准噶尔盆地乌伦古凹陷电性结构特征  

Electrical structure characteristics of Ulungu Sag in Junggar Basin

作　　者：陈清礼[1] 黄江衡 戴泽麟 贾宛瑜 薛毛毛 叶甘 CHEN Qingli;HUANG Jiangheng;DAI Zelin;JIA Wanyu;XUE Maomao;YE Gan(College of geophysics and petroleum resources,Yangtze University,Wuhan 430100,Hubei)

机构地区：[1]长江大学地球物理与石油资源学院,湖北武汉430100

出　　处：《长江大学学报（自然科学版）》2024年第1期49-56,共8页Journal of Yangtze University(Natural Science Edition)

基　　金：国家自然科学基金面上项目“基于时间域高斯束变换的多震源数据高精度分离与高效偏移方法研究”(42174159)。

摘　　要：弄清准噶尔盆地乌伦古凹陷地下深部电性结构,对于准噶尔盆地乌伦古凹陷的深部油气勘探具有重要意义。综合钻井、地震、测井、地质露头观测及分析化验等资料,总结了研究区的地球物理特征,包括地层岩石密度特征、磁性特征、电性特征。在此基础上,对乌伦古凹陷的一条大地电磁测深原始时间序列的电场数据进行视电阻率曲线平滑处理和静态偏移校正处理,并采用Occam法进行反演,得到乌伦古凹陷地下10km深度范围内的电阻率剖面。依据该电阻率剖面,结合地震及钻井资料,初步确定了准噶尔盆地乌伦古凹陷地层的构造形态,发现乌伦古凹陷西北端和东南端地下存在高阻异常,且基底中存在低阻地层。研究结论对准噶尔盆地乌伦古凹陷的油气勘探具有重要的价值。Understanding the deep underground electrical structure of Ulungu Sag in Junggar Basin is of great significance for deep oil and gas exploration of Ulungu Sag in Junggar Basin.Based on the data of drilling,logging,geological outcrop observation and analysis,the geophysical characteristics of the study area are summarized,including the density characteristics,magnetic characteristics and electrical characteristics of the formation rocks.On this basis,the apparent resistivity curve smoothing and static migration correction of the electric field data of an original time series of magnetotelluric sounding in Ulungu Sag are processed,and the resistivity profile within 10 km underground depth of Ulungu Sag is obtained by Occam.Based on the resistivity profile and seismic and drilling data,the structural morphology of Ulungu Sag in Junggar Basin is preliminarily determined.It is found that there are high resistivity anomalies in the northwest and southeast end of Ulungu Sag,and low resistivity strata in the basement.The research conclusion is of great value for oil and gas exploration of Ulungu Sag in Junggar Basin.

关 键 词：电性结构 大地电磁测深 准噶尔盆地 乌伦古凹陷 反演 

分 类 号：P631.325[天文地球—地质矿产勘探] TE132.14[天文地球—地质学]