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After a decade (1962-72) of relatively slow petroleum activity in Utah, the past 10 years have seen a substantial increase. Although the production of petroleum has steadily declined since 1975, the number of wells drilled has generally increased from year to year.
The petroleum activity is centered mainly in four different areas within the state: the Paradox basin (southeastern Utah); the Uncompahgre uplift (central eastern Utah); the Uinta basin (northeastern Utah); and the thrust belt area (northeast central Utah).
The Paradox basin includes 43 oil and gas fields that primarily produce from the Paradox Formation. The Uncompahgre uplift includes 23 fields, most of which produce gas from the Dakota-Cedar Mountain formation. The Uinta basin includes 58 fields with over 95% of the production coming from the Green River and Wasatch Formations. The thrust belt area includes nine fields that produce condensate and gas almost entirely from the Twin Creek and Nugget formations.
Drilling activity in the first three areas has been relatively constant, with in-fill operations within known fields accounting for most of the drilling. The thrust belt has been the center of increasing activity since the initial Pineview discovery in 1975.
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