1. Coal Reservoir Laboratory,National Engineering Research Center of CBM Development & Utilization,China University of Geosciences( Beijing),Beijing　100083,China;2. PetroChina Huabei Oilfield Company,CNPC,Renqiu　 062552,China;3. China’s Geological Library,Beijing　 100083,China

准确预测煤体结构平面与纵向分布规律对煤层气勘探开发具有重要的指导作用。对安泽区块13口探井88个煤样的6种测井数据进行对应分析结果表明,由煤芯获得的不同煤体结构的样品点在对应分析获得的因子载荷图中聚类分布(对应分析划分结果与岩芯获得的煤体结构类型吻合度高达97.7%),可据此划分区内其他井的煤体结构类型并预测全区煤体结构分布。预测结果表明:纵向上,原生结构煤发育于煤层的顶底两端,碎粒结构煤发育于煤层中部,碎裂结构煤多发育于原生、碎粒结构煤之间;平面上,北部及南部An12井附近原生煤和碎裂结构煤发育(Ⅰ区),南部An28井与An22井附近和中南部断层F1与F2附近发育碎粒结构煤(Ⅱ区);安泽区块Ⅰ区较南部和中南部Ⅱ区储层条件相对有利。

To better understand the effect of coal structure on CBM exploitation,the plane distribution and vertical vari- ation of coal structure were accurately acquired. Using six kinds of logging data from 88 coal coring samples in 13 ex- ploration wells,the coal coring samples were systematically and quantitatively divided by using correspondence analysis technology,which showed that the core samples of different coal structures acquired from core logging data clustered together in the corresponding analysis map obtained from correspondence analysis (the matching rate of the classifica- tion coal coring samples divided by using correspondence analysis and coal structure acquired from core logging data was 97. 7% ). Based on the result from corresponding analysis,the coal structure of the remaining CBM wells can be evaluated. Therefore the coal structure distribution of the Anze area can be acquired. The coal structures were evalua- ted:vertically,undeformed coals in the top and bottom,cataclastic coals positioned between the undeformed and granu- lated coals,and granulated coals located in the middle;horizontally,furthermore,the undeformed coals and cataclastic coals are located in the northern and near An12 in the southern parts of the study area (area Ⅰ);the granulated coals are mainly near the well An28 and An22 in the southern and near the fault F1 and fault F2 in the south-central parts of the study area (area Ⅱ);Reservoir condition of area Ⅰ is more favorable than area Ⅰ in southern and south-cen- tral area.

国家自然科学基金资助项目(41472137)；全国优秀博士学位论文作者专项资金资助项目(201253)；山西省煤基重点科技攻关资助项目(MQ2014-01)；

Hou Yuehua,Yao Yanbin,Yang Yanhui,et al. Discriminate method of coal structure based on correspondence analysis technology:A case study in the Anze area,Qinshui Basin[J]. Journal of China Coal Society,2016,41(8):2041-2049.