To Image in Depth or in Time? That is the question

P064 TO IMAGE IN DEPTH OR IN TIME? THAT IS THE QUESTION MIKE GOODWIN and MICK SUGRUE GX Technology EAME Ltd. Lawrence House 45 High Street Egham Surrey TW20 9DP UK Introduction 1 Prestack depth migration (PSDM) is employed by many oil companies to address a host of seismic imaging challenges associated with complex geologic conditions such as steep structural dips rapid lateral velocity variations and undulating surface topography. However there are many cases where prestack time migration (PSTM) either zero-offset or full Kirchhoff finite-offset might be sufficient for simpler imaging problems or where the additional cost and time required