Application of high energy electric pulse technology in coalbed methane wells in Qinshui basin

In order to study the application effect of high energy electric pulse technology in coalbed methane wells, four CBM wells in Qinshui basin were tested by electric pulse technology. The results show that the gas production and water production of four coalbed methane wells in the early stage of the test increased more obviously than that before the test, which shows that the application of electric pulse technology in coal reservoir can really remove plugging, improve liquid flow and promote gas desorption. The gas production and water production of the four wells were basically attenuated after 10-20 days of the test, which indicates that the effective radius of the electric pulse technology is shorter in the coal reservoir in this area. The gas production and water production of two wells after operation for 100 days were still higher than that before test. It shows that the electric pulse technology has the adaptability choice and the good application prospect in the near wellbore plugging removal and production promotion of coalbed methane wells. There are limitations in the application of electric pulse stimulation technology in coal seams with low coal mass strength and fractured coal structure. It is better to apply electric pulse stimulation technology in coal seams with complete structure, and optimize the technical parameters for different well conditions, so as to improve the application effect of electric pulse stimulation technology. This technology can only be used as the secondary reformation measure of coal reservoir, can not replace the conventional fracturing technology as the primary reformation measure of coal seam.