Key Technologies Of Processing & Interpretation Of Multi-component Seismic Data And Its Application

The method of multi-component seismic is a new technique in recent years,make use of the abundant data and the different characteristics of p and sv, to research and investigate the subsurface structure and reservoir.Beacuse of the effect of converted wave dissymmetrical ray path and anisotropy,the rule processing and interpretation methods do not use multi-component seismic processing,what is more,there is many technologic difficulty.This method belong to the applied foundation research and have practical value.The anisotropic multi-component seismic data forward modeling research aims at complicated geologic model, developing finite difference forward modeling method,and researching the anisotropy forward modeling.The forward modeling of ken71 thin alternate layer model prove this method is right.The difficulties of multi-component seismic data processing are converted wave dissymmetrical ray path and anisotropy.This text gives the method calculating converted point and time-distance relation,and put forward the high accuracy velocity analysis,stack and prestack time migration etc. processing technique.The polarization filtering can aim at dissimilar noise type ,making use of the different polarization direction to inhibit noise;The common converted point sorting gather method calculate converted point by time window;The converted wave NMO and stack use the parameters:p velocity,sv velocity and p/sv vertical velocity ratio etc.; The converted wave static correction carry on by two steps,first make use of the p-wave shot point static correction quantity to calculate static correction quantity of converted wave shot point,then make use of the p-wave receiver static correction quantity to calculate static correction quantity of converted wave receiver;The converted wave prestack time migration is base on stack velocity model ,and optimize the migration velocity model using common image point gather , and resolve the problem calculating converted point.The multi-component seismic mostly use comprehensive interpretation application,the text resolve multi-component seismic data comprehensive interpretation application problem by horizon identification and calibration,anisotropy analysis,AVO,attribute abstraction and reservoir predication etc.technique. The horizon identification and calibration use the time and depth domain data,and increase the applied credibility of comprehensive interpretation;The AVO method use p-wwave and p-sv wave characteristic to contribute to more accurately interpret the reservoir and the fluid characteristic, raising credibility;The fast-slow shear wave time-difference analysis and anisotropy analysis contribute to knowledge reservoir internal structure and distinguish flooded area and oil remaining area.