Study On Fracture Propagation Rule And Technical Methods Of Coal Seam With High-Dip Angle

High dip angle of CBM resources prevalent in areas of the country, such as Xinjiang Fukang Baiyanghe is a coal mining area which has high dip angle, so that it make the stimulation particular. Aiming at meeting the production demand and developing resources effectively, It is necessary to carry out research on the rules of fracture propagation and technical measure to solve the problem above.In this paper, Xinjiang Fukang Baiyanghe block is target block, conduct research on high dip angle inclined seam fracturing law technology and technology countermeasures, 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) Collect, collate geology, fracturing and drainage data,summarized out the target block geological characteristics, Using the test method, the log interpretation method, the pressure drop analysis of post-fracturing and the well test interpretation evaluation the coal properties. And proposed comprehensive evaluation method, laid the foundation for subsequent research and field applications.(2) In combination with actual situation of the target block, using the double standards of diagnosising fracture morphology, this paper has a research about fracture propagation on the data of 78 fracturing construction layer, and initially revealed the rule. At the same time, this paper collectes microseismic monitoring data to rule and summarize the extending bearing of crack(3) This paper article were applied three methods microseismic fracture monitoring,fracture numerical simulation and pressure after pressure drop analysis, and identified the geometry size of the target block. By introducing uncertainty theory conduct a comprehensive assessment. further proof the matching of the cracks extend geometry size and the coal seam physical properties.(4) Based on the fracture propagation rules, this paper summarizes out favorable factorsand unfavorable factors of the coalbed methane production, and puts forward the corresponding technical measures.