Sedimentology, sequence stratigraphy, and reservoir quality of the Lower Cretaceous Glauconitic Sandstone, southeastern Alberta.

摘要

The Lower Cretaceous (Albian) Glauconitic Sandstone is the lowermost stratigraphic unit of the Upper Mannville interval in southern Alberta. It overlies calcareous and fossiliferous strata of the Ostracode Limestone and is unconformably overlain by feldspathic and lithic-rich fluvial sandstone of the undifferentiated Upper Mannville. In the study area, Glauconitic Sandstone strata comprise three facies associations consisting of prograding shoreface to shallow shelf (FA1I), upper estuary channel fill (FA2) and tidally-influenced abandoned channel fill/interchannel (FA3) deposits.; The Jenner Upper Mannville E Pool is a 10 km long by 2 km wide north-south trending conventional oil pool located in Townships 19--20, Range 9W4 in southeastern Alberta. Since its discovery in 1963, the pool has produced 7.3 million barrels of 21.1° API oil and 6.7 billion cubic feet of gas from the Glauconitic Sandstone. The original oil in place is 28.6 mmbbl and estimated remaining reserves are of the order of 700 mbbl.