Two-component processing and interpretation case history: Crystal East, central Alberta

Armin W. Schafer and Wen Tzeng

ABSTRACT

The Crystal East two-component survey was shot as two separate surveys into the same spread-layout, the vertical component survey and the radial component survey. Three lines were shot in total, using l kg dynamite charges as sources.

The data processing sequence used in processing the seismic survey is outlined in this report, with particular emphasis on the processing of the radial component data. The processing sequence employed is the sequence presently in use for converted-wave surveys at the CREWES data processing center.

The ability of the seismic data to detect a Viking sandstone channel is examined using the final stacked seismic sections. Almost no evidence of an amplitude anomaly on the Viking reflector is present on either component of the three lines. However, using the ratio of P-wave traveltime to S-wave travetime, or gamma-T ratio; derived from interval times on the radial and vertical component stack sections, serves to properly delineate the channel.

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