Variation of induced stress field during hydraulic fracture closure and its influence on subsequent fracture
After the completion of multi-stage fracturing operation, the fluid pressure in artificial fracture network continues to decrease, resulting in the closure of fracture and the variation of local induced stress field. This process can also lead to the variation of fracture propagation pattern in the...
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Elsevier
2021
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oai:doaj.org-article:f2481f323f8f4d7c9cfab0327f53d1672021-11-26T04:34:27ZVariation of induced stress field during hydraulic fracture closure and its influence on subsequent fracture2352-484710.1016/j.egyr.2021.10.105https://doaj.org/article/f2481f323f8f4d7c9cfab0327f53d1672021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2352484721011240https://doaj.org/toc/2352-4847After the completion of multi-stage fracturing operation, the fluid pressure in artificial fracture network continues to decrease, resulting in the closure of fracture and the variation of local induced stress field. This process can also lead to the variation of fracture propagation pattern in the subsequent fracturing stages. To better guide fracturing design, the time effect of stress field was researched. A numerical method was used to solve the induced stress around a propped fracture, and analyze the influence of formation properties and treatment parameters on its change. Then, the characteristics of stress field with different closure times and its influence on subsequent fracture were investigated. Finally, the evolution of the stress field in two stimulated wells was analyzed using the instantaneous shut-in pressure. The results show that the original horizontal stress difference, fluid pressure in fracture, fracture length, fracture angle, and amount of proppant have significant effects on the variation of induced stress field. The stress field of formation with undeveloped natural fractures decreases quickly with the rapid closure of hydraulic fractures due to the rapid drop in fluid pressure, but the stress field remains relatively constant after the fracture is fully propped. For formation with developed low angle natural fractures, the stimulated stage promotes subsequent fracture propagation and improves fracturing efficiency. The fluid pressure declined slowly and is non-uniformly distributed during the closure of the complex fracture network. Therefore, the magnitude and scope of the induced stress vary unevenly with the closure time, and there is a reasonable treatment time to form complex fractures during hydraulic fracturing. This study provides new insights into fracturing operation.Hu MengHongkui GeJie BaiXiaoqiong WangJialiang ZhangYinghao ShenZuodong ZhangElsevierarticleHydraulic fracturingPropped fractureFluid pressureFracture closureStress fieldComplex fracture networkElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENEnergy Reports, Vol 7, Iss , Pp 7785-7803 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
Hydraulic fracturing Propped fracture Fluid pressure Fracture closure Stress field Complex fracture network Electrical engineering. Electronics. Nuclear engineering TK1-9971 |
| spellingShingle |
Hydraulic fracturing Propped fracture Fluid pressure Fracture closure Stress field Complex fracture network Electrical engineering. Electronics. Nuclear engineering TK1-9971 Hu Meng Hongkui Ge Jie Bai Xiaoqiong Wang Jialiang Zhang Yinghao Shen Zuodong Zhang Variation of induced stress field during hydraulic fracture closure and its influence on subsequent fracture |
| description |
After the completion of multi-stage fracturing operation, the fluid pressure in artificial fracture network continues to decrease, resulting in the closure of fracture and the variation of local induced stress field. This process can also lead to the variation of fracture propagation pattern in the subsequent fracturing stages. To better guide fracturing design, the time effect of stress field was researched. A numerical method was used to solve the induced stress around a propped fracture, and analyze the influence of formation properties and treatment parameters on its change. Then, the characteristics of stress field with different closure times and its influence on subsequent fracture were investigated. Finally, the evolution of the stress field in two stimulated wells was analyzed using the instantaneous shut-in pressure. The results show that the original horizontal stress difference, fluid pressure in fracture, fracture length, fracture angle, and amount of proppant have significant effects on the variation of induced stress field. The stress field of formation with undeveloped natural fractures decreases quickly with the rapid closure of hydraulic fractures due to the rapid drop in fluid pressure, but the stress field remains relatively constant after the fracture is fully propped. For formation with developed low angle natural fractures, the stimulated stage promotes subsequent fracture propagation and improves fracturing efficiency. The fluid pressure declined slowly and is non-uniformly distributed during the closure of the complex fracture network. Therefore, the magnitude and scope of the induced stress vary unevenly with the closure time, and there is a reasonable treatment time to form complex fractures during hydraulic fracturing. This study provides new insights into fracturing operation. |
| format |
article |
| author |
Hu Meng Hongkui Ge Jie Bai Xiaoqiong Wang Jialiang Zhang Yinghao Shen Zuodong Zhang |
| author_facet |
Hu Meng Hongkui Ge Jie Bai Xiaoqiong Wang Jialiang Zhang Yinghao Shen Zuodong Zhang |
| author_sort |
Hu Meng |
| title |
Variation of induced stress field during hydraulic fracture closure and its influence on subsequent fracture |
| title_short |
Variation of induced stress field during hydraulic fracture closure and its influence on subsequent fracture |
| title_full |
Variation of induced stress field during hydraulic fracture closure and its influence on subsequent fracture |
| title_fullStr |
Variation of induced stress field during hydraulic fracture closure and its influence on subsequent fracture |
| title_full_unstemmed |
Variation of induced stress field during hydraulic fracture closure and its influence on subsequent fracture |
| title_sort |
variation of induced stress field during hydraulic fracture closure and its influence on subsequent fracture |
| publisher |
Elsevier |
| publishDate |
2021 |
| url |
https://doaj.org/article/f2481f323f8f4d7c9cfab0327f53d167 |
| work_keys_str_mv |
AT humeng variationofinducedstressfieldduringhydraulicfractureclosureanditsinfluenceonsubsequentfracture AT hongkuige variationofinducedstressfieldduringhydraulicfractureclosureanditsinfluenceonsubsequentfracture AT jiebai variationofinducedstressfieldduringhydraulicfractureclosureanditsinfluenceonsubsequentfracture AT xiaoqiongwang variationofinducedstressfieldduringhydraulicfractureclosureanditsinfluenceonsubsequentfracture AT jialiangzhang variationofinducedstressfieldduringhydraulicfractureclosureanditsinfluenceonsubsequentfracture AT yinghaoshen variationofinducedstressfieldduringhydraulicfractureclosureanditsinfluenceonsubsequentfracture AT zuodongzhang variationofinducedstressfieldduringhydraulicfractureclosureanditsinfluenceonsubsequentfracture |
| _version_ |
1718409876917452800 |