A comprehensive review of numerical simulation methods for hydraulic fracturing

Ismail, Atif; Azadbakht, Saman

doi:10.1002/nag.3689

Cited by 5 publications

(1 citation statement)

References 173 publications

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“…By conducting independent fracturing operations within each cluster, better coverage of the underground rock formations is achieved, maximizing the release of hydrocarbon resources from the reservoir [4]. Through staged fracturing, engineers can optimize fracturing designs based on geological conditions, rock properties, and fluid dynamics, thus maximizing the release of hydrocarbon resources from underground reservoirs [5]. The advantages of multi-cluster fracturing technology in horizontal wells include the following [6,7]: (1) By deploying multiple fracturing clusters across various segments of the horizontal well, a more uniform coverage of the underground reservoir is achieved, enhancing oil and gas recovery rates and extraction efficiency, while avoiding uneven production within the fracturing zone.…”

Section: Introductionmentioning

confidence: 99%

Study on the Interaction Propagation Mechanism of Inter-Cluster Fractures under Different Fracturing Sequences

Cai,

Zhao,

et al. 2024

Processes

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Horizontal-well multi-cluster fracturing is one of the most important techniques for increasing the recovery rate in unconventional oil and gas reservoir development. However, under the influence of complex induced stress fields, the mechanism of interaction and propagation of fractures within each segment remains unclear. In this study, based on rock fracture criteria, combined with the boundary element displacement discontinuity method, a two-dimensional numerical simulation model of hydraulic fracturing crack propagation in a planar plane was established. Using this model, the interaction and propagation process of inter-cluster fractures under different fracturing sequences within horizontal well segments and the mechanism of induced stress field effects were analyzed. The influence mechanism of cluster spacing, fracture design length, and fracture internal pressure on the propagation morphology of inter-cluster fractures was also investigated. The research results indicate that, when using the alternating fracturing method, it is advisable to appropriately increase the cluster spacing to weaken the inhibitory effect of induced stress around the fractures created by prior fracturing on subsequent fracturing. Compared to the alternating fracturing method, the propagation morphology of fractures under the symmetrical fracturing method is more complex. At smaller cluster spacing, fractures created by prior fracturing are more susceptible to being captured by fractures from subsequent fracturing. The findings of this study provide reliable theoretical support for the optimization design of fracturing sequences and fracturing processes in horizontal well segments.

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