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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 43 (1959)

Issue: 6. (June)

First Page: 1379

Last Page: 1388

Title: Developments in Arizona and Western New Mexico in 1958

Author(s): Harrell Budd (2)

Abstract:

The year 1958 recorded the first drilling decline in more than 10 years in Arizona and western New Mexico. In all, 877 wells were drilled, a decrease of 11.2% from the 1957 all time high of 988 holes. New-field and new-pool wildcatting resulted in 19 new discoveries and extensions with a success ratio of 18.6%. The success ratio for all types of exploratory wells was 29.3%, higher than average for the area and the nation.

Exploration in the San Juan basin was directed toward stratigraphic traps in the various Cretaceous units particularly the Gallup and Dakota formations. Exploration in Arizona and west-central New Mexico was directed toward Paleozoic carbonates particularly Pennsylvanian sediments.

The most significant developments during the year were the establishment of the Gallup formation as a major oil reservoir in some shallow parts of the San Juan basin, and the definition of the Dakota formation as a major gas and condensate reservoir in the deeper parts of the San Juan basin, and the first oil discovery in a new producing zone in northeastern Arizona.

There was a 170% increase in oil production due to completion of the Four Corners pipeline to the west coast. There was a 3% decrease in gas production during 1958.

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