Study On The Extension Law And Fracturing Measures Of High-angle Coal Seam Cracks

High dip angle coal seam widespread in our various coal basins,it has large reserves and wide distribution.For example Fukang Poplar Creek Mine is a typical high dip angle coal seam.The fracturing of this coal seam that have in common of CBM,but also has its own characteristics,is a new topic to be solved.In this paper,Xinjiang Fukang Poplar Creek Mine block is target block,not only focus on high dip angle seam homosexual,but also watch out the target block personality.By studying at the postgraduate stage,achieved the main research is as follows:(1)Aim at the target block fracturing process composite fracturing fluid system,we improve and perfect the seam fracturing pressure analysis techniques and applied it to the target block diagnostic fracture morphology,initially revealed the fracture morphology of laws of the various target coal seam blocks,for fracturing program provides the foundation and basis to develop.(2)According to the characteristics of high dip angle coal seam fracturing is easy to form a complex fracture.In this paper we research in diagnosis and treatment technology of bending fracture and branch fracture,and revealing the bending degree and the branch of each seam in the target block,and put forward targeted control measures.(3)Improve and refine the assessment of reservoir permeability after pressure drop analysis technology,and achieve automatic classification process of interpretation and numerical calculations.(4)Application of pressure drop analysis technology,assessment of the target block size of fracturing parameters,provides guidance for the subsequent construction of the block.(5)Integration of these technologies,we disigned the High Dip Angle Coal Seam fracturing analysis software,and achieved a comprehensive analysis of unified data management and High dip angle coal seam fracturing data.At the same time,for the status fracturing of target block,proposed a "practice-assessment-refining-and then practice"fracture stimulation mode,and application examples.