A Parallel Processing Method for Prestack Time Migration

Abstract

The invention provides a prestack time migration parallel processing method and belongs to the field of seismic data processing in petroleum seismic exploration. The method is characterized in that a multi-process and multi-thread combined mode is adopted; data to be subjected to migration calculation are distributed to multiple calculation processes; according to each calculation process, multiple calculation threads are utilized to perform parallel calculation on the data; and a time direction circulatory division mode is performed on the data between the multiple calculation threads. With the prestack time migration parallel processing method of the invention adopted, prestack time migration processing calculation efficiency is improved, and large-scale parallel processing and dynamic load balance between nodes can be realized, and multi-core calculation ability and memory utilization rate inside the nodes can be brought into full play.

Description

technical field [0001] The invention belongs to the field of seismic data processing in petroleum seismic exploration, in particular to a pre-stack time migration parallel processing method. Background technique [0002] The main task of seismic exploration is to realize accurate imaging of geological bodies, and migration processing is the core technology of seismic imaging. At present, the most widely used in industry is the pre-stack time migration method. Among the pre-stack time migration methods, the Kirchhoff integration method has become the most popular method due to its high computational efficiency, strong adaptability, and adaptability to irregular observation systems in the field, especially for the low accuracy of the velocity model. Extensive offset methods. In areas with complex structures, it is very difficult to establish an accurate velocity model, and it is difficult to give full play to the advantages of pre-stack depth migration. Since pre-stack time ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the low computational efficiency of kirchhoff pre-stack time migration processing in the above-mentioned prior art and is not suitable for large-scale calculations, and to provide a parallel processing method for pre-stack time migration by utilizing multi-threaded parallel algorithms and task cycle division, solve the load balancing problem, improve computing efficiency and memory utilization, give full play to the hardware resources of each computing node, improve the computing efficiency and large-scale data adaptability of pre-stack time migration, and provide efficient and accurate data for seismic exploration. seismic imaging data

Images