Drilling and completion technology of coalbed methane cluster wells in Yanchuannan Block

in order to realize an econmic and high eficient development of the coabe methane in Yanchuannan Bock.according to thereservoir physical propertes and geomorphic features of the block fat area should be selected forthe layout of the wellsite and the custer well roup would be aplied to the coabed methanedevelopmernt.Based on the develogmert features of the custer wells in Yanchuannan Block.the paper in deal analyzed th " well actor " driling and completion tetcmology appild to the custer well developmen.Einphasized on the well number optinization of the platform.optimization of rllig sequence coision prolection reatment between the wells equipoment ofthea iling rig.repeated utiiation of the driling liquid and oflielogging and cementing aspects a deep analysis was conductedon the "wvel factory"cperation mode.The site stetisic resuts showed tat the appication of"well actory"'resouces joit shaing mode to implement the rling and completion operation of the custer wels could whally improve the drling speed and qualt of the coalbed methane wel s The dillig and completion period of a single wel was9.25 days in average a criling perod of a single well wa 7.54 days in average and the mechanical driling speed was 17.16 mh in averag.A low cost igh eficencyand large scale development of the coalbed methane was realized.