A Seismic Reservoir Characterization Work Flow for Reducing Risk Utilizing AVO, Simultaneous Prestack Inversion, and Rock Physics

In this paper, an integrated seismic-based reservoir characterization work flow is presented which includes fluid substitution, AVO modeling, prestack simultaneous inversion, and lithology and petrophysical property prediction. Forward modeling is normally the most effective way to commence an AVO analysis, which begins with determining the fluid response by calculating seismic velocity and offset-dependant reflectivity changes due to different fluid saturations. The investigation of amplitude variations with offset seeks to extract information about the reservoir rock by measuring changes in amplitude with varying incident angle. Next, the seismic data are analyzed in order to determine whether a conditioning process must...