Oil And Gas Reservoir The Fluid Substitution And AVO Analysis Based On BISQ Mechanism

AVO(amplitude versus incidence angle) technology has became the core technology of oil and gas reservoir prediction. Currently, AVO technology cannot effectively highlight the fluid parameters in fluid containing reservoir which is only based on the single phase medium. Actually, the reservoir is composed of solid phase and fluid,which is a typical multiphase medium. Multiphase medium in seismic wave propagation is very complex because it not only influence solid phase but also pore fluid。 Therefore, it has great significance to the study of AVO analysis technology in multiphase medium by using multiphase medium model. For the purpose of above research, this article has carried out the research on the AVO analysis technology based on the Reformulated BISQ model.In this paper, the fluid displacement analysis is based on BISQ model,with the comparison with the traditional Gassmann fluid replacement method. what’s more,The Reformulated BISQ model is deduced based on(not including the jet length) the AVO equation; the parameters and the series were simplified which is based on the establishment of different types of oil and gas reservoir model; the BISQ-AVO curve was simulated and analyzed. Based on the simplified BISQ-AVO equation, the BISQ-AVO intersection analysis and the traditional AVO analysis were compared.The results show that the AVO analysis of multiphase medium which considering the porosity of the medium are quite different from it which is derived by the traditional AVO analysis,.The result of AVO analysis with using the method in this paper is more reasonable and comprehensive than that derived of the traditional AVO analysis. In all,the results of this study have theoretical guiding significance for seismic amplitude interpretation of oil and gas reservoirs...