煤层气储层非常规测井资料评价方法研究

摘要

Energy spectrum, electrical imaging and dipole array acoustic logging information in A area, Qinshui basin, are used to comprehensively evaluate regional CBM(coalbed methane). From analyses of maceral, metamorphic grade, caprock conde and structure development, an e-valuation method using unconventional logging data to dividing the gas content system of coalbed were established. When the metamorphic grade, maceral and ash content of coalbed was the same or the similar, the gas content system of coalbed could be divided into 2 levels by combining dipole array acoustic logging data with electrical imaging data By contrasting with the actual information, the evaluation method was confirmed to be correct and reliable in dividing the gas content system of coalbed, which offered accurate logging data for the overall evaluation of region CBM (coalbed methane), and provided reliable technical support for the next CBM exploration and development.%利用沁水盆地中部A井区的能谱、电成像和偶极子阵列声波测井资料开展区域煤层气测井综合评价研究,从显微组分、变质程度、盖层条件、构造发育情况等方面进行了综合分析,建立了利用非常规测井资料划分煤层含气量系统的方法.当煤层的变质程度、显微组分和灰分相同或相近时,利用偶极子阵列声波测井资料,结合电成像测井资料可以把煤层含气量系统划分成2个级别对煤岩储层含气量进行有效的综合评价.利用能谱测井中的无铀自然伽马求取灰分含量,以消除铀对计算结果的影响；通过与实际资料对比,证实此项评价方法划分煤层含气量系统的正确性及可靠性,为后续开发和压裂施工提供依据,为区域煤层气整体评价提供准确的测井信息.