Staggered-grid Finite-difference Method For Seismic Modeling

In our country, the petroleum mothball resources are mainly distributed in mountain area, loess plateau, desert, gobi etc. Further more, these areas are very complicated not only on surface but also under ground. The excitation and receiving both are difficult and it is difficult to get the correct image of structure. So fine design field setup is needed. With optimization construction design, using objective evaluation evaluate the effective of different field setup explore for complex geology body, let seismic results to the greatest extent practical approximation of the underground, raise quality seismic data acquisition in complex district.This article is the part of ShengLi Oil Filed Geophysics Exploration Company's project'Seismic acquisition configuration-Seisway'in 2002. From work on programming the acquisition software, gradually expanded and improved the new technology in seismic acquisition and finish part of software about management. In 2004 February, Sinopec take this project as the Scientific and technological project in the company, Invest to support research. In 2005 December,'seisway'pass the software test take by"ShangDong province software test center", now the first version has used by many oil field. In the Sinopec's assessment of projects in 2006 June, it rated as outstanding.In this article, at first introduce seismic forward modular, based on data girding, do the method of geophysical modeling, realization complex geological model. It facilitates to do human-computer interaction handling, and its data structure Facilitate post-processing.Based on the method of modeling, forward model methods are show. High-order staggered finite-difference, including boundary condition (perfect matched layers), stability and degree of accuracy, and ray-tracing, includingshooting method, iterative ray-tracing, eikonal equation method. The effective of computation fast and have high accuracy of those method meet the need。Based on the Algorithm of the method, introduce function of the software, the apply effective of human-computer interaction handling, finite-difference and ray-tracing. The"seismic acquisition configuration"software, make up for the existing seismic design software shortcomings, enforce ability of design for seismic exploration. It works as the plate for the progress of collection design and seismic exploration.