Analysis of multicomponent walkaway vertical seismic profile data

Bona Wu, Donald C. Lawton, Kevin W. Hall

A multicomponent walkaway VSP dataset was processed to for PP and PS imaging as well to study the AVO response. To date, a PP wave corridor stack and VSP-CDP mapping have been completed and are correlated to synthetic seismograms. Overall, we see a good correlation between VSP and synthetic data, and observed changes inside the reservoir, interpreted to be due to production. A common shot stack reflectivity gather was produced for AVO analysis. At the top and bottom of target reservoir, the AVO responses of VSP PP wave data and synthetic gathers show similar trends. The results give us promise for inverting walkaway VSP data for reservoir properties.