Abstract

ABSTRACT The Pinedale anticline, located in the northern part of the Green River basin of Wyoming, contains a large accumulation of overpressured natural gas within a low-permeability sequence of Upper Cretaceous rocks. The geologic factors which control the gas accumulation can be used to create a quantitative model of the accumulation. Such a model was constructed for the Pinedale anticline and used for a resource estimation. Within this 197 mi2 [317 km2] structure, the 10,000 ft [3048 m] section of overpressured rock is estimated to contain 159 tcf [4.50x1012 m3] of in-place natural gas in the sandstone reservoirs, although only a small part of this resource may be recoverable.

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