Method for identification of fractures in shale gas horizontal wells in eastern Sichuan Basin and its application
The relationship between fractures and gas logging in Nanchuan-Wulong area in eastern Sichuan Basin is utilized to study the identification of fractures in shale gas horizontal wells based on geological (core), imaging logging, logging evaluation, seismic prediction, and other data. First, to solve...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
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Editorial Office of Petroleum Geology and Experiment
2023-11-01
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| Series: | Shiyou shiyan dizhi |
| Subjects: | |
| Online Access: | https://www.sysydz.net/cn/article/doi/10.11781/sysydz2023061196 |
| _version_ | 1797277440282722304 |
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| author | Yongmin PENG Shixiong DONG Ruikang BIAN Wei DU Hui QIAO Zengqin LIU |
| author_facet | Yongmin PENG Shixiong DONG Ruikang BIAN Wei DU Hui QIAO Zengqin LIU |
| author_sort | Yongmin PENG |
| collection | DOAJ |
| description | The relationship between fractures and gas logging in Nanchuan-Wulong area in eastern Sichuan Basin is utilized to study the identification of fractures in shale gas horizontal wells based on geological (core), imaging logging, logging evaluation, seismic prediction, and other data. First, to solve the problems of lack of core and imaging logging and difficulty in identifying natural fractures in shale gas horizontal wells, a core scale shale natural-fracture identification model is established through vertical wells from a geological perspective in this paper, and the development of high angle fractures in the core is consistent with the high values and peaks of total hydrocarbon anomalies. Second, in combination with the fracture identification mode, the fracture development section of non-coring vertical wells can be quickly and qualitatively identified at a low cost based on total hydrocarbon information. There will be a sudden increase in the total hydrocarbon value in the fracture development section, especially in the shale section with low total organic carbon (TOC). The sudden increase in the total hydrocarbon value also represents the existence of fractures. Finally, the plate method of TOC and normalized total hydrocarbon correlation is used to quantitatively identify vertical and horizontal well fracture sections without coring and imaging logging data. The area delineated by a normalized total hydrocarbon value ≥0.4 and TOC ≥0.5% are considered as the fracture development section of a horizontal well. Based on the identified horizontal well fracture section, from the perspective of geological engineering integration, it is possible to avoid or pay attention to these densely developed large or giant fractures in advance, thereby increasing the production of a single well. |
| first_indexed | 2024-03-07T15:48:28Z |
| format | Article |
| id | doaj.art-6830dde6b11d4008998e4110f184a30a |
| institution | Directory Open Access Journal |
| issn | 1001-6112 |
| language | zho |
| last_indexed | 2024-03-07T15:48:28Z |
| publishDate | 2023-11-01 |
| publisher | Editorial Office of Petroleum Geology and Experiment |
| record_format | Article |
| series | Shiyou shiyan dizhi |
| spelling | doaj.art-6830dde6b11d4008998e4110f184a30a2024-03-05T03:12:30ZzhoEditorial Office of Petroleum Geology and ExperimentShiyou shiyan dizhi1001-61122023-11-014561196120310.11781/sysydz2023061196sysydz-45-6-1196Method for identification of fractures in shale gas horizontal wells in eastern Sichuan Basin and its applicationYongmin PENG0Shixiong DONG1Ruikang BIAN2Wei DU3Hui QIAO4Zengqin LIU5SINOPEC Petroleum Exploration and Production Research Institute, Beijing 102206, ChinaSINOPEC Petroleum Exploration and Production Research Institute, Beijing 102206, ChinaSINOPEC Petroleum Exploration and Production Research Institute, Beijing 102206, ChinaSINOPEC Petroleum Exploration and Production Research Institute, Beijing 102206, ChinaSINOPEC Petroleum Exploration and Production Research Institute, Beijing 102206, ChinaSINOPEC Petroleum Exploration and Production Research Institute, Beijing 102206, ChinaThe relationship between fractures and gas logging in Nanchuan-Wulong area in eastern Sichuan Basin is utilized to study the identification of fractures in shale gas horizontal wells based on geological (core), imaging logging, logging evaluation, seismic prediction, and other data. First, to solve the problems of lack of core and imaging logging and difficulty in identifying natural fractures in shale gas horizontal wells, a core scale shale natural-fracture identification model is established through vertical wells from a geological perspective in this paper, and the development of high angle fractures in the core is consistent with the high values and peaks of total hydrocarbon anomalies. Second, in combination with the fracture identification mode, the fracture development section of non-coring vertical wells can be quickly and qualitatively identified at a low cost based on total hydrocarbon information. There will be a sudden increase in the total hydrocarbon value in the fracture development section, especially in the shale section with low total organic carbon (TOC). The sudden increase in the total hydrocarbon value also represents the existence of fractures. Finally, the plate method of TOC and normalized total hydrocarbon correlation is used to quantitatively identify vertical and horizontal well fracture sections without coring and imaging logging data. The area delineated by a normalized total hydrocarbon value ≥0.4 and TOC ≥0.5% are considered as the fracture development section of a horizontal well. Based on the identified horizontal well fracture section, from the perspective of geological engineering integration, it is possible to avoid or pay attention to these densely developed large or giant fractures in advance, thereby increasing the production of a single well.https://www.sysydz.net/cn/article/doi/10.11781/sysydz2023061196natural cracksnormalized total hydrocarbonplate methodhorizontal wellshale gaseastern sichuan basin |
| spellingShingle | Yongmin PENG Shixiong DONG Ruikang BIAN Wei DU Hui QIAO Zengqin LIU Method for identification of fractures in shale gas horizontal wells in eastern Sichuan Basin and its application Shiyou shiyan dizhi natural cracks normalized total hydrocarbon plate method horizontal well shale gas eastern sichuan basin |
| title | Method for identification of fractures in shale gas horizontal wells in eastern Sichuan Basin and its application |
| title_full | Method for identification of fractures in shale gas horizontal wells in eastern Sichuan Basin and its application |
| title_fullStr | Method for identification of fractures in shale gas horizontal wells in eastern Sichuan Basin and its application |
| title_full_unstemmed | Method for identification of fractures in shale gas horizontal wells in eastern Sichuan Basin and its application |
| title_short | Method for identification of fractures in shale gas horizontal wells in eastern Sichuan Basin and its application |
| title_sort | method for identification of fractures in shale gas horizontal wells in eastern sichuan basin and its application |
| topic | natural cracks normalized total hydrocarbon plate method horizontal well shale gas eastern sichuan basin |
| url | https://www.sysydz.net/cn/article/doi/10.11781/sysydz2023061196 |
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