综合物探技术新进展及应用

New progress and application of integrative geophysical survey techniques.

近年来,重磁电综合物探技术正向高精度、高分辨率三维及综合方向发展,前者是基础,后者是目的,因此这两个方面既有联系,又有区别。对于重磁力三维勘探而言,数据采集、地形改正和三维正反演法已逐步走向实用;对于电磁三维勘探而言,数据采集及处理在技术上可以方便地实现,现在已有一套较为可行的方法。当前的主要问题是三维正反演尚无一种比较适用和快速的算法,此外提议电磁数据三维可视化采用地震数据可视化的平台。文中在阐述重磁电综合物探技术发展时,强调不能沿用过去那种相互对比、参照的综合方式,必须建立在三维数据基础上的联合反演。现今已研究出约束外推法、异常剥离法、顺序修正法和统一修正法等联合反演方法。

In recent years, integrative geophysical techniques of gravity,magnetic survey and electric survey developed toward the direction of 3D high precision and high-resolution survey and integrative survey,the former is basis and the latter is objective,both aspects have both connection and difference. So far as 3D gravity and magnetic survey is concerned,the data acquisition,topographic correction and 3D forward and inversion methods are gradually practical; in view of 3D electro-magnetic survey,the data acquisition and processing can be easily fulfilled technically and there is a set of more feasible methods now, the current main issue is that the 3D forward and inversion methods haven't a more adaptive and rapid algorithm, meanwhile, the 3D visualization of electro-magnetic data is pro posed to adapt the platform used for visualization of seismic data. When expounding the development of integrative geophysical techniques of gravity, magnetic survey and electric survey,the paper emphasized the old integrative mode in the past that makes correlation and reference each other is no longer used,on the contrary,it must be a joint inversion based on 3D data, currently-studied joint inversion methods include constrained extrapolation method, anomaly-stripped method , sequential correction method and uniform correction method.