Wabamun Formation
Wabamun Formation | |
---|---|
Stratigraphic range: Famennian PreꞒ Ꞓ O S D C P T J K Pg N | |
Type | Geological formation |
Sub-units | Crossfield Member |
Underlies | Exshaw Formation, Blairmore Group, Mannville Group |
Overlies | Graminia Formation (Winterburn Group) |
Thickness | up to 240 metres (790 ft)[1] |
Lithology | |
Primary | Limestone, dolomite |
Other | Anhydrite |
Location | |
Coordinates | 53°23′06″N 114°30′44″W / 53.3851°N 114.5123°W / 53.3851; -114.5123 (Anglo Canadian Wabamun Lake No. 1) |
Region | Alberta |
Country | Canada |
Type section | |
Named for | Wabamun Lake |
Named by | Imperial Oil, 1950 |
The Wabamun Formation is a stratigraphic unit of Late Devonian (Famennian) age in the Western Canada Sedimentary Basin.[2] It takes the name from Wabamun Lake and was first described in the Anglo Canadian Wabamun Lake No. 1 well (located between the Wabamun Lake and the North Saskatchewan River) by Imperial Oil in 1950.[3]
Lithology
The Wabamun Formation is composed of dolomitic limestone and calcareous dolomite with anhydrite interbeds. [1] Halite and anhydrite are present at the base of the formation in the Stettler region. It is composed entirely of limestone in north-western Alberta. Secondary pyrite is found at the top of the formation.
Hydrocarbon potential
The Wabamun Formation had an initial established recoverable oil reserve of 7.2 million m³, with 3.2 million m³ already produced as of 2008.[4] Gas reserves totaled 102.8 million m³, with 53.5 million m³ already produced.[5]
Distribution
The Wabamun Formation reaches a maximum thickness of 240 metres (790 ft) in the sub-surface of central Alberta.[1] It thins out and wedges towards the east, and thickens towards the Canadian Rockies foothills.
Relationship to other units
The Wabamun Formation is disconformably overlain by the Exshaw Formation in southern Alberta, by the Blairmore Group in western Alberta and by the Mannville Group in eastern Alberta. It rests conformably on the Graminia Formation siltstone of the Winterburn Group.[1]
In the Calgary area, the formation is divided into a lower and an upper part separated by the porous dolomitic Crossfield Member.
It is equivalent to the Three Forks Formation in Montana, the Palliser Formation in the Canadian Rockies, the sum of the Kotcho Formation and Tetcho Formation in northeastern British Columbia.
References
- ^ a b c d Lexicon of Canadian Geologic Units. "Wabamun Formation". Retrieved 2009-03-01.
- ^ Mossop, G.D. and Shetsen, I., (compilers), Canadian Society of Petroleum Geologists and Alberta Geological Survey (1994). "The Geological Atlas of the Western Canada Sedimentary Basin, Chapter 13: Devonian Wabamun Group of the Western Canada Sedimentary Basin". Retrieved 2014-10-18.
{{cite web}}
: CS1 maint: multiple names: authors list (link) - ^ Imperial Oil Limited, Geological Staff, Western Division, 1950. Devonian nomenclature in Edmonton area, Alberta, Canada. Bull. American Association of Petroleum Geologists, v. 34, p. 1807-1825.
- ^ Mossop, G.D. and Shetsen, I - Canadian Society of Petroleum Geologists (1994). "The Geological Atlas of the Western Canada Sedimentary Basin - Summary of oil reserves and production data". Retrieved 2009-03-06.
{{cite web}}
: CS1 maint: multiple names: authors list (link) - ^ Mossop, G.D. and Shetsen, I - Canadian Society of Petroleum Geologists (1994). "The Geological Atlas of the Western Canada Sedimentary Basin - Summary of gas reserves and production data". Retrieved 2009-03-06.
{{cite web}}
: CS1 maint: multiple names: authors list (link)
- v
- t
- e
- Oil sands and heavy oil
- Frontier exploration and development
- Natural gas liquids
- Natural gas
- Southern Alberta
- Central Alberta
- Northwestern Alberta Plains
- South-central Canadian Rockies foothills
- North-east Plains
- North-central foothills
- Liard River
- Fort Nelson
- Northern Rocky Mountains
- Fort St. John
- Saskatchewan
- Western Manitoba
- Paskapoo FM
- Scollard FM
- Wapiti GRP
- Smoky GRP
- Dunvegan FM
- Fort St. John GRP
- Bullhead GRP
- Nikanassin FM
- Fernie GRP
- Schooler Creek GRP
- Doig FM
- Montney FM
- Belloy FM
- Stoddart GRP
- Rundle GRP
- Banff FM
- Exshaw FM
- Wabamun FM
- Trout River FM
- Kakisa FM
- Redknife FM
- Woodbend GRP
- Beaverhill Lake GRP
- Elk Point GRP
- Canadian Shield
- Cypress Hills FM
- Porcupine Hills FM
- Ravenscrag FM
- Edmonton GRP
- Belly River GRP
- Oldman FM
- Foremost FM
- Pakowki FM
- Milk River FM
- Colorado GRP
- Mannville GRP
- Ellis GRP
- Rundle GRP
- Banff FM
- Exshaw FM
- Bakken FM
- Wabamun FM
- Crowfoot FM
- Nisku FM
- Ireton FM
- Leduc FM
- Cooking Lake FM
- Beaverhill Lake GRP
- Elk Point GRP
- Canadian Shield