【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。更多还原

【Abstract】 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.更多还原