Research on multi-scale digital core construction of carbonate rock with fractures and caves characteristics: a case study of Dengying formation carbonate rocks in Sichuan Basin
Carbonate reservoirs characterized by fractures and caves exhibit a complex spatial distribution and significant heterogeneity. The establishment of precise and reliable three-dimensional geological models is imperative to elucidate the influence mechanism of fracture and cave parameters on macrosco...
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Frontiers Media S.A.
2025-04-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2025.1528829/full |
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| author | Geli Li Jianbin Zhao Yuejiao Liu Zhanshan Xiao Shitao Cui Bo Wei Chenjun Zhang Yakun Mao Yang Xia Lei Xu Jianmeng Sun Zuzhi Hu |
| author_facet | Geli Li Jianbin Zhao Yuejiao Liu Zhanshan Xiao Shitao Cui Bo Wei Chenjun Zhang Yakun Mao Yang Xia Lei Xu Jianmeng Sun Zuzhi Hu |
| author_sort | Geli Li |
| collection | DOAJ |
| description | Carbonate reservoirs characterized by fractures and caves exhibit a complex spatial distribution and significant heterogeneity. The establishment of precise and reliable three-dimensional geological models is imperative to elucidate the influence mechanism of fracture and cave parameters on macroscopic petrophysical properties from a micro scale. This is the foundation and prerequisite for the efficient development of such reservoirs. In this paper, dual-scale CT core scanning data is utilized to adjust the segmentation threshold of high-resolution (small-scale) cores to the segmentation of low-resolution (large-scale) cores. This approach enables the comprehensive characterization of multi-scale porosity in large-scale cores and the realization of multi-scale digital core fusion. A 3D fracture digital core model was generated using a Slice-GAN neural network model and SEM images. A well-developed cave was extracted from low-resolution CT data and used as a cave digital core. Through model superposition, a multi-scale digital core containing fractures and caves was constructed. The reliability of the constructed digital core was verified based on four parameters: aperture distribution, coordination number, porosity, and resistivity. The research outcomes establish a foundation for subsequent simulations, which aim to assess the resistivity response of the digital core under varied fracture size, angle, and cave size conditions. This provides a technical foundation for advancing the fundamental theoretical research of carbonate rocks. |
| format | Article |
| id | doaj-art-a81b4381bbe246e2805a7fd082da2764 |
| institution | OA Journals |
| issn | 2296-6463 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj-art-a81b4381bbe246e2805a7fd082da27642025-08-20T02:13:03ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632025-04-011310.3389/feart.2025.15288291528829Research on multi-scale digital core construction of carbonate rock with fractures and caves characteristics: a case study of Dengying formation carbonate rocks in Sichuan BasinGeli Li0Jianbin Zhao1Yuejiao Liu2Zhanshan Xiao3Shitao Cui4Bo Wei5Chenjun Zhang6Yakun Mao7Yang Xia8Lei Xu9Jianmeng Sun10Zuzhi Hu11China Petroleum Logging Company Limited, Xi’an, Shaanxi, ChinaChina Petroleum Logging Company Limited, Xi’an, Shaanxi, ChinaSchool of Geosciences, China University of Petroleum, Qingdao, Shandong, ChinaChina Petroleum Logging Company Limited, Xi’an, Shaanxi, ChinaChina Petroleum Logging Company Limited, Xi’an, Shaanxi, ChinaChina Petroleum Logging Company Limited, Xi’an, Shaanxi, ChinaChina Petroleum Logging Company Limited, Xi’an, Shaanxi, ChinaChina Petroleum Logging Company Limited, Xi’an, Shaanxi, ChinaChina Petroleum Logging Company Limited, Xi’an, Shaanxi, ChinaSchool of Geosciences, China University of Petroleum, Qingdao, Shandong, ChinaSchool of Geosciences, China University of Petroleum, Qingdao, Shandong, ChinaChina Petroleum Logging Company Limited, Xi’an, Shaanxi, ChinaCarbonate reservoirs characterized by fractures and caves exhibit a complex spatial distribution and significant heterogeneity. The establishment of precise and reliable three-dimensional geological models is imperative to elucidate the influence mechanism of fracture and cave parameters on macroscopic petrophysical properties from a micro scale. This is the foundation and prerequisite for the efficient development of such reservoirs. In this paper, dual-scale CT core scanning data is utilized to adjust the segmentation threshold of high-resolution (small-scale) cores to the segmentation of low-resolution (large-scale) cores. This approach enables the comprehensive characterization of multi-scale porosity in large-scale cores and the realization of multi-scale digital core fusion. A 3D fracture digital core model was generated using a Slice-GAN neural network model and SEM images. A well-developed cave was extracted from low-resolution CT data and used as a cave digital core. Through model superposition, a multi-scale digital core containing fractures and caves was constructed. The reliability of the constructed digital core was verified based on four parameters: aperture distribution, coordination number, porosity, and resistivity. The research outcomes establish a foundation for subsequent simulations, which aim to assess the resistivity response of the digital core under varied fracture size, angle, and cave size conditions. This provides a technical foundation for advancing the fundamental theoretical research of carbonate rocks.https://www.frontiersin.org/articles/10.3389/feart.2025.1528829/fullcarbonate rockmulti-scale digital coresfracturescavesresistivity |
| spellingShingle | Geli Li Jianbin Zhao Yuejiao Liu Zhanshan Xiao Shitao Cui Bo Wei Chenjun Zhang Yakun Mao Yang Xia Lei Xu Jianmeng Sun Zuzhi Hu Research on multi-scale digital core construction of carbonate rock with fractures and caves characteristics: a case study of Dengying formation carbonate rocks in Sichuan Basin Frontiers in Earth Science carbonate rock multi-scale digital cores fractures caves resistivity |
| title | Research on multi-scale digital core construction of carbonate rock with fractures and caves characteristics: a case study of Dengying formation carbonate rocks in Sichuan Basin |
| title_full | Research on multi-scale digital core construction of carbonate rock with fractures and caves characteristics: a case study of Dengying formation carbonate rocks in Sichuan Basin |
| title_fullStr | Research on multi-scale digital core construction of carbonate rock with fractures and caves characteristics: a case study of Dengying formation carbonate rocks in Sichuan Basin |
| title_full_unstemmed | Research on multi-scale digital core construction of carbonate rock with fractures and caves characteristics: a case study of Dengying formation carbonate rocks in Sichuan Basin |
| title_short | Research on multi-scale digital core construction of carbonate rock with fractures and caves characteristics: a case study of Dengying formation carbonate rocks in Sichuan Basin |
| title_sort | research on multi scale digital core construction of carbonate rock with fractures and caves characteristics a case study of dengying formation carbonate rocks in sichuan basin |
| topic | carbonate rock multi-scale digital cores fractures caves resistivity |
| url | https://www.frontiersin.org/articles/10.3389/feart.2025.1528829/full |
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