Abstract
ABSTRACT The economically important basal Belly River is defined and its general nature described. Sand reservoirs in the Belly River Formation are capable of economic gas production in Alberta and Saskatchewan despite their characteristically high clay content. Many instances of disappointing production may be explained by limited reservoir, washed-out sands and, most frequently, mud damage. To illustrate their reservoir qualities the production history and the configuration, composition and mechanical-log character of Belly River sands from several localities are described. These localities are sufficiently widespread to give a general picture not only of the sands, but of the types of hydrocarbon traps in the Belly River Formation, which are: updip sand pinchouts into marine shale, gentle structures involving widespread sands, stratigraphic traps in fluvial sands.
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