SMALL FIELD ASSESSMENT

Probabilistic estimates of recoverable oil and gas in accumulations smaller than 1 MMBO or 6 BCFG of gas were made separately. The method for small field estimation in this assessment is essentially the same as that used by Mast and others (1989) and described by Root and Attanasi (1993). The estimates were based on extrapolations of numbers of fields in field-size classes smaller than the play-analysis cutoffs (1 MMBO, 6 BCFG) using a log-geometric model. The minimum size estimated was 32,000 barrels of oil and 192,000 cubic feet of gas. Estimates were made for provinces.

U.S. Geological Survey Circular 1118