Permian-Pennsylvanian reservoirs, northern Denver basin

Conference · Mon Feb 01 04:00:00 EST 1988 · AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States)

OSTI ID:5953831

Maio, F

During the past three years the attention of Rocky Mountain operators has been focused on Permian-Pennsylvanian reservoirs in the Nebraska Panhandle. Relatively inexpensive drilling, a good wildcat success ratio, and impressive oil production have made the Northern Denver one of the most active areas in the Rockies during the current drilling slump. In early 1986 Celsius Energy and Sun Exploration and Production Company opened Bird field in Cheyenne County with the Livingston 1-33 pumping 180 bbl of oil/day from Missouri (Pennsylvanian) pay intervals. Celsius, as field operator, has offset the discovery with three additional producers. The best production has come from the McMillan 3-1 which has totaled 141,000 bbl of oil of 24/degrees/ API crude in the first nine months of pumping oil from intervals at 6839 to 6857 ft. The major Missouri reservoir at Bird field is a peloid skeletal lime packstone/grainstone with moldic and vugular dissolution porosity created by meteoric waters during subaerial exposure. All four wells at Bird field have an ooid/peloid lime grainstone Virgil (Pennsylvanian) reservoir behind production casing from 6650 to 6750 ft. Farther west in kimball County, Exxon is producing Wolfcampian (Permian) oil at Kleinholtz field. Six miles to the south, Sun has put its Prairie State 1 on pump, producing Wolfcampian oil and gas between 8300 and 8400 ft at an initial rate of 160 bbl of oil and 56 bbl of water. The Wolfcampian pay zones in Kimball County are anhydritic peloid skeletal dolomitic wackestone/packstones.

• Research Organization: Sun Exploration and Production, Dallas, TX (USA)
• OSTI ID: 5953831
• Report Number(s): CONF-880301-
• Conference Information: Journal Name: AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States) Journal Volume: 72:2
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
CARBONATE ROCKS
COLORADO
EXPLORATION
FEDERAL REGION VIII
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
MINERAL RESOURCES
NORTH AMERICA
PALEOZOIC ERA
PENNSYLVANIAN PERIOD
PERMIAN PERIOD
PETROLEUM DEPOSITS
RESERVOIR ROCK
RESOURCES
ROCKS
SEDIMENTARY BASINS
SEDIMENTARY ROCKS
USA