Alberta's conventional crude oil reserves declined 8% or 264 million bbl to 2.9 billion bbl in 1991 from 1990, the provincial Energy Resources Conservation Board reports.
ERCB data show the province had a 9 year supply of conventional crude remaining at current production levels as of Dec. 31, 1991.
The board also estimated Alberta has 3.6 billion bbl of undiscovered reserves. The level of recovery will depend on economics and advances in technology.
The report said there was no replacement of the 101 million bbl of synthetic crude produced in 1991. There also was no replacement of 42 million bbl produced in 1991 from in situ operations, mainly at Cold Lake, Alta.
Alberta gas production also exceeded replacement levels in 1991, but there is a continuing surplus of gas. ERCB estimated Alberta reserves at 57.7 tcf, a 17 year supply at current production levels.
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