Influence of Perforation Parameter on Crack Initiation and Extending of Hydraulic Fracturing

Abstract:

Widespread problem in hydraulic fracturing of low-permeability reservoir is difficulty of crack initiation of fracturing, high initiation pressure of fracturing put forward higher requirements of fracturing equipment. Low-permeability reservoir for the study, in the fluid-solid coupling conditions, established a low-permeability reservoir perforation mechanical model of stress, using numerical solution techniques, consider the dynamic effects, we can achieve the stress distribution at different stages: drilling, well cementation, perforation and fracturing in low-permeability reservoir. With rock tensile fracture criterion can determine the initiation location and initiation pressure. The results show that the lower the degree of pollution in perforating hole, the smaller the pressure from the crack initiation as well as the higher the degree of pollution in perforating hole, the larger the pressure from the crack initiation. Orientation, diameter and depth of perforating hole effect on crack initiation and extension are more significant.

• Periodical: Advanced Materials Research (Volumes 594-597)
• Pages: 202-206
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.594-597.202
• Online since: November 2012
• Authors: Min Zheng Jiang, Yang Li, Yi Ming Zhang, Tian Xue Jiang, Ming Xing Liu
• Keywords: Crack Extension, Hydraulic Fracturing, Influencing Factor, Initiation Pressure, Low-Permeability Reservoir, Numerical Simulation

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