Numerical investigation of interactions between hydraulic and pre-existing opening-mode fractures in crystalline rocks based on a hydro-grain-based model

Wang, Song; Zhou, Jian; Zhang, Luqing; Han, Zhenhua; Kong, Yanlong

doi:10.1016/j.geoen.2023.212073

Cited by 2 publications

(4 citation statements)

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“…, 2018; Wang and Liu, 2022, 2023; Wang et al. , 2023a, b, c). The researches have provided the direct evidence about the applicability of the method to the simulation of the multistage hydrofracturing of horizontal wells in shale reservoirs, and the effectiveness of the method and program for solving hydraulic fracturing problems is verified.…”

Section: Numerical Models and Cases Of Multi-well Hydrofracturingmentioning

confidence: 99%

“…Under different well spacing, the contact slip events caused by fracturing is obviously smaller than the damage events caused by hydraulic fracturing (Wang et al. , 2023a, b, c).…”

Section: Introductionmentioning

confidence: 97%

“…With the increase of well spacing, the effect of fracturing-induced stratal movement and squeezing deformation decrease (Wang et al. , 2023a, b, c). With the increase of well spacing, the pressure derivative of transition flow becomes smaller and the start time is gradually delayed.…”

Section: Introductionmentioning

confidence: 99%

“…At the same time, increasing the fluid injection rate can delay the deflection of the hydraulic fracture and extend the propagation distance along the fracture (Wang et al. , 2023a, b, c). Related to the injection rate, the longer the oil production time of the parent well, it will also lead to fracture.…”

Section: Introductionmentioning

confidence: 99%

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Frac-hits and connections of multi-well hydrofracturing fracture network involving the variable factors: well spacing, perforation cluster spacing and injection rate

Wang,

Li,

Liu

2024

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PurposeWith the development of fracturing technology, the research of multi-well hydrofracturing becomes the key issue. Frac-hits in multi-well hydrofracturing has an important effect on fracture propagation and final production of fractured well; in the process of hydrofracturing, there are many implement parameters that can affect frac-hits, and previous studies in this area have not systematically targeted the influence of a single parameter on multi-well hydrofracturing. Therefore, it is of great significance to study the occurrence rule and influence of frac-hits for optimizing the design of fracturing wells.Design/methodology/approachBased on the proposed numerical models, the effects of different fracturing implement parameters (perforation cluster spacing, well spacing and injection rate) on frac-hits are compared in numerical cases. Through the analysis of fracture network, stress field and microseismic, the effects of different fracturing implement parameters on frac-hits and connections are compared.FindingsThe simulation results show that the effect of perforation cluster spacing and well spacing on frac-hits is greater than that of injection rate. Smaller well spacing makes it easier for fractures between adjacent wells to interact with each other, which increases the risk of frac-hits and reduces the risk of fracture connections. Smaller perforation cluster spacing results in larger individual fracture lengths and greater deflection angles, which makes the possibility of frac-hits and connections greater. The lower the injection rate, the lower the probability of frac-hits.Originality/valueIn this study, the influence of different fracturing implement parameters on frac-hits and connections in multi-well hydrofracturing is studied, and the mechanism of frac-hits and connections is analyzed through fracture network, stress field and microseismic analysis. Different simulation results are compared to optimize fracturing well parameter design and provide reference for engineering application.

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Section: Numerical Models and Cases Of Multi-well Hydrofracturingmentioning

confidence: 99%

“…Under different well spacing, the contact slip events caused by fracturing is obviously smaller than the damage events caused by hydraulic fracturing (Wang et al. , 2023a, b, c).…”

Section: Introductionmentioning

confidence: 97%