sciencedirect.com/science/article/pii/S2352854024000718 |
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