Wattenberg field produces from a large gas accumulation (1.1 Tcf estimated recoverable reserves) in the “J” sandstone of Cretaceous age. The trap was formed in the delta-front environment of a northwesterly prograding delta.
The gas is contained in a stratigraphic trap straddling the axis of the Denver basin. Reservoir characteristics are poor, and fracturing by artificial means is necessary to test a well.
Large extensions to the field may be made in the future by following the trend of the delta-front environment. Industry exploration efforts will be dependent on gas-price economics.