Nonisothermal Injectivity Index can Infer Well Productivity and Reservoir Transmissivity

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In geothermal wells injection tests are commonly used to obtain well and reservoir data. These tests are typically conducted in a series of step rates followed or preceded by a complete shutin. Usually the temperature of the injected fluid is different from that of the reservoir fluid. Because of the strong temperature dependence of fluid viscosity and to a lesser extent, fluid density, nonisothermally related pressure responses must be considered. The nonisothermal isjectivity index obtained from these tests depends on the mobility ratio of the cold region to the hot reservoir and the extent of the cold spot. This paper ... continued below

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211-216

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Sigurdsson, Omar; Bodvarsson, Gudmundur S. & Stefansson, Valgardur December 15, 1983.

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In geothermal wells injection tests are commonly used to obtain well and reservoir data. These tests are typically conducted in a series of step rates followed or preceded by a complete shutin. Usually the temperature of the injected fluid is different from that of the reservoir fluid. Because of the strong temperature dependence of fluid viscosity and to a lesser extent, fluid density, nonisothermally related pressure responses must be considered. The nonisothermal isjectivity index obtained from these tests depends on the mobility ratio of the cold region to the hot reservoir and the extent of the cold spot. This paper proposes a method which accounts for these effects and relates the nonisothermal injectivity index to the isothermal injectivity index.

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211-216

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  • Proceedings, Ninth Workshop Geothermal Reservoir Engineering, Stanford University, Stanford Calif., December 13-15, 1983

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  • Report No.: SGP-TR-74-26
  • Grant Number: AT03-80SF11459
  • Office of Scientific & Technical Information Report Number: 889594
  • Archival Resource Key: ark:/67531/metadc884921

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  • December 15, 1983

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  • Sept. 21, 2016, 2:29 a.m.

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  • Feb. 16, 2017, 7:20 p.m.

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Sigurdsson, Omar; Bodvarsson, Gudmundur S. & Stefansson, Valgardur. Nonisothermal Injectivity Index can Infer Well Productivity and Reservoir Transmissivity, article, December 15, 1983; United States. (digital.library.unt.edu/ark:/67531/metadc884921/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.