Using Geological Constraints to Improve Velocity Model Building for Depth Imaging in Frontier Areas - Case Studies.
C.E. Benson, P. Esestime and M. Cvetkovic
Event name: 77th EAGE Conference and Exhibition 2015
Session: Seismic Imaging - Case Histories I
Publication date: 01 June 2015
Info: Extended abstract, PDF ( 3.08Mb )
Price: € 20
Frontier areas may have limited or sparsely distributed non-seismic data sources available with which to provide some geological constraints for velocity model building. Our approach uses limited well data available to develop a velocity-stratigraphy relationship, and then combine this with the interpretation of key horizons from the time migrated seismic datasets to produce initial, constrained velocity models for use in the depth imaging, velocity model building process. This is a collaborative approach between geoscientists and geophysicists, and has yielded some significant imaging improvements compared to the use of unconstrained velocity models, and found to still be of benefit in areas with severe restrictions to available well data.