Simultaneous Joint Inversion of Seismic, Gravity, and EM Data for Subsalt Depth Imaging in Gulf of Mexico

This paper illustrates an advanced process for integration: 3D simultaneous joint inversion (SJI) of seismic, electromagnetic, and gravity data to better define the base salt in the Green Canyon-Garden Banks-Keathley Canyon-Walker Ridge areas. SJI enhances the ambition of improving the existing velocity models for prestack depth migrations and the consistency of seismic and non-seismic representations of the subsurface in complex salt geometries. We produced a new structural framework with renewed interpretations of the allochthonous and autochthonous salt, providing new tools for interpretation of the complex salt, reducing inversion uncertainties, and most importantly, defining a new strategy for subsalt interpretation, thereby enhancing the role of non-seismic methods as supporting complex seismic depth imaging.