组合二维高密度数据的三维反演效果研究

将二维采集的高密度电阻率数据组合成三维数据体进行三维反演,是一种为克服三维高密度电阻率法工作成本高,二维高密度电阻率法反演效果差而提出的新设想,很多仪器及软件生产商诸如美国AGI、重庆奔腾等都提供了相应的设备或软件模块,但其应用效果却鲜有报道.本文通过理论联系实验的手段,分析当前主流应用软件ResInv、EarthImager给出的编程算法,说明高密度电阻率法数据三维反演算法较之二维反演的优势所在;再以鲁中某工地的实验数据为例,分别对数据进行三维反演和传统的二维反演.实验结果表明无论在异常位置、形态、电性反应方面,三维反演取得效果都与实际情况更加吻合.虽然也存在一些不足,但仍不失为一项值得应用的高密度电阻率法资料处理方法.

The Study on the Three-dimensional Inversion Effect of Composed Two-dimensional High-density Dataset

The three-dimensional inversion of high-density resistivity dataset which is com bined by two-dimensional high-density resistivity data is a new approach to solving the problems, such as the high cost of three-dimensional high-density resistivity method and the bad inversion effect of two-dimensional high-density resistivity method. Many instru- ments and software manufacturers, such as the AGI in United States, BTSK in Chongqing China, provide the equipment and software modules with this function, but its application results have been reported rarely. In this paper, theories are combined with experiments to analyze the programming algorithm given by ResInv and EarthImager. It proves the advan- tage of the three-dimensional inversion. Furthermore, taking experimental data of Shang- dong as an example, three-dimensional inversion and traditional two-dimensional inversion have been done. The experimental results showed that three-dimensional inversion effect is more consistent with the actual situation in terms of abnormal position, morphology, and electrical response. Although there are some shortcomings, this new approach is a worthy application in high-density data processing.