Research And Application Of Fracturing Technology For Low Permeability And Difficulty Reservoir

Our oil and gas resources one of the distinguishing characteristics are in low permeability reservoirs widely distributed,large amount of resources, and often small-scale, low abundance, Reservoir forming conditions are poor, thin oil, oil-water complex relationships, strong heterogeneity、reservoir changes large, buried deep etc features. Such low permeability reservoir called difficult mining reservoir. Due to current the limitations of methods of mining, a large part of the geological reservoir has not been utilized. Therefore, the study of low permeability difficult mining reservoir fracturing technology is important and necessary.In this paper, Xinjiang Oilfield Bai 34 wells as a specific study area, through during the masters stage’s research and field tests. The research results obtained are as follows:(1) By conducting the critical parameters experiments confirm and statistical analysis of a large number of historical data. mastered the reservoir characteristics,confirmed the critical parameters of reservoir stimulation,laid the foundation of the reservoir stimulation.(2) Based on the analysis of reservoir characteristics, carried out grey relational analysis,the fracturing process real-time monitoring and interpretation, the pressure drop analysis, well test analysis etc analysis and evaluation work. Identifies key factors influencing the fracturing effects, formulate the future develop measures of countermeasure.(3) Forming a difficult mining low permeability reservoir fracturing fluid system:by carrying out a large number of fracturing fluid adaptation analysis, performance testing and formulation design work, formation of new dual anti-swelling fracturing fluid formulation.(4) Against the proppant screening and optimization combination, propose three changes proppant technology.(5) Against difficult mining reservoir and its characteristics, carried out deep penetration fracturing, steering fracturing, layered fracturing technology etc adaptability analysis, confirmed the corresponding fracturing process.