Coupling Relationship between Lithofacies and Brittleness of the Shale Oil Reservoir: A Case Study of the Shahejie Formation in the Raoyang Sag
Analyzing the characteristics of rock brittleness in low-permeability mudstone and shale (MS) formations is imperative for efficient hydraulic fracturing stimulation. Rock brittleness depends on the mineral composition, organic matter abundance, and bedding structure. Based on the MS from Shahejie F...
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2022/2729597 |
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| author | Zhaojing Song Junqian Li Xiaoyan Li Ketong Chen Chengyun Wang Peng Li Yongbo Wei Rixin Zhao Xiaocheng Wang Shasha Zhang Mengying Yan Haiyan Geng |
| author_facet | Zhaojing Song Junqian Li Xiaoyan Li Ketong Chen Chengyun Wang Peng Li Yongbo Wei Rixin Zhao Xiaocheng Wang Shasha Zhang Mengying Yan Haiyan Geng |
| author_sort | Zhaojing Song |
| collection | DOAJ |
| description | Analyzing the characteristics of rock brittleness in low-permeability mudstone and shale (MS) formations is imperative for efficient hydraulic fracturing stimulation. Rock brittleness depends on the mineral composition, organic matter abundance, and bedding structure. Based on the MS from Shahejie Formation mineral composition (clay mineral, felsic mineral, and calcareous mineral contents), total organic content, and bedding structure (laminated, laminar, and massive), six types of lithofacies were identified: clay-rich MS, felsic-rich MS, calcareous-rich MS, clay MS, felsic MS, and calcareous MS. The quartz, feldspar, calcite, and dolomite of the Shahejie Formation are brittle minerals. Consequently, lithofacies with high felsic and calcareous mineral contents are more brittle. In addition, laminated and laminar MS are also conducive to hydraulic fracturing. Therefore, laminated, organic-rich, and calcareous-rich MS are the dominant lithofacies for hydraulic fracturing in the Shahejie Formation. The lithofacies and brittleness index were predicted by the response characteristics between mineral compositions and logging curves. The 3521–3552 m section of well B11x is dominated by calcareous-rich MS with developed laminae, representing a favorable section for hydraulic fracturing. Fragile minerals and oil are widely developed in the lower part of the lower 1st member of the Shahejie Formation (Es1L) in the southwestern part of Zhaohuangzhuang-Suning, where hydraulic fracturing can be used to increase shale oil production. |
| format | Article |
| id | doaj-art-f739637521f441b6b8a5b9f6582e0f7f |
| institution | Kabale University |
| issn | 1468-8123 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-f739637521f441b6b8a5b9f6582e0f7f2025-02-03T01:04:45ZengWileyGeofluids1468-81232022-01-01202210.1155/2022/2729597Coupling Relationship between Lithofacies and Brittleness of the Shale Oil Reservoir: A Case Study of the Shahejie Formation in the Raoyang SagZhaojing Song0Junqian Li1Xiaoyan Li2Ketong Chen3Chengyun Wang4Peng Li5Yongbo Wei6Rixin Zhao7Xiaocheng Wang8Shasha Zhang9Mengying Yan10Haiyan Geng11Shandong Provincial Key Laboratory of Deep Oil and GasShandong Provincial Key Laboratory of Deep Oil and GasResearch Institute of Exploration and DevelopmentResearch Institute of Exploration and DevelopmentResearch Institute of Exploration and DevelopmentResearch Institute of Exploration and DevelopmentShandong Provincial Key Laboratory of Deep Oil and GasShandong Provincial Key Laboratory of Deep Oil and GasShandong Provincial Key Laboratory of Deep Oil and GasResearch Institute of Exploration and DevelopmentResearch Institute of Exploration and DevelopmentResearch Institute of Exploration and DevelopmentAnalyzing the characteristics of rock brittleness in low-permeability mudstone and shale (MS) formations is imperative for efficient hydraulic fracturing stimulation. Rock brittleness depends on the mineral composition, organic matter abundance, and bedding structure. Based on the MS from Shahejie Formation mineral composition (clay mineral, felsic mineral, and calcareous mineral contents), total organic content, and bedding structure (laminated, laminar, and massive), six types of lithofacies were identified: clay-rich MS, felsic-rich MS, calcareous-rich MS, clay MS, felsic MS, and calcareous MS. The quartz, feldspar, calcite, and dolomite of the Shahejie Formation are brittle minerals. Consequently, lithofacies with high felsic and calcareous mineral contents are more brittle. In addition, laminated and laminar MS are also conducive to hydraulic fracturing. Therefore, laminated, organic-rich, and calcareous-rich MS are the dominant lithofacies for hydraulic fracturing in the Shahejie Formation. The lithofacies and brittleness index were predicted by the response characteristics between mineral compositions and logging curves. The 3521–3552 m section of well B11x is dominated by calcareous-rich MS with developed laminae, representing a favorable section for hydraulic fracturing. Fragile minerals and oil are widely developed in the lower part of the lower 1st member of the Shahejie Formation (Es1L) in the southwestern part of Zhaohuangzhuang-Suning, where hydraulic fracturing can be used to increase shale oil production.http://dx.doi.org/10.1155/2022/2729597 |
| spellingShingle | Zhaojing Song Junqian Li Xiaoyan Li Ketong Chen Chengyun Wang Peng Li Yongbo Wei Rixin Zhao Xiaocheng Wang Shasha Zhang Mengying Yan Haiyan Geng Coupling Relationship between Lithofacies and Brittleness of the Shale Oil Reservoir: A Case Study of the Shahejie Formation in the Raoyang Sag Geofluids |
| title | Coupling Relationship between Lithofacies and Brittleness of the Shale Oil Reservoir: A Case Study of the Shahejie Formation in the Raoyang Sag |
| title_full | Coupling Relationship between Lithofacies and Brittleness of the Shale Oil Reservoir: A Case Study of the Shahejie Formation in the Raoyang Sag |
| title_fullStr | Coupling Relationship between Lithofacies and Brittleness of the Shale Oil Reservoir: A Case Study of the Shahejie Formation in the Raoyang Sag |
| title_full_unstemmed | Coupling Relationship between Lithofacies and Brittleness of the Shale Oil Reservoir: A Case Study of the Shahejie Formation in the Raoyang Sag |
| title_short | Coupling Relationship between Lithofacies and Brittleness of the Shale Oil Reservoir: A Case Study of the Shahejie Formation in the Raoyang Sag |
| title_sort | coupling relationship between lithofacies and brittleness of the shale oil reservoir a case study of the shahejie formation in the raoyang sag |
| url | http://dx.doi.org/10.1155/2022/2729597 |
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