Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

Using a boundary element method, a numerical scheme of 2.5-D resistivity modeling with a point source is presented for surface and cross-hole response of a simple 2-D anomalous body in homogeneous half-space. BEM, in which the number of elements is reduced dramatically because the original volume problem is converted to a boundary problem, is simpler and faster and requires less memory and computing time than FDM and FEM. The accuracy of 2.5-D resistivity modeling algorithm is validated by comparing BEM computations with those from analytic solutions and FEM computations for an infinite dike. For the dike model, the error of BEM range from 0.01 percent to 1.3 percent and is less than those of FEM.