Pinnacle Reef Reservoirs, Zeta Lake Member, Nisku Formation (Upper Devonian) West Pembina Area Alberta, Canada
Published:January 01, 1980
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D. A. Pounder, E. R. Venour, L. Tremblay, 1980. "Pinnacle Reef Reservoirs, Zeta Lake Member, Nisku Formation (Upper Devonian) West Pembina Area Alberta, Canada", Carbonate Reservoir Rocks, Robert B. Halley, Robert G. Loucks
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The first Nisku Formation discovery (Fig. 1) in the West Pembina area was made in January 1977 with the drilling of a seismic anomaly which was interpreted as an isolated reef. To early 1980, forty-five additional isolated reefs had been discovered in the West Pembina area.
The location of the area and the generalized regional geology is shown in Figure 1. The area is located on the eastern homocline of the Alberta Basin. Regional dip to the southwest is about 70 feet per mile. The block diagram (Fig. 2) illustrates the stratigraphic relationships of the West Pembina pinnacle reef area in the Winterburn Basin as it would appear with upper Nisku strata removed. The Nisku Formation in the West Pembina area is divided into five members (Fig. 3). The pinnacle reefs are designated the Zeta Lake Member. The off-reef sequence consists of four members named the Lobstick and Bigoray (lower Nisku) and the Cynthia and Wolf Lake (upper Nisku).
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Carbonate Reservoir Rocks
This core workshop is the product of an effort by the SEPM Carbonate Research Group to emphasize the value of careful core interpretation to hydrocarbon exploration and production programs. Initially conceived as a small conference the format was expanded in response to strong interest from the geologic community. The end result was a workshop including 14 core displays. The notes were intended as a guide but the thorough documentation of these cores will be of interest to many others.