Seismic data processing shot gather wave equation prestack depth deviation parallel calculating method

Abstract

The invention relates to the key technology in the data processing of the oil and earthquake exploration which provides the earthquake data of the subtly geological structure description. The technology includes: (1) the cannon path collecting wave field extrapolated figure in the mix field; (2) the master-slave dynamic load balance parallel algorithm of the cannon path collecting wave field extrapolation; (3) the breakpoint recovery method of the parallel algorithm. The invention has improved the figure precision of the wave equation pre-fold depth excursion to proper for the land data processing; the parallel algorithm can use the free source and increase the work computing efficient. The breakpoint recovery method can not waste the pre-processing work, so it can shorten the processing period.

Description

Technical field:

[0001] Wave equation prestack depth migration is a key technology in the process of petroleum seismic exploration data processing, which can realize accurate imaging of complex geological structures and provide seismic data with fine geological structure description for oil and gas geophysical exploration. Background technique:

[0002] Most of the current oil and gas geophysical exploration targets have very complex geological structures. Conventional seismic data imaging methods cannot complete geological tasks well. Wave equation pre-stack depth migration has become an effective means for imaging complex geological structures. In the industrial seismic data processing software, most of them use the integration method with high calculation efficiency and good observation adaptability for pre-stack depth migration, but its imaging accuracy is low. The wave field extrapolation imaging of the shot gather wave equation developed in recent years, the wave field...

Images