重磁电联合反演在银—额盆地勘探中的应用

英文篇名：COMBINED INVERSION OF GRAVITY GEOMAGNETIC AND ELECTRIC EXPLORATION IN THE YINGEN-EJINAQI BASIN
中文刊名：陕西地质
英文刊名：Geology of Shaanxi
作者：申安斌 ; 刘建利 ; 陈小龙
英文作者：Shen An-bin1 ; Liu Jian-li1 ; 2 ; Chen Xiao-long1 (1.Geophysical and Geochemical Exploration Team of Shaaxni Bureau of Geology and Mineral Resources ; Xi'an 710043 ; 2.China University of Geosciences ; Beijing 100083)
中文关键词：重磁电联合反演 ; 银—额盆地 ; 构造与地层 ; 定量解释
英文关键词：combined gravity and magnetoelectric inversion ; the Yingen-Ejinaqi basin ; tectonics and stratigrphy ; quantitative interpretation
出版日期：2012-06-15
机构：陕西省地矿局物化探队;中国地质大学;
年：2012
期：01
出版单位：陕西地质

摘要

依据大地电磁测深连续二维反演结果初步确定构造与地层,通过综合分析区内物性特征给定地层与岩石的物性参数,建立正演地质—地球物理初始模型,在地质、钻井、地震资料约束下进行重磁电联合反演,不断修改地质—地球物理模型和大地电磁测深连续二维反演结果,使重磁正演数据和实测数据拟合度达到最佳。在银—额盆地构造与地层解释中的应用结果表明,重磁电联合反演可以有效克服单方法解释的多解性,准确识别地质层位,大大提高定量解释的精度。
Preliminary determination of structures and stratigraphy are achieved by two-dimensional inversion of successive magnetotelluric sounding.Based on overall analysis of stratigraphical and petrophysical parameters defined by regionally physical properties,a preliminary forward model of geology and geophysics has been created.Combined gravity and magnetoelectric inversion commenced by geological,drilling and seismic data constantly revises the geological-geophysical model and the successive two-dimensional inversion result from magnetotelluric sounding,bringing the gravity-magnetic forward data and measured data to the most optimum fitting degree.Combined gravity and magnetoelectric inversion used for interpretation of tectonics and stratigrphy of the Yingen-Ejinaqi basin can effectively solve the problems derived from a single method and accurately indentify horizons of stratigraphy,thus greatly improving the accuracy of quantitative interpretation.

引文