Coal seams in the Hancheng area have experienced multi -staged tectonic churning , caused coal mass structurally complex , and serious CBM well coal pulverized .At present , the study on distribution pattern of coal mass structure is insufficient in the area , thus restricted CBM production capacity improvement .Based on contractive analysis of well logging data and rock core sample data from Hancheng area , summed up compressional wave moveout well logging features of different coal mass structures in Hancheng north area , combined with assemblage features of deep and shallow laterolog resistivity logging , dual-diameter logging and density logging traces , have carried out identification of coal mass structure in the area and layering thickness confirmation .Through well logging data analysis of 25 CBM wells in the area , revealed coal mass structure spatial distribution patterns of coal Nos .3 and 11 are basically similar .In the area' s mid-east part has small area of category I structures distributed , most of the rest are categories II and III; in southeast and northwest parts of the area are mainly categories III and IV .%韩城地区煤层受多期构造破坏,煤体结构复杂,煤层气井出粉较为严重,目前对区内煤体结构分布规律研究尚且不足,制约了区内煤层气产能提高.依据对韩城地区测井资料与岩心样品资料的对比分析,总结出北区不同煤体结构的纵波时差测井特征,结合深浅侧向电阻率测井、双井径测井及密度测井曲线组合特征,对该区煤体结构进行识别及分层定厚.通过对研究区25口煤层气井测井资料的分析,揭示了3号和11号煤层煤体结构空间分布规律:3号与11号煤层的煤体结构在空间上的展布规律基本相似,区内中东部有小面积的Ⅰ类结构分布,其余大部分面积为Ⅱ、Ⅲ类结构分布区;区内的东南部及西北部以Ⅲ、Ⅳ类结构为主.
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