Reservoir Characteristics of the Lower Silurian Longmaxi Shale in Zhaotong Region, Southern China
The lower Silurian Longmaxi Formation hosts a highly productive shale gas play in the Zhaotong region of southern China. According to core observation, X-ray diffraction analyses, and scanning electron microscopy (SEM) observations, the shale comprises primarily quartz, carbonate minerals, and clay...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2020/8872244 |
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| author | Chao Luo Nanxin Yin Hun Lin Xuanbo Gao Junlei Wang Hanqing Zhu |
| author_facet | Chao Luo Nanxin Yin Hun Lin Xuanbo Gao Junlei Wang Hanqing Zhu |
| author_sort | Chao Luo |
| collection | DOAJ |
| description | The lower Silurian Longmaxi Formation hosts a highly productive shale gas play in the Zhaotong region of southern China. According to core observation, X-ray diffraction analyses, and scanning electron microscopy (SEM) observations, the shale comprises primarily quartz, carbonate minerals, and clay minerals, with minor amounts of plagioclase, K-feldspar, and pyrite. The clay mineral content ranges from 15.0% to 46.1%, with an average of 29.3% in the Zhaotong region. Organic geochemical analyses show that the Longmaxi Formation has good potential for shale gas resources by calculating total organic carbon, vitrinite reflectance, and gas content. Scanning electron microscope images demonstrate that reservoir pore types in the Longmaxi shale include organic pores, interparticle pores, intercrystalline pores, intraparticle pores, and fractures. Reservoir distribution is controlled by lithofacies, mineral composition, and geochemical factors. In addition, we investigated the relationships between reservoir parameters and production from 15 individual wells in the Zhaotong region by correlation coefficients. As a result, the brittleness index, total organic carbon (TOC), porosity, and gas content were used to define high-quality reservoirs in the Longmaxi shale. Based on these criteria, we mapped the thickness and distribution of high-quality reservoirs in the Longmaxi Formation and selected highlighted several key sites for future exploration and development. |
| format | Article |
| id | doaj-art-af1e5c6cd0a849d5a41688ed29d23ecf |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-af1e5c6cd0a849d5a41688ed29d23ecf2025-02-03T06:46:46ZengWileyGeofluids1468-81151468-81232020-01-01202010.1155/2020/88722448872244Reservoir Characteristics of the Lower Silurian Longmaxi Shale in Zhaotong Region, Southern ChinaChao Luo0Nanxin Yin1Hun Lin2Xuanbo Gao3Junlei Wang4Hanqing Zhu5Chongqing University of Science & Technology, Chongqing 401331, ChinaChongqing University of Science & Technology, Chongqing 401331, ChinaChongqing University of Science & Technology, Chongqing 401331, ChinaChongqing University of Science & Technology, Chongqing 401331, ChinaResearch Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, ChinaResearch Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, ChinaThe lower Silurian Longmaxi Formation hosts a highly productive shale gas play in the Zhaotong region of southern China. According to core observation, X-ray diffraction analyses, and scanning electron microscopy (SEM) observations, the shale comprises primarily quartz, carbonate minerals, and clay minerals, with minor amounts of plagioclase, K-feldspar, and pyrite. The clay mineral content ranges from 15.0% to 46.1%, with an average of 29.3% in the Zhaotong region. Organic geochemical analyses show that the Longmaxi Formation has good potential for shale gas resources by calculating total organic carbon, vitrinite reflectance, and gas content. Scanning electron microscope images demonstrate that reservoir pore types in the Longmaxi shale include organic pores, interparticle pores, intercrystalline pores, intraparticle pores, and fractures. Reservoir distribution is controlled by lithofacies, mineral composition, and geochemical factors. In addition, we investigated the relationships between reservoir parameters and production from 15 individual wells in the Zhaotong region by correlation coefficients. As a result, the brittleness index, total organic carbon (TOC), porosity, and gas content were used to define high-quality reservoirs in the Longmaxi shale. Based on these criteria, we mapped the thickness and distribution of high-quality reservoirs in the Longmaxi Formation and selected highlighted several key sites for future exploration and development.http://dx.doi.org/10.1155/2020/8872244 |
| spellingShingle | Chao Luo Nanxin Yin Hun Lin Xuanbo Gao Junlei Wang Hanqing Zhu Reservoir Characteristics of the Lower Silurian Longmaxi Shale in Zhaotong Region, Southern China Geofluids |
| title | Reservoir Characteristics of the Lower Silurian Longmaxi Shale in Zhaotong Region, Southern China |
| title_full | Reservoir Characteristics of the Lower Silurian Longmaxi Shale in Zhaotong Region, Southern China |
| title_fullStr | Reservoir Characteristics of the Lower Silurian Longmaxi Shale in Zhaotong Region, Southern China |
| title_full_unstemmed | Reservoir Characteristics of the Lower Silurian Longmaxi Shale in Zhaotong Region, Southern China |
| title_short | Reservoir Characteristics of the Lower Silurian Longmaxi Shale in Zhaotong Region, Southern China |
| title_sort | reservoir characteristics of the lower silurian longmaxi shale in zhaotong region southern china |
| url | http://dx.doi.org/10.1155/2020/8872244 |
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