重磁电震联合反演在合肥盆地勘探中的应用

在合肥盆地开展了高精度重力、航磁、电法、地震(简称重磁电震)、化探等多种方法勘探的基础上,本文通过对重磁电资料的目标处理,建立起全区地球物理场;应用重磁电震资料联合反演,获得的主要成果有：①完成了印支面及结晶基底构造图;②发现了“影子盆地”;⑧本区自南而北划分为四个构造带,即前陆冲断带、前渊沉降带、前隆断褶带、隆后斜坡带;④指明前陆冲断带和前隆断褶带是合肥盆地油气勘探突破的有利地区。

Application of joint-inversion of gravity, magnetic,electric and seismic data to exploration in Hefei basin.

On the basis of multiple exploration methods such as high precise gravity survey, aeromagnetic survey,electrical survey and seismic prospecting ( simplified as gravity, magnetic, electric and seismic)developed in Hefei basin,the paper built up the feature of geophysical field in the whole area through object-oriented processing of gravity. mag-netic and electric data; applying joint-inversion of above-mentioned geophysical data resulted in fol-lowing results: (1) finished the structural maps of Indosinian interface and crystal basement; (2) dis-covered "shadow basin ";(3)divided the region into four structural belts from south to north; foreland thrust belt, foredeep depressed belt, fore-bulge fault-folding belt and back-bulge slope belt; (4) pointed out the foreland thrust belt and fore-bulge fault-folding belt are prospective areas that can make oil-gas exploration breakthrough in Hefei basin.