Applying Flowrate Type Curves to Geysers Steam Wells

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Dimensionless flowrate type curves were applied to steam wells at The Geysers in an attempt to quantify reservoir properties and to predict flowrate decline. Although data scatter was a problem, the flowrate data was smoothed by a normalization routine based on the back-pressure equation and the wells were modeled by dimensionless functions for a radial system with a infinite or finite outer boundary and a constant pressure inner boundary (composite analytical-empirical type curve). The “match” resulted in a unique D{sub i} value for use in Arps’ equation and a permeability-thickness product (kh) comparable to kh values obtained from pressure buildup ... continued below

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29-36

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Enedy, Steve January 20, 1987.

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Description

Dimensionless flowrate type curves were applied to steam wells at The Geysers in an attempt to quantify reservoir properties and to predict flowrate decline. Although data scatter was a problem, the flowrate data was smoothed by a normalization routine based on the back-pressure equation and the wells were modeled by dimensionless functions for a radial system with a infinite or finite outer boundary and a constant pressure inner boundary (composite analytical-empirical type curve). The “match” resulted in a unique D{sub i} value for use in Arps’ equation and a permeability-thickness product (kh) comparable to kh values obtained from pressure buildup analysis. Finally, it was shown that at least four years of data is required to obtain a unique b value. 2 tabs., 12 refs., 12 figs.

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29-36

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  • Proceedings, Twelfth Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, Calif., January 20-22, 1987

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  • Report No.: SGP-TR-109-6
  • Grant Number: AT03-80SF11459
  • Grant Number: AS07-84ID12529
  • Office of Scientific & Technical Information Report Number: 888494
  • Archival Resource Key: ark:/67531/metadc885326

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  • January 20, 1987

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  • Sept. 21, 2016, 2:29 a.m.

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  • Nov. 22, 2016, 7:30 p.m.

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Enedy, Steve. Applying Flowrate Type Curves to Geysers Steam Wells, article, January 20, 1987; United States. (digital.library.unt.edu/ark:/67531/metadc885326/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.