CREWES channel model: Description, acquisition, interpretation and data release

Heather J. E. Lloyd and Gary F. Margrave


The CREWES Channel Model was created in 2008 as a 3D volume of P and S wave velocities plus density. This 3D model represents a 120m channel interval with gradient overburdens derived from the Blackfoot field in Southern Alberta, Canada. The channel w as modelled after the present day Bow River and so represents no specific buried channel, but is thought to be typical. Recently this model was used t o create a synthetic seismic data using a fully elastic finite difference software package. The data set contains over 1525 shot records with 3C recei vers placed on a 10m by 10m grid for each shot. A 2-D line was then selected from the data as an example and to identify its processing flow. This flo w includes a bulk time shift of 0.1 seconds, a mute to remove the first breaks, and a F-K filter to remove the ground roll. A pre-stack Kirchhoff migr ation was then applied to the data creating a section showing undulations in the reflections indicating variations in the channel interval. This data set is very large and is available to sponsors by request.

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