ABSTRACT

The West Sable structure is a domal feature developed above a salt diapir. It is located at the western tip of Sable Island, 180 mi (290 km) southeast of Halifax, Nova Scotia. A total of eight wells have been drilled on the feature by Mobil Oil Canada, Ltd. and Texas Eastern Exploration of Canada, Ltd. Six tests are suspended oil and gas wells, one is a suspended gas well and the last well in the program, Sable Island 6H-58, is dry and abandoned. All wells drilled subsequent to Mobil - Tetco Sable Island E-48 have thinner pay sections than this discovery.

The dry gas, oil and gas/condensate zones at Sable Island E-48 and 1H-58 are located in Dawson Canyon and Logan Canyon sandstones of Upper and Lower Cretaceous age. At Sable Island 0-47, a gas-bearing zone was contacted in a Jurassic sandstone. The fluid content of the reservoirs has been confirmed by numerous production and drillstem tests.

Paleoecological studies suggest shallow-water deposition for the reservoir sandstones. The doming and faulting of the productive beds was the result of salt diapirism in Late Cretaceous - Early Tertiary times.