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.