The algorithm flow of generating 3D seismic data volume in Tarim area by using acoustic equation

Abstract

According to the real geology background of Tarim foreland basin we build 3D seismic data volume of Tarim area by using 3D arbitrary difference precise integration (ADPI) algorithm. It is very beneficial for the processing and explanation of 3D seismic material of Tarim area. Compared with conventional differential method, the 3D ADPI algorithm greatly improves the precision by using local integral semi-analytical method in time domain to get the recursion operator of wave equations. And we adopt stable factor constraints, thus the stability of calculation gets much better. By using an improved adaptive absorbing boundary and the parallelization of serial program, the time consuming of 3D forward modeling is greatly reduced. In the research we gathered 300 shots' Omni-directional seismic data volume. The whole data volume approximates 2T. Compare the geology model with actual seismic records we find 3D ADPI forward modeling can accurately show the structure and layers information of geology model. In complex region it can describe geology structure and seismic physical parameters such as amplitude, frequency, phase and so on.