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SAGD Application
Schlumberger DeepLook - CS Crosswell Seismic Imaging technology is established as a valuable and cost-effective tool in Oil Sands applications where Steam Assist Gravity Drain (SAGD) techniques are employed. Proven in a broad range of SAGD operations, Crosswell Seismic Imaging provides a number of benefits:
- Accurate mapping of steam chambers
- Clear delineation of shale lenses to 1 meter vertical resolution
- Ready identification of clean oil sand
- Ability to determine the structure of the overall reservoir, including small-scale faults, IHS beds, and discontinuities
- Ability to monitor the SAGD process over time,
identifying process problems, and geologic anomalies such as thief zones
Delineation Phase
- Outcrop of McMurray Oil Sands indicating detailed stratigraphy
In the delineation phase of a SAGD project, the high-resolution determination of formation characteristics generated by Crosswell Seismic Imaging provides for optimal well positioning. In addition, many companies involved in SAGD have engaged reservoir and process Crosswell Seismic Imaging monitoring projects to generate detailed information about reservoir conditions.
Crosswell Seismic Imaging has also been proven particularly effective at monitoring even slight changes in the reservoir when performed on a time lapsed basis. This detailed information is critical in designing and implementing a successful commercial SAGD project.
Monitoring and Post-Steam Diagnostics
Crosswell Seismic Imaging represents an outstanding tool for managing the steam-to-oil ratio by providing unmatched high-resolution monitoring of the steam-flood process. The technology is also used post-steam as a diagnostics tool, should a wellpair not perform as expected. The detailed information is used to determine the size and shape of the steam chamber and also provide a detailed look at the reservoir characteristics.