ABSTRACT: Recent Upper Cretaceous "Parkman" and "Sussex" Discoveries, Weld County, Colorado

Douglas J. Gwon, L. Roger Hutson, Theodore D. Sheldon

During 1983 the first commercial "Parkman" (Upper Cretaceous Larimer Sand) production was established in Colorado with Prima Oil & Gas' (successor to Golden Buckeye Petroleum) Dinner 15-1 well, completed pumping 107 BOPD, 30 BWPD. Subsequently, several other operators have discovered nine additional Parkman fields. A total of about 30 Parkman wells have been completed to date. Several of these wells may produce in excess of 100,000 bbl oil from depths of about 3600 ft.

During the 1980s several interesting developments occurred in exploration and development of the "Sussex" (Upper Cretaceous Terry) sandstone reservoirs in the Denver basin.

AAPG Search and Discovery Article #91002©1990 AAPG Rocky Mountain Section Meeting, Denver, Colorado, September 16-19, 1990