Method for converting seismic data from the time domain to the depth domain

摘要

A method is used to convert seismic data between bounding upper and lower surfaces in the time domain to the depth domain. An upper depth surface corresponding to the upper time surface is determined, either from well data or by time-depth conversion of the upper time surface. An interval velocity value is determined for each seismic sample between the bounding time surfaces from velocity data generated from well logs. The seismic times between the bounding time surfaces are then converted to the depth domain by adding the thickness of each seismic sample to the upper depth surface, wherein the thickness of each seismic sample is a function of the seismic sample rate and interval velocity value for each seismic sample. The seismic attribute values from the converted seismic data can be interpolated to a linear depth sampling.