The Main Control Factors Research On Productivity Of CBM Vertical Well In Luling Mine Field

Luling mine field belongs to high gas and double outburst mine, it has certain representativeness in Huainan and Huaibei areas, Its special structure of coal lead to CBM development is difficult. Its purpose to research its main factors is to explore suitable method for CBM well production and development of technology to some extent in this area, It will be conducive to further development of the CBM in this block. This paper based on the collection of reservoir characteristics、reservoir reconstruction and drainage gas recovery daily data, adopt the method of theoretical analysis and production practice to qualitative analysis its main capacity factor, and then evaluate and analyze it, and put forward some specific proposals for the development of CBM in Luling mine field, and then research it quantitatively. through count geological parameters 、 reservoir fracturing construction parameters and drainage gas work system parameters, Based on the theory of grey system theory and using Deng’s related degree of it, and then re-list, range, correlation coefficient, correlation degree and weight calculation and sequence the factors. and finally Determined from the geological factors to consider, the original reservoir permeability and the thickness of coal seam are the main influencing factors; and considering from the reservoir reconstruction, the perforation of coal seam thickness, sand adding scale, the amount of fracturing fluid, the average ratio of sand are the main influencing factors; and considering from the drainage gas work system, average casing pressure, the actual critical desorption pressure, the average daily amount of fluid level drops are the main influencing factors.