| Title | RLM-3D Multiphysics Inversion Modeling: De-Risking Resource Concept Models |
|---|---|
| Authors | Wolfgang SOYER, Randall MACKIE, Stephen HALLINAN, Federico Miorelli, Alice PAVESI, Stefano GARANZINI |
| Year | 2020 |
| Conference | Stanford Geothermal Workshop |
| Keywords | 3D inversion, modeling, geophysics, magnetotellurics, gravity, microearthquakes |
| Abstract | The use of geophysics in delineating geothermal resources has made significant recent progress with the arrival of cost-efficient, complete earth 3D inversion modeling to augment the earlier adoption of 2D and 1D approximations. From recent studies at high enthalpy, volcanic-hosted geothermal fields and prospects, we'll illustrate the results from both single domain and joint 3D inversion of magnetotellurcs, gravity and microearthquake datasets. The RLM-3D code efficiency now allows fast inversion runs on large and detailed meshes to include the critical response in MT and gravity from rugged topography and adjacent seas in many csaes. The inversion regularization allows faults and other horizons, where present, to be correctly represented by sharp breaks in the otherwise relatively smooth 3D models. Galvanic distortion and true dipole lengths are also included in the MT modeling and inversion, avoiding the ad hoc "corrections" applied to date re "MT static shifts". By accurately accounting for the real geological and topographic sources of geophysical data responses, we are now better equipped to quantitatively use all the available geophysical data to test, re-risk and update our working resource concept models. |