In higher temperature geothermal settings, the petrophysical relationships between the critical attributes (density, velocity and resistivity) vary greatly across the range of primary lithologies, and are compounded by secondary alteration. Seeking a quantitative and practical approach to integrated modeling of disparate geophysical data types, we discuss using a structural similarity constraint, through 3D crossgradient joint inversion. The examples here look at resistivity and density inversions in a graben setting, including the use of tears in the smoothing regularization, to better represent sharper discontinuities, where consistent with the observed data.
Note: This paper was accepted into the Technical Program but was not presented at the 2020 SEG Annual Meeting.