Nonlinear inversion for electrical resistivity tomography

作者：Yan Yong Li^*; Chen Ben Chi; Zhao Yong Gui; Chen Yun; Ma Xiao Bing; Kong Xiang Ru

来源：Chinese Journal of Geophysics, 2009, 52(3): 758-764.

• Electrical resistivity tomography (ERT)
• Probability tomography
• alpha center method
• Genetic algorithm
• Nonlinear inversion

The paper develops a 2-D nonlinear inversion approach for electrical resistivity tomography survey by using probability tomography, alpha centers, and genetic algorithm. First, the distribution scopes of anomalous bodies and the positions as well as coefficient ranges of alpha centers are determined based on the results of multiple superimposed probability tomography. Secondly, we use alpha centers method to numerical simulation of 2-D electrical structures and the intensity coefficients of alpha centers are obtained by the genetic inversion algorithm. Last, the resistivity distribution is reconstructed by using alpha center method. To test the effectiveness of the approach, several models of 2-D anomalous bodies imbedded in half homogeneous space are used to implement inversion and the results are satisfactory.

• 出版日期2009-3
• 单位中国科学院地质与地球物理研究所兰州油气资源研究中心; 中国科学院地质与地球物理研究所