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Developments in eastern and northwestern Colorado in 1979

Michael R. Root
Developments in eastern and northwestern Colorado in 1979
AAPG Bulletin (September 1980) 64 (9): 1484-1489


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 1,227 wells in 1978 to 1,021 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.

ISSN: 0149-1423
EISSN: 1558-9153
Coden: AABUD2
Serial Title: AAPG Bulletin
Serial Volume: 64
Serial Issue: 9
Title: Developments in eastern and northwestern Colorado in 1979
Author(s): Root, Michael R.
Affiliation: Amoco Prod. Co., Denver, CO, United States
Pages: 1484-1489
Published: 198009
Text Language: English
Publisher: American Association of Petroleum Geologists, Tulsa, OK, United States
Accession Number: 1981-017037
Categories: Economic geology of energy sources
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: tables, sketch map
N37°00'00" - N41°00'00", W109°00'00" - W102°00'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute.
Update Code: 1981
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