An Assessment of the Impact on Depth Uncertainty of Different Velocity Models

IV-3 AN ASSESSMENT OF THE IMPACT ON DEPTH UNCERTAINTY OF DIFFERENT VELOCITY MODELS N.J. CRABTREE O. ALLEN L.J. WEST and M. BEASLEY Abstract 1 The problem of assessing the uncertainty of depth predictions calls for a thorough investigation of all valid methods and techniques. A combination of different methods such as interval velocity crossplotting instantaneous velocity curve fitting and kriging can be used to generate an optimum velocity model for time-to-depth conversion. When choosing an optimum velocity model one particular method has to be chosen at the expense of other nearly equivalent methods. A rigorous estimation of uncertainty needs to