Developments in Four Corners-Intermountain area in 1978

Journal Article · Wed Aug 01 04:00:00 EDT 1979 · Am. Assoc. Pet. Geol., Bull.; (United States)

OSTI ID:6728500

Baars, D L

Exploratory drilling in the Four Corners-Intermountain area (Arizona, Utah, Nevada, western New Mexico, and southwestern Colorado) decreased slightly in 1978, with Utah having the greatest decline. The success rate also showed a decline from 18.9% in 1977 to 17.1% in 1978, but the total footage drilled increased 5%. Development drilling grew 23%, with most of the activity centered in the San Juan basin of northwestern New Mexico, where the success rate remained at 94%. Development drilling remained active in the Aneth area, the Uinta basin, and the Overthrust Belt in Utah. The most significant new-field discoveries were in Utah's Summit Co. in the Overthrust Belt. The largest oil and gas discoveries were from the Jurassic Nugget Sandstone and Twin Creek Limestone, respectively. The first of six offshore wildcats in the Great Salt Lake was abandoned in basement rocks. Leasing and geophysical activities remained high in the Overthrust Belt from Idaho to Arizona, with geophysical activity increasing in the Paradox fold and fault belt in southeastern Utah and southwestern Colorado; greater wildcat-drilling activity is expected to follow.

• OSTI ID: 6728500
• Journal Information: Am. Assoc. Pet. Geol., Bull.; (United States), Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Vol. 63; ISSN AAPGB
• Country of Publication: United States
• Language: English

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