Ross Lake 3C-3D Seismic Survey and VSP, Saskatchewan: A preliminary interpretation

Chuandong (Richard) Xu, Robert R. Stewart

The Ross Lake oil field, operated by Husky Energy Inc, is located in southwestern Saskatchewan, Township 13 Range 17 West of 3rd Meridian. The producing reservoir is interpreted to be a Cretaceous age channel sand in the Dimmock Creek member of the Cantuar formation of the Mannville Group.

There are 4 vertical wells in our area of interest, 10-25, 11-25, 14-25 and 15-25. There is also one horizontal well drilled in the channel sandbody. The sand is over 30 m thick in the 11-25 well and there is about 12-13 m of oil pay. There is no gas cap.

Currently, only well 15-25 and the horizontal well are producing, the others being shut-in. The produced oil is heavy, about 13 degrees API.

The pool is on primary production and there is no waterflood. The reservoir strategy is not complete yet. Husky is observing the horizontal well to see if the pool will be economic. If so, there could be additional horizontal wells.

A 3C-3D seismic survey was conducted in May, 2002 by Veritas Geophysical. In addition, the CREWES Project acquired a multi-offset VSP survey in June, 2003. Our goal is to combine the VSP, well-logs, and 3C-3D surface seismic survey to achieve a full reservoir description.