Optimization of segmented fracturing parameters for coalbed methane horizontal wells based on comprehensive fracability index
The coal seams in the Shizhuang block of the Qinshui Basin are characterized by developed cleats, low permeability, soft coal structures, and strong heterogeneity. In earlier development stages, hydraulic segmented fracturing of horizontal wells resulted in significant variations in gas production p...
Saved in:
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Petroleum Reservoir Evaluation and Development
2024-12-01
|
| Series: | Youqicang pingjia yu kaifa |
| Subjects: | |
| Online Access: | https://red.magtech.org.cn/fileup/2095-1426/PDF/1733807779695-978601469.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849696995368763392 |
|---|---|
| author | KONG Xiangwei, XIE Xin, WANG Cunwu |
| author_facet | KONG Xiangwei, XIE Xin, WANG Cunwu |
| author_sort | KONG Xiangwei, XIE Xin, WANG Cunwu |
| collection | DOAJ |
| description | The coal seams in the Shizhuang block of the Qinshui Basin are characterized by developed cleats, low permeability, soft coal structures, and strong heterogeneity. In earlier development stages, hydraulic segmented fracturing of horizontal wells resulted in significant variations in gas production per well, with unclear relationships between gas well productivity and fracturing parameters. This led to poor economic performance in coalbed methane（CBM） development, highlighting the need for optimization of horizontal well fracturing parameters. This study established a comprehensive fracability index（CFI） evaluation model based on coal seam brittleness, in-situ stress, and reservoir-seepage characteristics. Considering the impact of stress shadows during horizontal well fracturing, stress shadow and fracture interference charts were generated for different coal seam structures, clarifying the effects of net pressure, fracture length, spacing, and cluster number on induced stress. Based on the economic requirements for CBM development, the fracturing positions and segment design parameters of horizontal wells with different CFI values were optimized by considering the relationship between the internal rate of return (IRR) of single-well investment and daily gas production. A high-efficiency fracturing technology chart for horizontal wells was developed, aimed at improving the fracturing effectiveness in the Shizhuang block of Qinshui Basin and enhancing the quality and efficiency of CBM exploration and development. |
| format | Article |
| id | doaj-art-78bc7e9e25d54e578cbcf6cc16704f78 |
| institution | DOAJ |
| issn | 2095-1426 |
| language | zho |
| publishDate | 2024-12-01 |
| publisher | Editorial Department of Petroleum Reservoir Evaluation and Development |
| record_format | Article |
| series | Youqicang pingjia yu kaifa |
| spelling | doaj-art-78bc7e9e25d54e578cbcf6cc16704f782025-08-20T03:19:18ZzhoEditorial Department of Petroleum Reservoir Evaluation and DevelopmentYouqicang pingjia yu kaifa2095-14262024-12-0114692593210.13809/j.cnki.cn32-1825/te.2024.06.014Optimization of segmented fracturing parameters for coalbed methane horizontal wells based on comprehensive fracability indexKONG Xiangwei, XIE Xin, WANG Cunwu01. School of Petroleum Engineering, Yangtze University, Wuhan, Hubei 430100, China;2. Hubei Key Laboratory of Drilling and Production Engineering for Oil and Gas, Yangtze University, Wuhan, Hubei 430100, China;3. CNOOC Research Institute Co., Ltd., Beijing 100028, ChinaThe coal seams in the Shizhuang block of the Qinshui Basin are characterized by developed cleats, low permeability, soft coal structures, and strong heterogeneity. In earlier development stages, hydraulic segmented fracturing of horizontal wells resulted in significant variations in gas production per well, with unclear relationships between gas well productivity and fracturing parameters. This led to poor economic performance in coalbed methane（CBM） development, highlighting the need for optimization of horizontal well fracturing parameters. This study established a comprehensive fracability index（CFI） evaluation model based on coal seam brittleness, in-situ stress, and reservoir-seepage characteristics. Considering the impact of stress shadows during horizontal well fracturing, stress shadow and fracture interference charts were generated for different coal seam structures, clarifying the effects of net pressure, fracture length, spacing, and cluster number on induced stress. Based on the economic requirements for CBM development, the fracturing positions and segment design parameters of horizontal wells with different CFI values were optimized by considering the relationship between the internal rate of return (IRR) of single-well investment and daily gas production. A high-efficiency fracturing technology chart for horizontal wells was developed, aimed at improving the fracturing effectiveness in the Shizhuang block of Qinshui Basin and enhancing the quality and efficiency of CBM exploration and development.https://red.magtech.org.cn/fileup/2095-1426/PDF/1733807779695-978601469.pdf|coalbed methane|horizontal well|hydraulic fracturing|fracability index|fracturing location|internal rate of return |
| spellingShingle | KONG Xiangwei, XIE Xin, WANG Cunwu Optimization of segmented fracturing parameters for coalbed methane horizontal wells based on comprehensive fracability index Youqicang pingjia yu kaifa |coalbed methane|horizontal well|hydraulic fracturing|fracability index|fracturing location|internal rate of return |
| title | Optimization of segmented fracturing parameters for coalbed methane horizontal wells based on comprehensive fracability index |
| title_full | Optimization of segmented fracturing parameters for coalbed methane horizontal wells based on comprehensive fracability index |
| title_fullStr | Optimization of segmented fracturing parameters for coalbed methane horizontal wells based on comprehensive fracability index |
| title_full_unstemmed | Optimization of segmented fracturing parameters for coalbed methane horizontal wells based on comprehensive fracability index |
| title_short | Optimization of segmented fracturing parameters for coalbed methane horizontal wells based on comprehensive fracability index |
| title_sort | optimization of segmented fracturing parameters for coalbed methane horizontal wells based on comprehensive fracability index |
| topic | |coalbed methane|horizontal well|hydraulic fracturing|fracability index|fracturing location|internal rate of return |
| url | https://red.magtech.org.cn/fileup/2095-1426/PDF/1733807779695-978601469.pdf |
| work_keys_str_mv | AT kongxiangweixiexinwangcunwu optimizationofsegmentedfracturingparametersforcoalbedmethanehorizontalwellsbasedoncomprehensivefracabilityindex |