Complex fracture propagation model and plugging timing optimization for temporary plugging fracturing in naturally fractured shale
In this paper, a viscoelasticity-plastic damage constitutive equation for naturally fractured shale is deduced, coupling nonlinear tensile-shear mixed fracture mode. Dynamic perforation-erosion on fluid re-distribution among multi-clusters are considered as well. DFN-FEM (discrete fracture network c...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2023-02-01
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| Series: | Petroleum Exploration and Development |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1876380422603768 |
| _version_ | 1797903366028787712 |
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| author | Xuanhe TANG Haiyan ZHU Mingguang CHE Yonghui WANG |
| author_facet | Xuanhe TANG Haiyan ZHU Mingguang CHE Yonghui WANG |
| author_sort | Xuanhe TANG |
| collection | DOAJ |
| description | In this paper, a viscoelasticity-plastic damage constitutive equation for naturally fractured shale is deduced, coupling nonlinear tensile-shear mixed fracture mode. Dynamic perforation-erosion on fluid re-distribution among multi-clusters are considered as well. DFN-FEM (discrete fracture network combined with finite element method) was developed to simulate the multi-cluster complex fractures propagation within temporary plugging fracturing (TPF). Numerical results are matched with field injection and micro-seismic monitoring data. Based on geomechanical characteristics of Weiyuan deep shale gas reservoir in Sichuan Basin, SW China, a multi-cluster complex fractures propagation model is built for TPF. To study complex fractures propagation and the permeability-enhanced region evolution, intersecting and competition mechanisms between the fractures before and after TPF treatment are revealed. Simulation results show that: fracture from middle cluster is restricted by the fractures from side-clusters, and side-clusters plugging is benefit for multi fractures propagation in uniformity; optimized TPF timing should be delayed within a higher density or strike of natural fractures; Within a reservoir-featured natural fractures distribution, optimized TPF timing for most clustered method is 2/3 of total fluid injection time as the optimal plugging time under different clustering modes. |
| first_indexed | 2024-04-10T09:31:45Z |
| format | Article |
| id | doaj.art-3280dbfbcb4940e0bcb23896297a8fcd |
| institution | Directory Open Access Journal |
| issn | 1876-3804 |
| language | English |
| last_indexed | 2024-04-10T09:31:45Z |
| publishDate | 2023-02-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Petroleum Exploration and Development |
| spelling | doaj.art-3280dbfbcb4940e0bcb23896297a8fcd2023-02-19T04:25:28ZengKeAi Communications Co., Ltd.Petroleum Exploration and Development1876-38042023-02-01501152165Complex fracture propagation model and plugging timing optimization for temporary plugging fracturing in naturally fractured shaleXuanhe TANG0Haiyan ZHU1Mingguang CHE2Yonghui WANG3College of Energy, Chengdu University of Technology, Chengdu 610059, China; State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, ChinaCollege of Energy, Chengdu University of Technology, Chengdu 610059, China; State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China; Corresponding authorResearch Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, ChinaResearch Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, ChinaIn this paper, a viscoelasticity-plastic damage constitutive equation for naturally fractured shale is deduced, coupling nonlinear tensile-shear mixed fracture mode. Dynamic perforation-erosion on fluid re-distribution among multi-clusters are considered as well. DFN-FEM (discrete fracture network combined with finite element method) was developed to simulate the multi-cluster complex fractures propagation within temporary plugging fracturing (TPF). Numerical results are matched with field injection and micro-seismic monitoring data. Based on geomechanical characteristics of Weiyuan deep shale gas reservoir in Sichuan Basin, SW China, a multi-cluster complex fractures propagation model is built for TPF. To study complex fractures propagation and the permeability-enhanced region evolution, intersecting and competition mechanisms between the fractures before and after TPF treatment are revealed. Simulation results show that: fracture from middle cluster is restricted by the fractures from side-clusters, and side-clusters plugging is benefit for multi fractures propagation in uniformity; optimized TPF timing should be delayed within a higher density or strike of natural fractures; Within a reservoir-featured natural fractures distribution, optimized TPF timing for most clustered method is 2/3 of total fluid injection time as the optimal plugging time under different clustering modes.http://www.sciencedirect.com/science/article/pii/S1876380422603768shale gasnaturally fractured shaletemporary plugging fracturingfracture propagationplugging timingdiscrete fracture network |
| spellingShingle | Xuanhe TANG Haiyan ZHU Mingguang CHE Yonghui WANG Complex fracture propagation model and plugging timing optimization for temporary plugging fracturing in naturally fractured shale Petroleum Exploration and Development shale gas naturally fractured shale temporary plugging fracturing fracture propagation plugging timing discrete fracture network |
| title | Complex fracture propagation model and plugging timing optimization for temporary plugging fracturing in naturally fractured shale |
| title_full | Complex fracture propagation model and plugging timing optimization for temporary plugging fracturing in naturally fractured shale |
| title_fullStr | Complex fracture propagation model and plugging timing optimization for temporary plugging fracturing in naturally fractured shale |
| title_full_unstemmed | Complex fracture propagation model and plugging timing optimization for temporary plugging fracturing in naturally fractured shale |
| title_short | Complex fracture propagation model and plugging timing optimization for temporary plugging fracturing in naturally fractured shale |
| title_sort | complex fracture propagation model and plugging timing optimization for temporary plugging fracturing in naturally fractured shale |
| topic | shale gas naturally fractured shale temporary plugging fracturing fracture propagation plugging timing discrete fracture network |
| url | http://www.sciencedirect.com/science/article/pii/S1876380422603768 |
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