南祁连盆地重力异常特征及其地质意义  

Gravity anomaly features analysis and its geological significance in Southern Qilian Basin

作　　者：屈念念[1,2,3] 张明华 黄金明[4] 余海龙[4] QU Nian-nian;ZHANG Ming-hua;HUANG Jin-ming;YU Hal-long(China University of Geosciences（ Beijing ） , Beijing 100083, China;Guizhou geological survey, Guiyang 550081, China;Guizhou Engineering Research Center for Geologic-Geophysical exploration development and application, Guiyang 550081, China;Development Research Center, China Geological Survey, Belting 100037, China)

机构地区：[1]中国地质大学(北京),北京100083 [2]贵州省地质调查院,贵阳550081 [3]贵州省地质物探开发应用工程技术研究中心,贵阳550081 [4]中国地质调查局发展研究中心,北京100037

出　　处：《地球物理学进展》2018年第3期1123-1131,共9页Progress in Geophysics

基　　金：中国地质调查局南祁连盆地重磁数据处理与解释项目;贵州省地质矿产勘查开发局地质科学研究项目(黔地矿科合2016(32);黔地矿科合2016(33));贵州省科学技术厅2018年度科技平台建设及人才团队计划项目(黔科合平台人才[2018]5626)联合资助

摘　　要：南祁连盆地具有丰富的油气资源,盆地内部坳陷边界、基底深度及内部构造控制着油气资源的分布.为落实南祁连盆地内部坳陷及构造分布,笔者充分利用多年来在研究区及周缘完成的各类勘探资料,以南祁连盆地的重力数据为主,结合相关资料,开展重力数据处理和综合反演解释,分析提取反映深大断裂的重力异常信息,并基于重力异常完成主要坳陷的密度界面深度反演和剖面2.5维反演,推断南祁连主要沉积盆地和坳陷的基底深度及起伏变化,进而综合讨论研究区主要坳陷的油气远景,为南祁连盆地油气资源战略调查和进一步勘探选区提供了依据.Southern Qilian Basin has rich oil and gas resources,and its internal depression boundary,basement depth and structure control the distribution of oil and gas resources. In order to ascertain the internal depression, structure distribution and other useful geological information in Southern Qilian Basin,The author fully uses and analyzes various exploration data in the research area and its peripheral area that have been completed for years,based mainly on the gravity data in Southern Qilian Basin,combing with related geological,seismic and Magnetotelluric（ MT） data,develops gravity data processing and comprehensive inversion to analyze and extract gravity and magnetic anomaly information reflecting huge fault,and completes the density interface depth inversion and 2. 5 dimensional profile inversion of the main depressions based on gravity anomaly to deduce the depth and the up-and-down varying shape of the main basement in Southern Qilian Basin,and then synthetically discusses the oil and gas prospecting of the main depression in research area,providing the basis for oil and gas resources strategic investigation and further exploration area evaluation.

关 键 词：南祁连盆地 重力异常 基底深度 油气勘探 

分 类 号：P631[天文地球—地质矿产勘探]