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Open-File Report 2009–1049

Gas, Water, and Oil Production from the Wasatch Formation, Greater Natural Buttes Field, Uinta Basin, Utah

By Philip H. Nelson and Eric L. Hoffman


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Gas, oil, and water production data were compiled from 38 wells with production commencing during the 1980s from the Wasatch Formation in the Greater Natural Buttes field, Uinta Basin, Utah. This study is one of a series of reports examining fluid production from tight gas reservoirs, which are characterized by low permeability, low porosity, and the presence of clay minerals in pore space. The general ranges of production rates after 2 years are 100–1,000 mscf/day for gas, 0.35–3.4 barrel per day for oil, and less than 1 barrel per day for water. The water:gas ratio ranges from 0.1 to10 barrel per million standard cubic feet, indicating that free water is produced along with water dissolved in gas in the reservoir. The oil:gas ratios are typical of a wet gas system. Neither gas nor water rates show dependence upon the number of perforations, although for low gas-flow rates there is some dependence upon the number of sandstone intervals that were perforated. Over a 5-year time span, gas and water may either increase or decrease in a given well, but the changes in production rate do not exhibit any dependence upon well proximity or well location.

First posted March 31, 2009

  • Downloads Directory
    Contains an electronic copy of Appendix 1: List of wells, and average daily production rates of gas, oil, and water at initial and 5-year times. Well locations from Utah Division of Oil, Gas, and Mining (2008).

For additional information contact:

Team Chief Scientist,
USGS Central Energy Resources
Box 25046, Mail Stop 939
Denver, CO 80225

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Suggested citation:

Nelson, P.H., and Hoffman, E.L., 2009, Gas, water, and oil production from the Wasatch Formation, Greater Natural Buttes field, Uinta Basin, Utah: U.S. Geological Survey Open-File Report 2009–1049, 19 p., 1 plate.




Geological Setting

Completion Procedures

Well Selection and Data-Processing Procedures




References Cited

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