MOE Key Lab of 0il & Gas Resources and Exploration Technology,Yangtze University Research Insttute of Exploration and Development,North China Oilfield Company,CNPC

为了找出适应郑庄区块直井水力压裂的高煤阶储层特点,从区域地质背景出发,通过对生产资料、测井、录井及测试报告等资料分析,研究了郑庄区块煤层气直井产能差异的影响因素。研究结果表明:区域性的煤层气直井产能差异,主要是由于水力压裂技术与区域性煤储层地质特点不匹配引起的,直井水力压裂效果主要受煤体结构、解吸压力、地应力及储层流体可疏导性等因素的控制,这些因素共同影响高煤阶煤层气开发效果;其中Ⅰ和Ⅱ类产能单元内储层特点适应水力压裂改造方式,最低要求原生结构煤比例大于0.3,解吸压力大于2.0 MPa,地应力指数大于0.9,流体可疏导指数大于20;Ⅲ和Ⅳ类产能储层单元特点,不适合直井水力压裂的增产改造方式,应考虑其他增产措施。

in orderto seek the igh rankcoalreservoir features suitable for the well ydrauli fracturing inZhengzhuang Blck,from the regional geological background,.with the analysis on the production information,well loging and test reprt as well as other infomaton.the factors affeced to the capacity diferences of the veric:l wells in Zhengzhuang Block were studied.The resuts showed that the differencesof the regional rical wls were mainly caused due tothe hyrauli frcturing tectnology not matched to the geological features of the regional coalresevorthe hydrauli frcturing efe ct of the vertctal .e wul be mainl cotrol ldby thec al stcture,adsorption pressure geostress ,fuid dredgeablity of the reservoir and oter factors and thosefactors would be jonti ffected to the development ef c of the hig rank coalbed methane. Among them,the Type I and Ⅱ capacity unit's reservoir features would be suitable for the reconstruction method of the present hydraulie fracturng.the percentage of the initu structure cal should be hicher than 0 3 at less the adsoption pressure should be higher t han 2.0 MPa.the geosress index should be higher than 0.9 and the fuid dredgeabity index should be igher than 20. Under the present features 7ype Ⅲ and NV copaity unis resevoirs features would not be suitable for the reconstruction method with the hydrauli fracturing of the verical wel or the productio increasing and should consioeroter measues to increase the production.

中国石油天然气股份有限公司华北油田分公司科技专项资助项目(2013E-2208-2015-M05)；