Method and device for realizing binning homogenization in three-dimensional seismic data processing

Abstract

The invention discloses a method and a device for realizing binning homogenization in three-dimensional seismic data processing. The method comprises the following steps: acquiring a three-dimensional seismic data gather and dividing the data gather by using a certain geophone offset as an interval; executing DMO composition on a seismic trace in each interval to obtain DMO composition data volumes; carrying out interpolation trace filling processing of missed seismic traces on each DMO composition data volume so as to obtain corresponding trace filling processing data volumes; along a preset direction, carrying out DMO<-1> processing on each trace filling processing data volume; and forming the data volumes processed by the DMO<-1> into a new gather used for subsequent time offset processing before composition. The invention also discloses a method and a system of the time offset processing before composition of the three-dimensional seismic data. The invention eliminates the influences of the geophone offset, azimuth angles, binning sizes and seismic trace covering times, realizes the homogenization of the binning and guarantees the sufficient utilization of the data and the reduction of subsequent processing workloads.

Description

technical field [0001] The present invention relates to the technical field of seismic exploration, in particular to a method and device for realizing bin homogenization in three-dimensional seismic data processing, and a pre-stack time migration processing method and system for three-dimensional seismic data. Background technique [0002] In seismic exploration, in order to determine the subsurface geological structure, it is necessary to convert the seismic data recorded in the field into a form that is convenient for geological interpretation, that is, convert the data on the tape into a corrected seismic record section similar to that shown by the geological structure. Generally speaking, the CMP (Common Middle Point) method is the most common method used in the field at present, and CMP gathers are the most common seismic data. [0003] Seismic data processing consists of three basic stages: deconvolution, stacking, and migration. Among them, deconvolution is to achiev...

AI Technical Summary

Problems solved by technology

Through the above precise binning scheme, the convergence of binning and coverage times can be achieved simply and accurately; however, the gathers obtained after binning are very large, which greatly affects the subsequent pre-stack time migration processing efficiency, but also caused a large amount of processing resource consumption

[0012] It can be seen that, in the prior art, there is no proper technical solution for bin homogenization in the process of 3D seismic data processing

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