Oil and gas developments in eastern and northwestern Colorado in 1981

Journal Article · Mon Nov 01 00:00:00 EST 1982 · Am. Assoc. Pet. Geol., Bull.; (United States)

OSTI ID:6223374

Ziegler, J R

Exploratory drilling in eastern and northwestern Colorado increased from 423 wells in 1980 to 696 wells in 1981. The success rate for exploratory wells increased from 28.8% in 1980 to 32.5% in 1981. Development drilling increased from 678 wells in 1980 to 885 wells in 1981. In the Denver basin, 527 exploratory wells were drilled during 1981 with a success rate of 31.3%. In northwestern Colorado, 100 exploratory wells were drilled with a success rate of 48.0%, and in southeastern Colorado 69 exploratory wells had an 18.8% success rate. Total drilling in the area was up 44% from 1980 with 1581 wells drilled in 1981. The overall success rate increased from 40.7% in 1980 to 59.4% in 1981. In the Denver basin, the greatest number of discoveries was made in the Lower Cretaceous Muddy J sandstone. Lower Cretaceous Muddy D sandstone, Upper Cretaceous Sussex sandstone, Codell sandstone, and Niobrara Chalk were also primary objectives. Cretaceous objectives were the primary targets in northwestern Colorado, and Pennsylvanian Morrow sandstones were the primary objectives in southeastern Colorado.

• OSTI ID: 6223374
• Journal Information: Am. Assoc. Pet. Geol., Bull.; (United States), Vol. 66:11
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
COLORADO
NATURAL GAS FIELDS
OIL FIELDS
NATURAL GAS DEPOSITS
OIL WELLS
PRODUCTION
PETROLEUM DEPOSITS
CRETACEOUS PERIOD
EXPLORATION
EXPLORATORY WELLS
NATURAL GAS WELLS
RESERVOIR ROCK
SANDSTONES
FEDERAL REGION VIII
GEOLOGIC AGES
GEOLOGIC DEPOSITS
MESOZOIC ERA
MINERAL RESOURCES
NORTH AMERICA
RESOURCES
ROCKS
SEDIMENTARY ROCKS
USA
WELLS
020200* - Petroleum- Reserves
Geology
& Exploration
030200 - Natural Gas- Reserves
Geology
& Exploration
020300 - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing