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Calculation of Estimated Ultimate Recovery (EUR) for Wells

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Calculation of Estimated Ultimate Recovery (EUR) for Wells

Postby mrgmm » Tue Feb 17, 2015 12:44 pm

Calculation of Estimated Ultimate Recovery (EUR) for Wells in Continuous-Type Oil and Gas Accumulations

Abstract
The calculation of Estimated Ultimate Recovery (EUR) from oil and gas production data of individual wells and the development of EUR distributions from all producing wells in an assessment unit are important steps in the quantitative assessment of continuous-type hydrocarbon resources. The U.S. Geological Survey has developed a method of calculating EURs for wells in continuous-type accumulations, including coalbed gas accumulations. The EUR distribution of producing wells is used as a guide for the estimation of an EUR distribution for potential wells in areas of undiscovered resources

Introduction
The U.S. Geological Survey (USGS) assesses two categories of hydrocarbon accumulations: conventional and continuous. A conventional oil or gas accumulation is characterized by a discrete field in which the hydrocarbons are buoyant upon a water column with a well-defined hydrocarbon-water contact. In the assessment of undiscovered conventional accumulations, the emphasis is placed upon the sizes and numbers of discovered accumulations as a guide to the sizes and numbers of undiscovered accumulations. In continuous-type hydrocarbon accumulations (also referred

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