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Open-File Report 2009–1049

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

#### By Philip H. Nelson and Eric L. Hoffman

| Abstract
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
-  **Report** PDF (1.2 MB) 
-  **Plate** PDF (816 kB)   
-  **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 ResourcesBox 25046, Mail Stop 939Denver, CO 80225http://energy.cr.usgs.gov/

Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge. |
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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.

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### Contents

Abstract

Introduction

Geological Setting

Completion Procedures

Well Selection and Data-Processing Procedures

Discussion

Summary

Acknowledgments

References Cited

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U.S. Department of the Interior |            U.S. Geological Survey           	URL: *http://pubsdata.usgs.gov/pubs/of/2009/1049/index.html*            Page Contact Information: GS Pubs Web Contact           	Page Last Modified: Wednesday, 07-Dec-2016 21:52:06 EST