Developments in eastern and northwestern Colorado in 1979. [Tabular data and map]

Journal Article · Mon Sep 01 04:00:00 EDT 1980 · Am. Assoc. Pet. Geol. Bull.; (United States)

OSTI ID:6952446

Root, M R

Exploratory drilling in eastern and northwestern Colorado decreased from 574 wells in 1978 to 427 in 1979. The success rate for exploratory wells increased from 12.5% in 1978 to 20.8% in 1979. Development drilling decreased from 653 wells in 1978 to 594 in 1979. In the Denver basin, 312 exploratory wells were drilled during 1979 with 16.0% success. In northwestern Colorado, 68 exploratory wells were drilled with 47.1% success. Southeastern Colorado had a 14.9% success from 47 exploratory wells drilled. Total drilling in the area decreased from 1227 wells in 1978 to 1021 in 1979. The overall success rate increased from 47.5% in 1978 to 51.4% in 1979. Lower Cretaceous Muddy D and J sandstones, Upper Cretaceous Sussex and Shannon sandstones, and Upper Cretaceous Niobrara Chalk were the primary objectives in the Denver basin. Cretaceous and Tertiary units were the main targets in northwestern Colorado, and Paleozoic strata remained the objective in southeastern Colorado.

• Research Organization: Amoco Production Co., Denver, CO
• OSTI ID: 6952446
• Journal Information: Am. Assoc. Pet. Geol. Bull.; (United States), Journal Name: Am. Assoc. Pet. Geol. Bull.; (United States) Vol. 64:9; ISSN AAPGB
• Country of Publication: United States
• Language: English

Related Subjects

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020200* -- Petroleum-- Reserves
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03 NATURAL GAS
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CENOZOIC ERA
COLORADO
CRETACEOUS PERIOD
DRILLING
EXPLORATION
EXPLORATORY WELLS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
INDUSTRY
MESOZOIC ERA
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PETROLEUM DEPOSITS
PETROLEUM INDUSTRY
RESOURCES
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ROCKY MOUNTAIN REGION
SANDSTONES
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TERTIARY PERIOD
USA
WELL DRILLING
WELLS