Study On Fracturing Technology Of Fracture Gas Reservoir In

The fifth member of xujiahe gas reservoir from xinchang structure in western Sichuan is super-low porosity and permeability reservoir, superimposed by multi-layer of shale and silt-finestone, Depth from2500to3500m and development of natural fractures. Hydraulic fracturing is the necessary mean to Xu5gas reservoir. Due to the development of natural fractures, the fracture rupturing pattern and extending model is fundamentally different from normal sandstone gas reservoirs. Therefore, it is necessary to study the fracture initiation and extending model in Xu5gas reservoir, It has great significance for guiding the engineering design of hydraulic fracture. This paper mainly completed the following work:(1)The geological characteristics of Xu5gas reservoir is analyzed, and Summarized the reservoir property, rock mechanical parameters and fracture occurrence and distribution, which is related Hydraulic fracturing.(2)Using the theory of elastic mechanics and geometric transformation, Established the stress distribution model of shaft wall rock and perforation wall in inclined well; Considering Perforation fellowship with natural fractures, established the fracturing pressure model based on classic rock mechanics and elastic, and has analysed the influencing factors of the fracturing pressure with the reservoir geological parameters of Xu5gas reservoir.(3)Using the classic intersection rule of hydraulic fracture and natural fracture to analysis the influence factors of hydraulic fracture and natural fracture intersection, and has analysed the intersection behavior in hydraulic fracture by using parameters of Xu5;(4)On the basis of early reconstruction experience and in Xu5gas reservoir and the achievement of this paper, designed and implemented the fracturing scheme of well XC32; Using the construction data and micro seismic monitoring results analyzing the renovation results of well XC32, and has obtained the relevant technical understanding of hydraulic fracturing in Xu5gas reservoir.Selecting Xu5gas reservoir as the research object, this paper Carried out a more in-depth study of fracture initiation and extension model, which has an important engineering significance for guiding fracturing in Gas reservoir, and It is also a reference for the similar reservoir fracturing.