Data waveform processing method in seismic exploration

Abstract

The invention discloses a data waveform processing method in a seismic exploration, and the data waveform processing method in a seismic exploration is based on a three dimensional free surface multiple prediction method of a wave equation. The Data waveform processing method is used for the three dimensional surface multiple predictions in the process of the seismic exploration information. A graphic processing unit (GPU) is used for speeding up the fully three dimensional surface multiple prediction algorithm, namely, the GPU and the CPU are coordinated for calculation. Operations with intensive calculation are transferred to the GPU to carry out the calculation; higher calculation efficiency is available, the algorithm is capable of processing the earthquake information from the complicated underground medium. The method takes the space effect into account that a refection point, the shot point and an acceptance point are not in the same line. And the method also considers a two-dimensional algorithm which is superior to the convention. A simple approximation over the underground medium is unnecessary, therefore, the fully three dimensional free surface multiple prediction algorithm based on the wave equation accords to the true conditions of the underground medium so that the amplitude and the phase of the seismic data multiple wave can be exactly predicted.

Description

technical field [0001] The present invention relates to the field of geophysical prospecting, in particular to a method for processing waveforms of geophysical prospecting data, in particular to a method for predicting three-dimensional surface multiple waves based on a graphics processor using a feedback iterative method, and the method is applied to three-dimensional surface in seismic prospecting data processing Multiple forecasts. Background technique [0002] Abundant oil and gas resources are stored in the sea area, but the seismic data of marine exploration often contain abundant and strong surface multiple waves. The existence of multiple waves will affect the migration imaging effect of seismic data, cause misunderstandings about seismic data interpretation and underground structure, and further affect the deployment of exploration wells and the success rate of exploration. Therefore, in order to improve the signal-to-noise ratio of marine seismic exploration data,...

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Problems solved by technology

[0003] The above two-dimensional method can be effectively applied to the prediction and suppression of surface multiple waves of a survey line, but it cannot be effectively applied to three-dimensional seismic exploration data because the spatial effect of seismic wave propagation in the subsurface medium is not considered

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