Simulation of the Krafla Geothermal Field
Simulation studies have recently been made of the Krafla Geothermal Field in Northern Iceland. The field is close to boiling in the formation at depths of 1800 meters and below. Two simulations were undertaken. The first studied radial flow, i.e., behavior around a production well. It was found that...
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Lawrence Berkeley Laboratory
1978
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ftunivnotexas:info:ark/67531/metadc1110460 2023-05-15T16:48:33+02:00 Simulation of the Krafla Geothermal Field Jonsson, V. 1978-08-01 63 pages Text https://doi.org/10.2172/6070476 https://digital.library.unt.edu/ark:/67531/metadc1110460/ English eng Lawrence Berkeley Laboratory rep-no: LBL-7076 grantno: W-7405-ENG-48 doi:10.2172/6070476 osti: 6070476 https://digital.library.unt.edu/ark:/67531/metadc1110460/ ark: ark:/67531/metadc1110460 Europe Flow Rate Geothermal Fields Iceland Cavities Pressure Measurement Boreholes Fluid Flow Geothermal Legacy Simulation Krafla Geothermal Field Geothermal Wells Mathematical Models 15 Geothermal Energy Permeability Temperature Measurement Wells Geothermal Legacy 150202* -- Geology & Hydrology Of Geothermal Systems-- Non-Usa-- (-1989) Report 1978 ftunivnotexas https://doi.org/10.2172/6070476 2021-03-06T23:08:17Z Simulation studies have recently been made of the Krafla Geothermal Field in Northern Iceland. The field is close to boiling in the formation at depths of 1800 meters and below. Two simulations were undertaken. The first studied radial flow, i.e., behavior around a production well. It was found that the relative permeability distribution of the liquid and vapor phase had very little effect on the general results. The simulation shows that while the well produced superheated steam after a few days of production, the superheated front moved only 1/10 the distance of the boiling front, which extended to a radial distance of over 200 meters after one-half year production. The second simulation investigated the two-zone system which is believed to exist in Krafla. This study simulated one well producing 50 kg/s from both zones for a period of 33 years. It showed that boiling in the formation begins near the production well and at the connection between the two zones. After 20 years, boiling takes place in the entire lower zone region with saturation (steam volume fraction) ranging from 0-30 percent. After 33 years, saturation increased to over 60 percent at the top of the lower zone, just under the caprock separating the two zones. Higher production rates will augment the spread of the saturation proportionately to the ratio of mass production. Report Iceland University of North Texas: UNT Digital Library Krafla ENVELOPE(-16.747,-16.747,65.713,65.713) |
institution |
Open Polar |
collection |
University of North Texas: UNT Digital Library |
op_collection_id |
ftunivnotexas |
language |
English |
topic |
Europe Flow Rate Geothermal Fields Iceland Cavities Pressure Measurement Boreholes Fluid Flow Geothermal Legacy Simulation Krafla Geothermal Field Geothermal Wells Mathematical Models 15 Geothermal Energy Permeability Temperature Measurement Wells Geothermal Legacy 150202* -- Geology & Hydrology Of Geothermal Systems-- Non-Usa-- (-1989) |
spellingShingle |
Europe Flow Rate Geothermal Fields Iceland Cavities Pressure Measurement Boreholes Fluid Flow Geothermal Legacy Simulation Krafla Geothermal Field Geothermal Wells Mathematical Models 15 Geothermal Energy Permeability Temperature Measurement Wells Geothermal Legacy 150202* -- Geology & Hydrology Of Geothermal Systems-- Non-Usa-- (-1989) Jonsson, V. Simulation of the Krafla Geothermal Field |
topic_facet |
Europe Flow Rate Geothermal Fields Iceland Cavities Pressure Measurement Boreholes Fluid Flow Geothermal Legacy Simulation Krafla Geothermal Field Geothermal Wells Mathematical Models 15 Geothermal Energy Permeability Temperature Measurement Wells Geothermal Legacy 150202* -- Geology & Hydrology Of Geothermal Systems-- Non-Usa-- (-1989) |
description |
Simulation studies have recently been made of the Krafla Geothermal Field in Northern Iceland. The field is close to boiling in the formation at depths of 1800 meters and below. Two simulations were undertaken. The first studied radial flow, i.e., behavior around a production well. It was found that the relative permeability distribution of the liquid and vapor phase had very little effect on the general results. The simulation shows that while the well produced superheated steam after a few days of production, the superheated front moved only 1/10 the distance of the boiling front, which extended to a radial distance of over 200 meters after one-half year production. The second simulation investigated the two-zone system which is believed to exist in Krafla. This study simulated one well producing 50 kg/s from both zones for a period of 33 years. It showed that boiling in the formation begins near the production well and at the connection between the two zones. After 20 years, boiling takes place in the entire lower zone region with saturation (steam volume fraction) ranging from 0-30 percent. After 33 years, saturation increased to over 60 percent at the top of the lower zone, just under the caprock separating the two zones. Higher production rates will augment the spread of the saturation proportionately to the ratio of mass production. |
format |
Report |
author |
Jonsson, V. |
author_facet |
Jonsson, V. |
author_sort |
Jonsson, V. |
title |
Simulation of the Krafla Geothermal Field |
title_short |
Simulation of the Krafla Geothermal Field |
title_full |
Simulation of the Krafla Geothermal Field |
title_fullStr |
Simulation of the Krafla Geothermal Field |
title_full_unstemmed |
Simulation of the Krafla Geothermal Field |
title_sort |
simulation of the krafla geothermal field |
publisher |
Lawrence Berkeley Laboratory |
publishDate |
1978 |
url |
https://doi.org/10.2172/6070476 https://digital.library.unt.edu/ark:/67531/metadc1110460/ |
long_lat |
ENVELOPE(-16.747,-16.747,65.713,65.713) |
geographic |
Krafla |
geographic_facet |
Krafla |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
rep-no: LBL-7076 grantno: W-7405-ENG-48 doi:10.2172/6070476 osti: 6070476 https://digital.library.unt.edu/ark:/67531/metadc1110460/ ark: ark:/67531/metadc1110460 |
op_doi |
https://doi.org/10.2172/6070476 |
_version_ |
1766038636315279360 |