Numerical studies of silica precipitation/dissolution
In this paper we describe our numerical simulator PIC (pressure-temperature-chemistry), and also present the methods we use to reduce error due to numerical diffusion. Examples of the application of this approach to two problems are included. The first problem involves non-isothermal flow of supersa...
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Lawrence Berkeley Laboratory
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ftunivnotexas:info:ark/67531/metadc1100932 2023-05-15T16:50:11+02:00 Numerical studies of silica precipitation/dissolution Lai, C.H. Bodvarsson, G.S. Witherspoon, P.A. 1985-01-01 10 pages Text https://digital.library.unt.edu/ark:/67531/metadc1100932/ English eng Lawrence Berkeley Laboratory other: DE85008511 rep-no: LBL-18440 rep-no: CONF-850107-4 grantno: AC03-76SF00098 osti: 5986818 https://digital.library.unt.edu/ark:/67531/metadc1100932/ ark: ark:/67531/metadc1100932 10. annual workshop on geothermal reservoir engineering, Stanford, CA, USA, 22 Jan 1985 Chalcogenides Separation Processes Silicon Oxides Geothermal Legacy Geothermal Legacy Dissolution Mathematical Models Silicon Compounds Oxides Production Oxide Minerals Fluid Withdrawal 15 Geothermal Energy Geothermal Systems Hydrothermal Systems Energy Systems Silica Oxygen Compounds Minerals Precipitation Article 1985 ftunivnotexas 2019-06-22T22:07:57Z In this paper we describe our numerical simulator PIC (pressure-temperature-chemistry), and also present the methods we use to reduce error due to numerical diffusion. Examples of the application of this approach to two problems are included. The first problem involves non-isothermal flow of supersaturated silica through single fractures. The precipitation of silica in the fractures is modeled and the resulting permeability and flow rate decreases are calculated. The second problem involves field data collected at the Ellidaar geothermal field in Iceland. After 15 years of fluid production, significant declines in pressure and temperature have been observed along with changes in silica concentrations. In order to illustrate the applicability of our model to such data, we have developed a simple numerical model that fits well with the observed production history. The applicability of our coupled method of analyzing the changing reservoir conditions is demonstrated, and the result is a more detailed understanding of the geothermal system. Article in Journal/Newspaper Iceland University of North Texas: UNT Digital Library |
institution |
Open Polar |
collection |
University of North Texas: UNT Digital Library |
op_collection_id |
ftunivnotexas |
language |
English |
topic |
Chalcogenides Separation Processes Silicon Oxides Geothermal Legacy Geothermal Legacy Dissolution Mathematical Models Silicon Compounds Oxides Production Oxide Minerals Fluid Withdrawal 15 Geothermal Energy Geothermal Systems Hydrothermal Systems Energy Systems Silica Oxygen Compounds Minerals Precipitation |
spellingShingle |
Chalcogenides Separation Processes Silicon Oxides Geothermal Legacy Geothermal Legacy Dissolution Mathematical Models Silicon Compounds Oxides Production Oxide Minerals Fluid Withdrawal 15 Geothermal Energy Geothermal Systems Hydrothermal Systems Energy Systems Silica Oxygen Compounds Minerals Precipitation Lai, C.H. Bodvarsson, G.S. Witherspoon, P.A. Numerical studies of silica precipitation/dissolution |
topic_facet |
Chalcogenides Separation Processes Silicon Oxides Geothermal Legacy Geothermal Legacy Dissolution Mathematical Models Silicon Compounds Oxides Production Oxide Minerals Fluid Withdrawal 15 Geothermal Energy Geothermal Systems Hydrothermal Systems Energy Systems Silica Oxygen Compounds Minerals Precipitation |
description |
In this paper we describe our numerical simulator PIC (pressure-temperature-chemistry), and also present the methods we use to reduce error due to numerical diffusion. Examples of the application of this approach to two problems are included. The first problem involves non-isothermal flow of supersaturated silica through single fractures. The precipitation of silica in the fractures is modeled and the resulting permeability and flow rate decreases are calculated. The second problem involves field data collected at the Ellidaar geothermal field in Iceland. After 15 years of fluid production, significant declines in pressure and temperature have been observed along with changes in silica concentrations. In order to illustrate the applicability of our model to such data, we have developed a simple numerical model that fits well with the observed production history. The applicability of our coupled method of analyzing the changing reservoir conditions is demonstrated, and the result is a more detailed understanding of the geothermal system. |
format |
Article in Journal/Newspaper |
author |
Lai, C.H. Bodvarsson, G.S. Witherspoon, P.A. |
author_facet |
Lai, C.H. Bodvarsson, G.S. Witherspoon, P.A. |
author_sort |
Lai, C.H. |
title |
Numerical studies of silica precipitation/dissolution |
title_short |
Numerical studies of silica precipitation/dissolution |
title_full |
Numerical studies of silica precipitation/dissolution |
title_fullStr |
Numerical studies of silica precipitation/dissolution |
title_full_unstemmed |
Numerical studies of silica precipitation/dissolution |
title_sort |
numerical studies of silica precipitation/dissolution |
publisher |
Lawrence Berkeley Laboratory |
publishDate |
1985 |
url |
https://digital.library.unt.edu/ark:/67531/metadc1100932/ |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
10. annual workshop on geothermal reservoir engineering, Stanford, CA, USA, 22 Jan 1985 |
op_relation |
other: DE85008511 rep-no: LBL-18440 rep-no: CONF-850107-4 grantno: AC03-76SF00098 osti: 5986818 https://digital.library.unt.edu/ark:/67531/metadc1100932/ ark: ark:/67531/metadc1100932 |
_version_ |
1766040365253525504 |