Abstract
A tidal influence on deposition of the Middle and Upper McMurray oil sands occurs at all scales, from mm to 30 + meters thick; and few 10s of meters to 10s of kilometers laterally. Recognition of tidal signatures is important for reservoir characterization to aid in bitumen extraction from surface mining and for in situ technologies. This paper synthesizes largely scattered, previous government work into a regional overview. The Alberta Energy Regulator is also adopting a new geological-based characterization of plays for oil-sand deposits, using play-based defined areas of the Athabasca deposit. Key factors for play-analysis are the facies associations and their distinction.
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