Velocity Model Building

Build velocity models from prestack data in vertical update- and horizon- consistent update modules

The VMB plugin is used for picking RMO velocities from migrated pre-stack gathers. RMO velocities are used to update the (3D) velocity model in PSDM work flows. VMB supports picking on semblance gathers and picking of pre-stack events for input to the PSDM-Tomographic plugin. Two VMB modules are supported: vertical update and horizon-consistent update. The actual creation of velocity models is performed in OpendTect Base. Models are constructed from combinations of gridded / smoothed RMO velocities, interval velocities and 3D body velocities.

VMB is designed to support multiple PSDM systems. All structures needed to interface a PSDM system to OpendTect – VMB are released in the Open Source domain.