Image-Guided Tomography (IGT)
Image Guided High Resolution Tomography using Offset-Dependent Picking
Image-Guided Tomography (IGT) is an approach which yields high-resolution velocity updates that are more geologically plausible near faults and layering.
IGT is an approach to generating high-resolution velocity models through tomography which limits the impact of simplifications introduced by traditional tomography.
As a result timely, accurate, and geologically reasonable models can be produced. First, offset-dependent picking can be used to track events in gathers better than curvature-based picking, particularly in areas of complex geology and anisotropy. This implementation can allow quicker and simpler gather flattening and reveals fine detail in models.
The application of image-guided interpolation as a preconditioning step within the inversion process leads to updates which automatically respect geological structures observed in stacked images. When implemented within a current tomography flow, these refinements make generation of high-resolution velocity models reasonable without trade-offs in computation time or accuracy.