Inversion and interpretation of multicomponent seismic data: Willesden Green, Alberta

Roxana Maria Varga, Robert R. Stewart, John C. Bancroft

In this paper, 2D multicomponent seismic data and well logs from the Willesden Green, Alberta area are used to investigate potential oil reservoir intervals. The Upper Cretaceous (Turonian) Second White Speckled Shale (2WS) and Cardium formations are the zones of interest in this study. PP and PS synthetic seismograms generated from the well logs provide a reasonable correlation with the multicomponent surface seismic data. PP and PS inversion was applied to the vertical and radial components to yield P impedance and S impedance. The Vp/Vs estimate shows anomalous values over the zones of interest around the producing wells: 8-13-41-6W5; 8-26-41-6W5 and 6-15-41-6W5 and are helpful for productive zones and sand/shale discrimination.