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.
Figures & Tables
North American Oil and Gas Fields
With three previous volumes published by AAPG on structure of American oil fields, this publication takes 17 of these oil fields and describes them in detail. The reservoirs described in these 17 papers range in age from Devonian to Pleistocene; their litholgies are standstone, limestone, or dolomite; and the trapping mechanisms are structural or stratigraphic or a combination of the two. The North American oil fields described are distributed from Alaska and the McKenzie Delta area of Canada on the northwest, to the Gulf of Mexico and Southern Floriday on the southeast. This publication also includes an index to those North American oil and gas fields which have been described in previous AAPG publications.