Estimates of geothermal reservoir fluid characteristics: GeoSys.Chem and WATCH
A comparative study of the reservoir fluid characteristics calculation of ten production wells of Los Azufres, Los Humeros and Cerro Prieto geothermal fields using two computer codes GeoChem (GeoSys.Chem) and WATCH is presented. GeoSys.Chem estimates the reservoir temperature and vapor fraction through quartz geothermometry and assuming enthalpy conservation, while the average temperature of quartz and Na/K geothermometers is employed in WATCH and vapor fraction is also calculated through enthalpy conservation. Both programs use the conservation of alkalinity (i.e., proton balance) for pH calculations. The difference in temperature (pressure) causes considerable effects on the calculated geothermal reservoirfluid characteristics of high enthalpy wells and negative (or near to zero) vapor fraction for low enthalpy wells. The calculated high concentration of CO2 in the secondary vapor discharged in the atmosphere at the weir box (up to 11,719 mmole/kg) suggests that the analysis of carbonic species in the geothermal waters is crucial. In the absence ofgood quality analysis of carbonic species it is suggested to consider the CO2 in the vapor sample at the separator and the total dissolved carbonic species concentration in the water sample (i.e., without considering the liberation of CO2 in the atmospheric vapor at the weir box) for the calculation of geothermal reservoir fluid composition.
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Universidad Nacional Autónoma de México, Instituto de Geología
2012
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oai:scielo:S1026-877420120003000142013-05-23Estimates of geothermal reservoir fluid characteristics: GeoSys.Chem and WATCHTorres-Alvarado,Ignacio SalvadorVerma,Mahendra P.Opondo,KizitoNieva,DavidHaklidir,Füsun TutSantoyo,EdgarBarragán,Rosa MaríaArellano,Víctor GeoSys.Chem GeoChem WATCH geochemical modeling geothermal system A comparative study of the reservoir fluid characteristics calculation of ten production wells of Los Azufres, Los Humeros and Cerro Prieto geothermal fields using two computer codes GeoChem (GeoSys.Chem) and WATCH is presented. GeoSys.Chem estimates the reservoir temperature and vapor fraction through quartz geothermometry and assuming enthalpy conservation, while the average temperature of quartz and Na/K geothermometers is employed in WATCH and vapor fraction is also calculated through enthalpy conservation. Both programs use the conservation of alkalinity (i.e., proton balance) for pH calculations. The difference in temperature (pressure) causes considerable effects on the calculated geothermal reservoirfluid characteristics of high enthalpy wells and negative (or near to zero) vapor fraction for low enthalpy wells. The calculated high concentration of CO2 in the secondary vapor discharged in the atmosphere at the weir box (up to 11,719 mmole/kg) suggests that the analysis of carbonic species in the geothermal waters is crucial. In the absence ofgood quality analysis of carbonic species it is suggested to consider the CO2 in the vapor sample at the separator and the total dissolved carbonic species concentration in the water sample (i.e., without considering the liberation of CO2 in the atmospheric vapor at the weir box) for the calculation of geothermal reservoir fluid composition.info:eu-repo/semantics/openAccessUniversidad Nacional Autónoma de México, Instituto de GeologíaRevista mexicana de ciencias geológicas v.29 n.3 20122012-12-01info:eu-repo/semantics/articletext/htmlhttp://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1026-87742012000300014en |
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Torres-Alvarado,Ignacio Salvador Verma,Mahendra P. Opondo,Kizito Nieva,David Haklidir,Füsun Tut Santoyo,Edgar Barragán,Rosa María Arellano,Víctor |
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Torres-Alvarado,Ignacio Salvador Verma,Mahendra P. Opondo,Kizito Nieva,David Haklidir,Füsun Tut Santoyo,Edgar Barragán,Rosa María Arellano,Víctor Estimates of geothermal reservoir fluid characteristics: GeoSys.Chem and WATCH |
author_facet |
Torres-Alvarado,Ignacio Salvador Verma,Mahendra P. Opondo,Kizito Nieva,David Haklidir,Füsun Tut Santoyo,Edgar Barragán,Rosa María Arellano,Víctor |
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Torres-Alvarado,Ignacio Salvador |
title |
Estimates of geothermal reservoir fluid characteristics: GeoSys.Chem and WATCH |
title_short |
Estimates of geothermal reservoir fluid characteristics: GeoSys.Chem and WATCH |
title_full |
Estimates of geothermal reservoir fluid characteristics: GeoSys.Chem and WATCH |
title_fullStr |
Estimates of geothermal reservoir fluid characteristics: GeoSys.Chem and WATCH |
title_full_unstemmed |
Estimates of geothermal reservoir fluid characteristics: GeoSys.Chem and WATCH |
title_sort |
estimates of geothermal reservoir fluid characteristics: geosys.chem and watch |
description |
A comparative study of the reservoir fluid characteristics calculation of ten production wells of Los Azufres, Los Humeros and Cerro Prieto geothermal fields using two computer codes GeoChem (GeoSys.Chem) and WATCH is presented. GeoSys.Chem estimates the reservoir temperature and vapor fraction through quartz geothermometry and assuming enthalpy conservation, while the average temperature of quartz and Na/K geothermometers is employed in WATCH and vapor fraction is also calculated through enthalpy conservation. Both programs use the conservation of alkalinity (i.e., proton balance) for pH calculations. The difference in temperature (pressure) causes considerable effects on the calculated geothermal reservoirfluid characteristics of high enthalpy wells and negative (or near to zero) vapor fraction for low enthalpy wells. The calculated high concentration of CO2 in the secondary vapor discharged in the atmosphere at the weir box (up to 11,719 mmole/kg) suggests that the analysis of carbonic species in the geothermal waters is crucial. In the absence ofgood quality analysis of carbonic species it is suggested to consider the CO2 in the vapor sample at the separator and the total dissolved carbonic species concentration in the water sample (i.e., without considering the liberation of CO2 in the atmospheric vapor at the weir box) for the calculation of geothermal reservoir fluid composition. |
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Universidad Nacional Autónoma de México, Instituto de Geología |
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2012 |
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http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1026-87742012000300014 |
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