Analysis of Production Data from the Krafla Geothermal Field, Iceland
The Krafla geothermal field in northeastern Iceland consists of several zones, which contain fluids of different composition and thermodynamic state (Stefansson, 1981). In this paper they examine production data from wells which are completed in two-phase zones. Transient changes in flow rate and fl...
Main Authors: | , , |
---|---|
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Lawrence Berkeley National Laboratory
1983
|
Subjects: | |
Online Access: | https://digital.library.unt.edu/ark:/67531/metadc874159/ |
id |
ftunivnotexas:info:ark/67531/metadc874159 |
---|---|
record_format |
openpolar |
spelling |
ftunivnotexas:info:ark/67531/metadc874159 2023-05-15T16:47:03+02:00 Analysis of Production Data from the Krafla Geothermal Field, Iceland Pruess, K. Bodvarsson, G. S. Stefansson, V. United States. Department of Energy. Office of Energy Efficiency and Renewable Energy. 1983-12-15 345-350 Text https://digital.library.unt.edu/ark:/67531/metadc874159/ English eng Lawrence Berkeley National Laboratory National Energy Authority of Iceland, Reykjavik, Iceland rep-no: SGP-TR-74-46 grantno: AT03-80SF11459 osti: 889737 https://digital.library.unt.edu/ark:/67531/metadc874159/ ark: ark:/67531/metadc874159 Proceedings, Ninth Workshop Geothermal Reservoir Engineering, Stanford University, Stanford Calif., December 13-15, 1983 02 Petroleum Flow Rate Iceland Transients Geothermal Legacy Geothermal Legacy Reservoir Engineering Enthalpy Thermodynamics Krafla Geothermal Field Production 15 Geothermal Energy Fractured Reservoirs Permeability Article 1983 ftunivnotexas 2017-02-18T23:07:04Z The Krafla geothermal field in northeastern Iceland consists of several zones, which contain fluids of different composition and thermodynamic state (Stefansson, 1981). In this paper they examine production data from wells which are completed in two-phase zones. Transient changes in flow rate and flowing enthalpy are analyzed to obtain insight into relative (liquid and gas phase) permeabilities, and other reservoir parameters. Numerous studies have shown that predictions of geothermal reservoir behavior are strongly dependent upon the choice of relative permeability functions. There is an extensive literature on gas-oil and oil-water relative permeabilities, but steam-water relative permeabilities which are needed for geothermal reservoir analysis are poorly known. Laboratory experiments by Chen et al. (1978) and Counsil and Ramey (1979) have provided some data which, however, seem to be at variance with relative permeability characteristics deduced from field data by Grant (1977) and Horne and Ramey (1978). The differences may reflect uncertainties in the analysis methods used, or they may reflect ''real'' differences in relative permeability behavior of fractured reservoirs from that of porous medium-type laboratory cores. Recent theoretical work by Menzies (1982) and Gudmundsson et al. (1983) has substantiated the relative permeability characteristics obtained by Horne and Ramey (1978) for Wairakei wells. Article in Journal/Newspaper Iceland University of North Texas: UNT Digital Library Horne ENVELOPE(8.098,8.098,62.640,62.640) Krafla ENVELOPE(-16.747,-16.747,65.713,65.713) Menzies ENVELOPE(61.911,61.911,-73.437,-73.437) Stefansson ENVELOPE(-62.417,-62.417,-69.467,-69.467) |
institution |
Open Polar |
collection |
University of North Texas: UNT Digital Library |
op_collection_id |
ftunivnotexas |
language |
English |
topic |
02 Petroleum Flow Rate Iceland Transients Geothermal Legacy Geothermal Legacy Reservoir Engineering Enthalpy Thermodynamics Krafla Geothermal Field Production 15 Geothermal Energy Fractured Reservoirs Permeability |
spellingShingle |
02 Petroleum Flow Rate Iceland Transients Geothermal Legacy Geothermal Legacy Reservoir Engineering Enthalpy Thermodynamics Krafla Geothermal Field Production 15 Geothermal Energy Fractured Reservoirs Permeability Pruess, K. Bodvarsson, G. S. Stefansson, V. Analysis of Production Data from the Krafla Geothermal Field, Iceland |
topic_facet |
02 Petroleum Flow Rate Iceland Transients Geothermal Legacy Geothermal Legacy Reservoir Engineering Enthalpy Thermodynamics Krafla Geothermal Field Production 15 Geothermal Energy Fractured Reservoirs Permeability |
description |
The Krafla geothermal field in northeastern Iceland consists of several zones, which contain fluids of different composition and thermodynamic state (Stefansson, 1981). In this paper they examine production data from wells which are completed in two-phase zones. Transient changes in flow rate and flowing enthalpy are analyzed to obtain insight into relative (liquid and gas phase) permeabilities, and other reservoir parameters. Numerous studies have shown that predictions of geothermal reservoir behavior are strongly dependent upon the choice of relative permeability functions. There is an extensive literature on gas-oil and oil-water relative permeabilities, but steam-water relative permeabilities which are needed for geothermal reservoir analysis are poorly known. Laboratory experiments by Chen et al. (1978) and Counsil and Ramey (1979) have provided some data which, however, seem to be at variance with relative permeability characteristics deduced from field data by Grant (1977) and Horne and Ramey (1978). The differences may reflect uncertainties in the analysis methods used, or they may reflect ''real'' differences in relative permeability behavior of fractured reservoirs from that of porous medium-type laboratory cores. Recent theoretical work by Menzies (1982) and Gudmundsson et al. (1983) has substantiated the relative permeability characteristics obtained by Horne and Ramey (1978) for Wairakei wells. |
author2 |
United States. Department of Energy. Office of Energy Efficiency and Renewable Energy. |
format |
Article in Journal/Newspaper |
author |
Pruess, K. Bodvarsson, G. S. Stefansson, V. |
author_facet |
Pruess, K. Bodvarsson, G. S. Stefansson, V. |
author_sort |
Pruess, K. |
title |
Analysis of Production Data from the Krafla Geothermal Field, Iceland |
title_short |
Analysis of Production Data from the Krafla Geothermal Field, Iceland |
title_full |
Analysis of Production Data from the Krafla Geothermal Field, Iceland |
title_fullStr |
Analysis of Production Data from the Krafla Geothermal Field, Iceland |
title_full_unstemmed |
Analysis of Production Data from the Krafla Geothermal Field, Iceland |
title_sort |
analysis of production data from the krafla geothermal field, iceland |
publisher |
Lawrence Berkeley National Laboratory |
publishDate |
1983 |
url |
https://digital.library.unt.edu/ark:/67531/metadc874159/ |
long_lat |
ENVELOPE(8.098,8.098,62.640,62.640) ENVELOPE(-16.747,-16.747,65.713,65.713) ENVELOPE(61.911,61.911,-73.437,-73.437) ENVELOPE(-62.417,-62.417,-69.467,-69.467) |
geographic |
Horne Krafla Menzies Stefansson |
geographic_facet |
Horne Krafla Menzies Stefansson |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Proceedings, Ninth Workshop Geothermal Reservoir Engineering, Stanford University, Stanford Calif., December 13-15, 1983 |
op_relation |
rep-no: SGP-TR-74-46 grantno: AT03-80SF11459 osti: 889737 https://digital.library.unt.edu/ark:/67531/metadc874159/ ark: ark:/67531/metadc874159 |
_version_ |
1766037155693461504 |