Research On Coalbed Methane Recovery Influence Factories And Countermeasures Of Jiaoping Mining Area

Coal high pressure isothermal adsorption evaluation method，hydrocarbon reservoirwetting evaluation method, reservoir sensitivity flow evaluation method, water-basedfracturing lfuid performance evaluation method, dirlling fluid completion and fluid damage toreservoir indoor evaluation method in this paper are used to research on reservoir sensitivity,gas isothermal adsorption and desorption mechanism, water isothermal adsorption anddesorption mechanism, wettability, stress sensitivity as well as fractuirng fluid and dirllingfluid damage to the shallow，low temperature and low pressure coal seam in JiaoPing miningarea, the analysis results show that stress sensitivity is strong, water phase velocity sensitivecaused by coal particles migration is outstanding, coal seam hydrophilic caused by coal scamsurface organic matter with hydrophilic groups，fractuirng lfuid and dirlling fluid return abilitydroped because of coal cleat permeability declines caused by fracturing lfuid and dirlling lfuidinvade into coal seam resulted in JiaoPing mining area CBM desorption dififculties, furtheraffect coalbed methane recovery.On the basis of the experimental research and theory analysis, some correspondingcountermeasures and Suggestions are put forward in this thesis.