塔里木盆地乌泊尔-克拉托地区深层电性结构与地质解释  

Study on the deep electric structure and geological interpretation of Wuboer-Cratto structure in Tarim Basin,China

作　　者：陈延贵[1] 邢逸群 朱礼春[1] 乃国茹 张亮[1] 郭家松 陈才[1] 任凭[1] CHEN Yangui;XING Yiqun;ZHU Lichun;NAI Guoru;ZHANG Liang;GUO Jiasong;CHEN Cai;REN Ping(Research Institute of Exploration and Development,PetroChina Tarim Oil Field Company,Korla 841000,China;College of Geophysics,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]中国石油塔里木油田勘探开发研究院,新疆库尔勒841000 [2]成都理工大学地球物理学院,成都610059

出　　处：《成都理工大学学报（自然科学版）》2018年第6期760-769,共10页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：中国石油塔里木油田公司科研项目

摘　　要：利用基于电阻率等值性原理的薄层约束反演,并通过测井资料约束提升反演解释分辨率的方法,探讨塔里木盆地西南乌泊尔-克拉托地区油气分布区域。乌泊尔-克拉托地区的主要勘探目的层是下白垩统克孜勒苏群。由于构造活动强烈,区域地质结构、地表形态复杂,地震资料品质差,严重制约了目标层的油气勘探。通过对大地电磁剖面高分辨率处理并解释,查明了研究区地质结构和克孜勒苏群分布特征,发现了一套新生界到中生界的高低阻互层。克孜勒苏群在乌帕尔背驼盆地部分地区缺失,局部可能存在薄层分布;通过对电阻率求纵向导数方法,结合电阻率反演结果,识别出该地区的主要断裂及褶皱;根据电性特征确定了基底隆拗关系,发现乌帕尔背驼盆地最南端深部存在背斜构造。乌泊尔-克拉托地区油气勘探方向应主要在西昆仑山前的乌帕尔背驼盆地和乌帕尔断裂的下盘区域。The distribution of oil and gas in Wuboer-Cratto region of southwestern Tarim Basin is discussed based on the thin-layer constrained inversion of resistivity equivalence principle,combined with the logging data constraints for the improvement of inversion interpretation.The main exploration target in the Wuboer-Cratto region is the lower Cretaceous Kizilsu Group and its oil and gas exploration process has been hindered due to the strong tectonic activity,complex geological structure and poor quality of seismic data.The magnetotelluric profile in the Wuboer-Cratto area is reprocessed by high resolution interpretation and the geological structure characteristics of the Wuboer-Cratto region and the distribution characteristics of the lower Cretaceous Kizilsu Group are obtained.A set of high and low resistance interbeds from the Cenozoic to the Mesozoic occur in the area.It shows that the Kizilsu Group is absent in part of the Wupoer piggyback basin and minor thin layers may exist in some area.Longitudinal derivative method and resistivity inversion are used to effectively identify the main faults and folds and the relationship between uplift and depression in the basement is determined by electrical characteristics.The study reveals that anticline structure may exit in the southernmost tip of the Wupoer piggyback basin.It is considered that the oil and gas exploration direction in the Wuboer-Cratto area should be in the Wupoer piggyback basin in front of the West Kunlun Mountains and in the footwall area of the Wupoer fault.

关 键 词：约束反演 薄层识别 视电阻率 大地电磁 塔里木盆地 

分 类 号：P631.3[天文地球—地质矿产勘探]