Abstract：Prestack joint inversion of P-and S-waves makes full use of the prestack AVO information and other information provided by well logging, drilling and geological data, such as the structure, horizon, lithology information. So this approach can obtain more accurate elastic parameters of oil bearing lithology, and improve reservoir characterization. Gainan-Longwangmiao structural belt of Liaohe Oilfield is located in multiple sediment source junction area. Dongying formation reservoir changes greatly in lateral direction. It is difficult to identify spatial distribution and the source direction of hydrocarbon-bearing sand bodies. This directly affects sedimentary system analysis. Conventional seismic inversion cannot meet the requirements of sand body distribution prediction. Therefore, we have conducted prestack joint inversion of P-and S-waves with rock physics analysis. The results show that this approach has obtained abundant elastic parameters and revealed the reservoir distribution.
