Structure-controlled 3D anisotropic CSEM inversion with crossgradient criterion
What is it about?
Conventional 3D anisotropic CSEM resistivity inversion typically produces models of horizontal and vertical resistivity that are completely different in structure and inconsistent with geological structure. This poses major challenges in frontier exploration for hydrocarbons. Now, by using the crossgradient criterion and statistically independent a priori information (resistivity well logs and seismic horizons), we produce models that are structurally similar, conform to seismic structure and match resistivity well logs (hence more accurate) than otherwise possible. We demonstrate the usefulness of this workflow in a deepwater exploration campaign.
Why is it important?
1) This approach help reduce uncertainty in subsurface exploration for hydrocarbons and reserve estimation, especially in complex terrains. 2) The resulting models can be used to build low- frequency seismic velocity models, via appropriate rockphysics transform, for subsequent processing of PSDM data or seismic full waveform inversion (FWI).
The following have contributed to this page: Max Meju
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