The Devonian Grosmont Formation in northeastern Alberta, Canada is the world's largest accumulation of heavy oil in carbonate rocks. The presented paper described the interpretation of the legacy seismic data sets to integrate the surface features of this formation. Results from this work were able to define the surface as a mature karsted surface within observable features such as dolines, karst valleys, karst plain and poljie and a ridge. It is important for future oil prospectors to map and avoid areas such as the poljie, dolines and karst valley to increase certainty of reservoir presence.


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