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dc.contributor.author
Barcelona, Hernan
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dc.contributor.author
Senger, Martin
dc.contributor.author
Yagupsky, Daniel Leonardo
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dc.date.available
2021-07-12T12:12:33Z
dc.date.issued
2021-02
dc.identifier.citation
Barcelona, Hernan; Senger, Martin; Yagupsky, Daniel Leonardo; Resource assessment of the Copahue geothermal field; Pergamon-Elsevier Science Ltd; Geothermics; 90; 2-2021; 1-16
dc.identifier.issn
0375-6505
dc.identifier.uri
http://hdl.handle.net/11336/135824
dc.description.abstract
This paper assesses the electrical generating capacity of the Copahue geothermal field. Because it plays a critical role in driving financial support, we discuss these results in terms of its geothermal project. We performed a set of estimates, including the volumetric method and wellhead output calculations. The former was supported by a 3D-geological model that allowed us to subdivide the reservoir into blocks to constraint the parameters to each zone better. The probability models estimate that the proved resource can produce more than 10.2 MWe and 13.5 MWe at 90 % and 50 % confidence level, respectively. The wellhead power output calculations were supported by long- and short- period discharge test performed at three production wells and one slim hole and by the analysis of its decline paths. We estimate 10 MWe in the most optimistic prediction ruling out the identified power plant decline, above 5 % per year. Regardless of the method, our results support less than half of the previously calculated proven power output (i.e., 30 MWe) used to scale the offered tenders to develop a power plant. Overestimation cases worldwide invite us to be even more restricted over our power capacity estimations. Moreover, a tighter characterization of the reservoir volume (e.g., Chilean ranking) could redefine it from proven to probable, increasing the uncertainty over the resource. Throughout its 50 years of history the Copahue Geothermal Project reached significant milestones (first power plant on South America, a district –heating system, and four drilled wells). However, an in-depth review of the project history revealed several setbacks (closure of the power generation and direct use projects because of technical issues, developer retreatments, inadequate tenders) that partially explain its current on-hold status. We concluded that more work is needed before advancing towards the development stage of the project. The vast heat storage at Copahue is beyond doubt, but it is mandatory to improve the estimations of the steam supply, enhance the success rate of wells by a new drilling exploration stage, resize the projected power plant and perform a more accurate feasibility report. New attempts to attract investors and future developers should consider these goals and the project history to avoid new setbacks.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Pergamon-Elsevier Science Ltd
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
COPAHUE GEOTHERMAL PROJECT
dc.subject
MONTECARLO SIMULATION
dc.subject
VOLUMETRIC METHOD
dc.subject
WELLHEAD POWER OUTPUT
dc.subject.classification
Ingeniería del Petróleo, Energía y Combustibles
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dc.subject.classification
Ingeniería del Medio Ambiente
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.subject.classification
Otras Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Resource assessment of the Copahue geothermal field
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-06-28T19:02:25Z
dc.journal.volume
90
dc.journal.pagination
1-16
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Barcelona, Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
dc.description.fil
Fil: Senger, Martin. Universidad de Ginebra; Suiza
dc.description.fil
Fil: Yagupsky, Daniel Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina
dc.journal.title
Geothermics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.geothermics.2020.101987
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