关键词: 三分量地震技术, 转换波, 资料处理, 弹性阻抗

Abstract: For the serious heterogeneity of Xujiahe reservoir of Upper Triassic in Guang'an area, Sichuan, China, it is hard to accurately predict the gas-bearing intervals using conventional P-wave seismic prospecting technique. 3-C seismic prospecting technique can be used to get more subsurface information and better identify the features of reservoir rocks and fluids, hence decreasing the multi-resolution from it. Based on the high-quality 3-C seismic data available, several seismic processing techniques such as converted wave static correction, transfer point computation, converted wave velocity analysis and dynamic correction are used for obtaining abundant wavefield information and distinctive features of wave groups in this paper. And the composite interpretation of P-wave impedance inversion profile and converted wave elastic impedance inversion profile has allowed to effectively predict the distribution of favorable reservoir rocks and gain some preliminary results in this area.

Key words: 3-component seismic prospecting technique, converted wave, data processing, elastic impedance