6:15 PM - 7:30 PM
[SEM33-P13] Development of resistivity modeling code designed to high-density electrical prospecting for cylindrical rock samples
Keywords:rock experiments, electrical resistivity, numerical simulations
Resistivity images are interpreted in relation between the porosity of rock and its connectivity with several mixing lows (e.g., Archie, 1942; Hashin and Shtrikman, 1962; Glover et al., 2000). In order to verify the applicability and scalability of such interpretations, we plan to carry out high-density electrical prospecting for rock samples whose other geophysical characteristics are well known.
As the first step of laboratory experiments, we have developed a numerical simulation code of DC method for cylindrically-shaped samples as a tool for feasibility studies. In our code, three dimensional finite-difference methods described in Dey and Morrison (1979) is modified for the cylindrical coordinate system.
For performance evaluation, the results of numerical experiment were compared with results of electrical prospecting to simulation sample (conductive plastic). As a result, we confirmed a cylindrical-shaped outer boundary is represented consistently by developed code. Also, we detected thin structure whose thickness is 1mm or less and estimated its resistivity by forward modeling.
In this presentation, we will report the results of comparison between numerical simulations and electrical prospecting to simulation sample.