The Calculation Of Fracture Pressure And The Study Of Fracturing Technology In Dingshan Structure Area

Fracturing technology has been playing a decisive role in the process of shale gas exploration and development.However,there are some problems in deep shale fracture,such as the rock properties is complex,the breakdown pressure is difficult to predict,the closure stress is high,gravel inputting is hard,and the mechanism of crack propagation is not clear.Based on the problems encountered in the process,this paper take Southeast Sichuan Dingshan structure area high force shale reservoir as the research object,through rock mechanical test on the shale in the region under the conditions of high temperature and high pressure to get rock mechanics parameters,and combine with the formation of transversely isotropic on the effect of pressure on the characteristics of the fracture,to establish the prediction model for the block of shale reservoir characteristics of fracture pressure.The fracture pressure data obtained by field fracturing are verified,and the anastomosis degree is high.At the same time,the analysis of Dingshan structure area of reservoir characteristics,combined the fracture pressure prediction model,summarizes the tectonic regions exist in the fracturing process of technical difficulties,to optimize fracturing material and hydraulic fracturing parameters,formed a set of adaptation to Dingshan structure high power storage feature layer fracturing technology system.This has certain reference significance for deep shale gas fracturing.