The first petroleum stratigraphic test in the Hudson Bay Basin, Sogepet-Aquitaine Kaskattama Province No. 1, was drilled in 1966 and 1967. Located in Manitoba on the southwestern coast of Hudson Bay, at latitude 57° 04′ 18.487″ and longitude 90° 10′ 29.408″, the well reached a total depth of 2941 ft after drilling 2913 ft of Phanerozoic strata and 28 ft of crystalline Precambrian. Besides Ordovician and Silurian rocks, Upper? Silurian and Devonian rocks hitherto only observed as drift and rubble in the Hudson Bay Basin, were penetrated. The most promising reservoir rock is the Middle Silurian Attawapiskat Formation, an intensely reefal and porous unit 236 ft thick.
Reconnaissance surveys were made by Sogepet Limited in 1963 and 1964 of Southampton, Coats and Mansel islands in northern Hudson Bay. These surveys examined the Phanerozoic rocks and resulted in the discovery of oil shale on Southampton Island.