Hydraulic fracture propagation characteristics of directional perforation fracturing in horizontal wells for deep coalbed methane
Deep coalbed methane resources exhibit favorable geological characteristics and significant exploration and development potential, offering a substantial foundation for China's strategy to enhance natural gas storage and production. Directional perforation fracturing of horizontal wells is wide...
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Editorial Office of Petroleum Geology and Experiment
2025-01-01
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| Series: | Shiyou shiyan dizhi |
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| Online Access: | https://www.sysydz.net/cn/article/doi/10.11781/sysydz2025010153 |
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| author | Shuxin HUANG Song LI Bo CHEN |
| author_facet | Shuxin HUANG Song LI Bo CHEN |
| author_sort | Shuxin HUANG |
| collection | DOAJ |
| description | Deep coalbed methane resources exhibit favorable geological characteristics and significant exploration and development potential, offering a substantial foundation for China's strategy to enhance natural gas storage and production. Directional perforation fracturing of horizontal wells is widely used as an important permeability enhancement technology for deep coalbed methane exploration. However, the mechanisms of hydraulic fracture initiation and propagation under the influence of geological and engineering factors remain unclear. To explore directional perforation fracturing characteristics in deep coal seams, a three-dimensional discrete lattice simulation algorithm was used to establish a numerical model. The paper studied the effects of geological and perforation parameters on fracturing difficulty, fracture morphology, and stimulated reservoir area (SRA). The results showed that, with the increase in elastic modulus, coal seam fracture pressure rose, and SRA and its variation coefficient increased gradually, which is conducive to long and narrow fracture formation. An increase in horizontal stress differences weakened the interaction between hydraulic fractures, reducing SRA while increasing its variation coefficient and fracture aperture. In addition, increasing perforation depth and diameter significantly reduced the fracture pressure in deep coal seams. Higher perforation depths greatly increased SRA, whereas larger perforation diameters decreased SRA, and its variation coefficient increased gradually. Perforation density had no significant impact on fracture pressure, but was positively correlated with SRA. The study suggests that for fracturing of structurally intact coal seams, increasing perforation depth and density while reducing perforation diameter can achieve better results. |
| format | Article |
| id | doaj-art-77a5beb45a004fa6a5e8ba1871861146 |
| institution | Kabale University |
| issn | 1001-6112 |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | Editorial Office of Petroleum Geology and Experiment |
| record_format | Article |
| series | Shiyou shiyan dizhi |
| spelling | doaj-art-77a5beb45a004fa6a5e8ba18718611462025-02-09T07:48:48ZzhoEditorial Office of Petroleum Geology and ExperimentShiyou shiyan dizhi1001-61122025-01-0147115316210.11781/sysydz2025010153sysydz-47-1-153Hydraulic fracture propagation characteristics of directional perforation fracturing in horizontal wells for deep coalbed methaneShuxin HUANG0Song LI1Bo CHEN2Oil and Gas Engineering Service Center, East China Oil and Gas Company, SINOPEC, Nanjing, Jiangsu 210004, ChinaSchool of Energy Resource, China University of Geosciences (Beijing), Beijing 100083, ChinaSchool of Energy Resource, China University of Geosciences (Beijing), Beijing 100083, ChinaDeep coalbed methane resources exhibit favorable geological characteristics and significant exploration and development potential, offering a substantial foundation for China's strategy to enhance natural gas storage and production. Directional perforation fracturing of horizontal wells is widely used as an important permeability enhancement technology for deep coalbed methane exploration. However, the mechanisms of hydraulic fracture initiation and propagation under the influence of geological and engineering factors remain unclear. To explore directional perforation fracturing characteristics in deep coal seams, a three-dimensional discrete lattice simulation algorithm was used to establish a numerical model. The paper studied the effects of geological and perforation parameters on fracturing difficulty, fracture morphology, and stimulated reservoir area (SRA). The results showed that, with the increase in elastic modulus, coal seam fracture pressure rose, and SRA and its variation coefficient increased gradually, which is conducive to long and narrow fracture formation. An increase in horizontal stress differences weakened the interaction between hydraulic fractures, reducing SRA while increasing its variation coefficient and fracture aperture. In addition, increasing perforation depth and diameter significantly reduced the fracture pressure in deep coal seams. Higher perforation depths greatly increased SRA, whereas larger perforation diameters decreased SRA, and its variation coefficient increased gradually. Perforation density had no significant impact on fracture pressure, but was positively correlated with SRA. The study suggests that for fracturing of structurally intact coal seams, increasing perforation depth and density while reducing perforation diameter can achieve better results.https://www.sysydz.net/cn/article/doi/10.11781/sysydz2025010153three-dimensional discrete lattice simulation algorithmgeological parametersperforation parametersdirectional perforation fracturinghydraulic fracturesdeep coalbed methane |
| spellingShingle | Shuxin HUANG Song LI Bo CHEN Hydraulic fracture propagation characteristics of directional perforation fracturing in horizontal wells for deep coalbed methane Shiyou shiyan dizhi three-dimensional discrete lattice simulation algorithm geological parameters perforation parameters directional perforation fracturing hydraulic fractures deep coalbed methane |
| title | Hydraulic fracture propagation characteristics of directional perforation fracturing in horizontal wells for deep coalbed methane |
| title_full | Hydraulic fracture propagation characteristics of directional perforation fracturing in horizontal wells for deep coalbed methane |
| title_fullStr | Hydraulic fracture propagation characteristics of directional perforation fracturing in horizontal wells for deep coalbed methane |
| title_full_unstemmed | Hydraulic fracture propagation characteristics of directional perforation fracturing in horizontal wells for deep coalbed methane |
| title_short | Hydraulic fracture propagation characteristics of directional perforation fracturing in horizontal wells for deep coalbed methane |
| title_sort | hydraulic fracture propagation characteristics of directional perforation fracturing in horizontal wells for deep coalbed methane |
| topic | three-dimensional discrete lattice simulation algorithm geological parameters perforation parameters directional perforation fracturing hydraulic fractures deep coalbed methane |
| url | https://www.sysydz.net/cn/article/doi/10.11781/sysydz2025010153 |
| work_keys_str_mv | AT shuxinhuang hydraulicfracturepropagationcharacteristicsofdirectionalperforationfracturinginhorizontalwellsfordeepcoalbedmethane AT songli hydraulicfracturepropagationcharacteristicsofdirectionalperforationfracturinginhorizontalwellsfordeepcoalbedmethane AT bochen hydraulicfracturepropagationcharacteristicsofdirectionalperforationfracturinginhorizontalwellsfordeepcoalbedmethane |