直流电阻率测深中二维与三维反演结果的对比与分析  

AN ANALYTICAL COMPARISON BETWEEN 2D AND 3D INVERSIONS IN DC RESISTIVITY SOUNDING

作　　者：黄俊革[1] 阮百尧[1] 

机构地区：[1]桂林工学院资源与环境工程系,广西桂林541004

出　　处：《物探与化探》2004年第5期447-450,共4页Geophysical and Geochemical Exploration

基　　金：国家自然科学基金项目(No.40064001);教育部优秀青年教师基金项目

摘　　要：直流电阻率测深中,用二维反演程序对三维地质体进行了反演,并与三维反演结果进行对比和分析。首先,对比二维和三维最小二乘反演在正演模拟算法和先验信息的确定方法;然后,对若干比较典型的模型进行反演实例对比。由于二维程序反演仅考虑单个剖面的电阻率信息,无论是在异常位置、形态及电阻率特性上,其反演精度都比较低;三维电阻率反演综合了多个测深剖面的电阻率信息,其结果与实际模型吻合得非常好。The results of 3D inversion are analytically compared with the results of applying 2D inversion program to conducting inversion of 3D geological bodies in DC resistivity sounding. The methods for modeling and confirmation of prior information are compared, followed by a comparative analysis of several inversion examples of typical models. In 2D inversion, the precision of location, shape and resistivity is relatively low in that only single section information is taken into consideration. The results of 3D inversion are in good accord with the practical models because such an inversion has synthesized the information of several sections.

关 键 词：电阻率测深 二维 三维 反演 

分 类 号：P631.3[天文地球—地质矿产勘探]