Pre-Stack Joint Inversion Method Based on Reflectivity Method

Compared with the traditional prestack AVO inversion method, the prestack inversion method based on reflectivity method can simulate the full wave field, and is more suitable for the inversion analysis of thin interbedded reservoirs and seismic records with wide incident angle. However, the usual reflectivity inversion method is only the analysis and research of PP wave seismic records, and the obtained density parameters are often not accurate. However, the density parameters play a very important role in the identification of fluid in oil and gas reservoir, the calculation of fluid saturation and the prediction of fractures in reservoir. Therefore, the research on PS wave seismic records full of density information is particularly important. Based on the careful analysis of the basic formula of reflectivity method, this paper realizes the research of prestack joint inversion based on reflectivity method. While studying PP wave, PP wave and PS wave joint inversion method can make full use of PS wave seismic records full of density information and effectively improve the inversion resolution. The two-dimensional noisy simulation data well prove the advantages of the joint prestack inversion method based on reflectivity method in improving the stability and resolution of inversion.