Call Us :   (403) 444-8181
  • Language:

  Depth Imaging  

Depth migration yields higher spatial and vertical resolution compared to time migration. The final stack of depth migration is in depth (meters or feet) and provides more accurate positioning of geological structures both horizontally and vertically. Typically, depth migration starts with the final velocity model of time migration and iteratively updates the velocity model by means of tomographic refinement. The interpreter’s guidance is of vital important to ensure the velocity model is reasonable and compliant with the geology.

Geo-X supports both model-based and grid-based approaches or a combination of both for building a velocity/depth model. Enhanced anisotropy tools are used to accurately image the subsurface geology. A solution is obtained by integrating interpretation, velocity analysis, model building, time-to-depth conversion, depth migrations, and model verifications and updating.

Stacks and gathers are viewed with multiple QC and visualization tools in an iterative workflow to solve traveltime errors and refine velocity models. An initial velocity model is used and depth migration is run to create migrated gathers and stacks. The gathers may be conditioned and then residual moveouts (RMO) are obtained through automatic picking on the gathers. Tomography uses this information along with dip, azimuth and continuity of reflecting surfaces to update the velocity model which is then used in an updated depth migration.