长平井田三维勘探精细构造解释  

FINE STRUCTURE INTERPRETATION OF 3-D SEISMIC EXPLORATION IN CHANGPING MINE FIELD

作　　者：张茗 刘怀山[1,2] 邢磊 李京涛[3] 

机构地区：[1]中国海洋大学海洋地球科学学院,青岛266100 [2]海洋国家实验室海洋矿产资源评价与探测技术功能实验室,青岛266061 [3]山东省煤田地质局物探测量队,济南251000

出　　处：《海洋地质前沿》2018年第2期61-68,共8页Marine Geology Frontiers

基　　金：国家自然科学基金(41176077;41230318);国家高技术研究发展计划(863计划)(2013AA092501)

摘　　要：山西沁水盆地是一个构造残留型的富煤盆地,是我国最大的煤层气田。长平井田位于沁水盆地南部,是煤层气成藏的有利区域,且该区域煤层气的形成及分布以构造成因为主要因素。在三维地震勘探偏移数据体的基础上,对研究区域的速度进行标定,对层位、断层、陷落柱以及褶曲进行精细解释,获得该区域精细构造特征描述。与原二维构造特征对比发现:三维地震构造特征中的煤系地层走向和埋深与原二维构造特征基本一致;三维地震构造特征反映出沿走向上发育的多个短轴状展布小幅褶曲,新增断层19条和新增陷落柱24个;查明原二维构造特征与三维构造特征中不一致的一条断层和陷落柱的位置,获得对地下煤层精确的成像解释。通过该区测井资料验证,三维地震构造特征符合地下实际情况,验证了三维精细构造解释的准确性。The Qinshui Basin of Shanxi province,a residual coal-rich basin,is the largest coal-bed gas fields in China.The Changping Mine,located in the southern part of the Basin,is a favorable area for coal-bed gas accumulation due to structural causes.A structural map of the area is compiled by calibration of wave speed and fine interpretation of horizons,faults,collapse columns and folds on the basis of a 3-D offset data volume.Comparison suggests that the strike and the buried depth of coal measure strata of the 3-D structural description are basically consistent with the 2-D description.In addition,some small folds along the strike are observed in 3-D structural description,and 19 new faults and 24 new collapse columns are discovered.A fault in the northeastern part of the 2-D structural description and a collapse column at the northeast border are found inconsistent with the 3-D structural description.Through the performance mentioned above,a more accurate interpretation of the coal seams is proposed.The accuracy of the 3-D fine structure interpretation is further verified by logging data.and the 3-D structural description fits better the actual situation.

关 键 词：长平井田 精细构造解释 断层 陷落柱 褶曲 

分 类 号：P631.4[天文地球—地质矿产勘探]