基于ANSYS软件的降低破裂压力机理模拟

doi:10.11743/ogg20120420

Abstract

Abstract:

According to characteristics of various fracturing pressure reducing techniques for fracturing operation in deep wells,this paper established stress calculation models for open hole completion and casing-perforated completion using the ANSYS software,and calculated the rock stress near the wellbore during fracturing.We also analyzed the effects of various factors on fracturing pressure,such as reservoir burial depth,reservoir rock physical property,deep penetration perforation and acidification pretreatment.The results show that the Yang’s modulus of reservoir rock has great influence on the fracturing pressure.Fracturing pressure of rocks increases with the increasing Yang’s modulus.In contrast,Poisson’s ratio has less influence on the fracturing pressure.Acidification pretreatment may reduce the Yang’s modulus.The effect of perforating depth on reducing fracturing pressure decreases as the perforating depth increases.In field operation,the perforating depth needs to be optimized based on the well condition.

Key words: ANSYS, stress, hydraulic fracture, fracturing pressure, fracturing production

CLC Number:

TE357

Su Jianzheng, Huang Zhiwen, Long Qiulian, Liu Changyin. ANSYS-based simulation of fracturing pressure reducing mechanism[J]. Oil & Gas Geology, 2012, 33(4): 640-645.

References

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ANSYS-based simulation of fracturing pressure reducing mechanism

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