Estimating time-shifts per event and per trace in seismic data

摘要

A method for calculating time-shifts associated with travel-times of seismic waves emitted by a source and recorded by plural seismic detectors after reflection from a subsurface structure. The includes receiving seismic data that includes plural traces related to a subsurface, wherein the seismic data is in a time-space domain; transforming with a processor the seismic data from the time-space domain to a radon domain; picking linear events from the seismic data in the radon domain; calculating the time-shifts associated with the picked linear events; correcting the seismic data based on the time-shifts to obtain new seismic data; and computing an image of the subsurface based on the new seismic data. The time-shifts are calculated per trace and per event. The method allows linear events that are affected by trace to trace time shifts to be filtered out, and this has applications in noise attenuation, spatial interpolation/regularisation, residual statics, cold water statics, and positioning inaccuracies.