Abstract

In the Judy Creek oil field, the subsurface Swan Hills Member limestones are composed of frame-building stromatoporoids associated with solenoporid algae and tabulate corals, skeletal grains with local pellets and rare intraclasts, micrite, sparry calcite, and void space. Thirty-two diamond cores, 330 thin sections, and 150 acetate peels were examined petrographically to determine grain origin, grain/micrite ratios, types of fossils, and genetic history. The Swan Hills Member is divisible into nine informal stratigraphic units, of which the rock types and depositional environments are described, as well as the geometry and structure of this carbonate bank.

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