Research and application of deflection fracturing technology in coalbed methane well

Coalbed methane in Guizhou has high reservoir stress, low permeability and low porosity, and the conventional fracturing technology has a low degree of coal seam transformation, and has limited transformation volume and buck area. In order to explore the more efficient coal seam reconstruction technology, combined with conventional oil and gas field temporary plugging theory, temporary plugging is introduced into the fracturing technology. This technique is based on the theory of temporary plugging in conventional oil and gas fields, and analyzes the mechanism of turning from cracks in coal seam, turning radius, influencing factors and adaptability. The ZDJ-02 temporary plugging agent was screened and the size, dosage, dosing process and construction displacement of the temporary plugging agent were optimized to ensure that the coal seam was modified to a greater extent. At the same time, three wells were selected in Liupanshui and Bijie Prefecture, Guizhou Province to carry out the field test, and the results were very good. The exploration and development of coalbed methane and coalbed methane industry in Guizhou and fracturing research are of great significance.