Recent gas resource assessments for the Triassic of the Western Canada Sedimentary Basin suggest that one-half of reserves remain undiscovered. The most promising play in this interval is the Halfway/Doig ＇＇Shelf＇＇ in northeastem British Columbia, with estimated reserves of 4 tcf gas (112 x 10(9)m(3)). Most of the emphasis in this play has focused on the Halfway Formation. To our knowledge, no major study of a Doig reservoir has been completed within this play. The Buick Creek Field in northeastern British Columbia represents the largest recognized Doig reservoir in the Fort St. John area, with 5 oil pools containing 20 million bbls of oil (3.2 x 10(6)m(3)) and 12.5 bcf of associated gas (0.35 x 10(9)m(3)). All pools lie on the same stratigraphic level and exhibit depositional continuity. Twenty-two wells have core within the Doig Formation in the Buick Creek Field area. Due to the abundance of core available in the field (similar to 550 m), facies associations and depositional processes for the Doig interval can be determined directly, based on observed physical characteristics. Nine sedimentary facies have been recognized and are grouped into three facies associations: (1) offshore/shelf, (2) shoreface, and (3) offshore transition. All production at Buick Creek is from facies association 2. This unit typically consists of fine-grained, massive to structureless sandstone and erosively overlies facies association 1. This basal surface is interpreted to be a regressive surface of marine erosion which developed during falling relative sea level. The sandstones are abruptly overlain by facies association 3 across a pronounced transgressive surface of erosion marked by a coarse pebble lag. The sandstones of the Buick Creek Field are interpreted to represent a lowstand shoreface. This characterization is a predictive depositional model which can be used to guide future hydrocarbon exploration.