Developments in eastern and northwestern Colorado in 1978

Journal Article · Wed Aug 01 00:00:00 EDT 1979 · Am. Assoc. Pet. Geol. Bull.; (United States)

OSTI ID:5498501

Poleschook, D Jr

Exploratory drilling in eastern and northwestern Colorado increased from 357 wells drilled in 1977 to 574 in 1978. The success rate for exploratory wells decreased from 19.6% in 1977 to 12.5% in 1978. Development drilling decreased from 783 wells in 1977 to 653 in 1978. In the Denver basin, 820 wells were drilled during 1978 with 46.8% success. There were 129 wells drilled in southern Colorado with 25.6% success. Northwestern Colorado had a 59.7% success in 278 wells drilled. Total drilling in the report area increased from 1140 wells in 1977 to 1227 in 1978. The overall success rate decreased from 59.2% in 1977 to 47.5% in 1978. Lower Cretaceous Muddy D and J sandstones, Upper Cretaceous Sussex and Shannon sandstones, and Upper Cretaceous Niobrara Chalk were the main objective reservoir rocks in the Denver basin. Paleozoic rocks remained the major objective in southeastern Colorado, and Cretaceous and Tertiary units were the objectives in northwestern Colorado. 1 figure, 3 tables.

• Research Organization: Amoco Production Co., Denver, CO
• OSTI ID: 5498501
• Journal Information: Am. Assoc. Pet. Geol. Bull.; (United States), Vol. 63:8
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
COLORADO
NATURAL GAS WELLS
OIL WELLS
WELL DRILLING
CRETACEOUS PERIOD
EXPLORATORY WELLS
NATURAL GAS
PALEOZOIC ERA
PETROLEUM
RESERVOIR ROCK
ROCKS
SANDSTONES
DRILLING
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
GEOLOGIC AGES
MESOZOIC ERA
NORTH AMERICA
ROCKY MOUNTAIN REGION
SEDIMENTARY ROCKS
USA
WELLS
020200* - Petroleum- Reserves
Geology
& Exploration
030200 - Natural Gas- Reserves
Geology
& Exploration