Post-stack attribute analysis of the 9C seismic survey - Olds, Alberta

Vladan Simin

Seismic attribute analysis was performed on the Olds 9C-2D line. Data around twowells, one with 6% porosity and the other one with tight, bedded dolomite, on the line were compared. Quality of data varied between different component stacks with P-P,P-SV, SH-SH, and P-SH chosen for the analysis. This analysis was two-fold - comparison of attributes around the two wells and comparison of stacked sections using FXTRAN program (Schoepp and Margrave, 1996). Top of Wabamun signal strength on instantaneous amplitude display tends to dim with increased porosity but increases inside the reservoir. Instantaneous frequency tends to be more continuous in tight low porosity carbonates. Frequency spectrum analysis clearly shows reduction in frequency from P-wave to pure SH-wave sections. Converted compressional to horizontal shear section has enough coherent signal to suggest anisotropy at the zone of interest.