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Title: Utilizing supercritical geothermal systems: a review of past ventures and ongoing research activities

Abstract

Here, supercritical geothermal systems are very high-temperature geothermal systems that are located at depths near or below the brittle–ductile transition zone in the crust where the reservoir fluid is assumed to be in the supercritical state, that is for pure water, temperature and pressure are, respectively, in excess of 374 °C and 221 bar. These systems have garnered attention in recent years as a possible type of unconventional geothermal resource due to their very high enthalpy fluids. Supercritical conditions are often found at the roots of volcanic-hosted hydrothermal systems. More than 25 deep wells drilled in geothermal fields such as The Geysers, Salton Sea, and on Hawaii (USA), Kakkonda (Japan), Larderello (Italy), Krafla (Iceland), Los Humeros (Mexico), and Menengai (Kenya) have encountered temperatures in excess of 374 °C, and in some cases have encountered magma. Although fluid entries were documented for some of these wells, it remains an open question if permeability can be maintained at high enthalpy conditions. The IDDP-1 well at Krafla encountered magma, and ended up producing very high enthalpy fluids; however, these fluids were very corrosive and abrasive. Innovative drilling and well completion techniques are therefore needed to deal with the extreme temperatures and aggressive fluid chemistry compositions ofmore » these systems. New efforts are underway in Japan (northern Honshu), Italy (Larderello), Iceland (Reykjanes peninsula and Krafla), Mexico (Los Humeros), USA (Newberry), and New Zealand (Taupo Volcanic Zone) to investigate supercritical systems. Here, we review past studies, describe current research efforts, and outline the challenges and potential opportunities that these systems provide for international collaboration to ultimately utilize supercritical geothermal systems as a geothermal energy resource.« less

Authors:
ORCiD logo; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Geothermal Technologies Office
OSTI Identifier:
1389105
Alternate Identifier(s):
OSTI ID: 1479360
Grant/Contract Number:  
AC02-05CH11231; 608553; 654497
Resource Type:
Published Article
Journal Name:
Geothermal Energy
Additional Journal Information:
Journal Name: Geothermal Energy Journal Volume: 5 Journal Issue: 1; Journal ID: ISSN 2195-9706
Publisher:
Springer Science + Business Media
Country of Publication:
Germany
Language:
English
Subject:
58 GEOSCIENCES; Supercritical geothermal systems; Brittle–ductile transition; International collaboration

Citation Formats

Reinsch, Thomas, Dobson, Patrick, Asanuma, Hiroshi, Huenges, Ernst, Poletto, Flavio, and Sanjuan, Bernard. Utilizing supercritical geothermal systems: a review of past ventures and ongoing research activities. Germany: N. p., 2017. Web. doi:10.1186/s40517-017-0075-y.
Reinsch, Thomas, Dobson, Patrick, Asanuma, Hiroshi, Huenges, Ernst, Poletto, Flavio, & Sanjuan, Bernard. Utilizing supercritical geothermal systems: a review of past ventures and ongoing research activities. Germany. doi:https://doi.org/10.1186/s40517-017-0075-y
Reinsch, Thomas, Dobson, Patrick, Asanuma, Hiroshi, Huenges, Ernst, Poletto, Flavio, and Sanjuan, Bernard. Mon . "Utilizing supercritical geothermal systems: a review of past ventures and ongoing research activities". Germany. doi:https://doi.org/10.1186/s40517-017-0075-y.
@article{osti_1389105,
title = {Utilizing supercritical geothermal systems: a review of past ventures and ongoing research activities},
author = {Reinsch, Thomas and Dobson, Patrick and Asanuma, Hiroshi and Huenges, Ernst and Poletto, Flavio and Sanjuan, Bernard},
abstractNote = {Here, supercritical geothermal systems are very high-temperature geothermal systems that are located at depths near or below the brittle–ductile transition zone in the crust where the reservoir fluid is assumed to be in the supercritical state, that is for pure water, temperature and pressure are, respectively, in excess of 374 °C and 221 bar. These systems have garnered attention in recent years as a possible type of unconventional geothermal resource due to their very high enthalpy fluids. Supercritical conditions are often found at the roots of volcanic-hosted hydrothermal systems. More than 25 deep wells drilled in geothermal fields such as The Geysers, Salton Sea, and on Hawaii (USA), Kakkonda (Japan), Larderello (Italy), Krafla (Iceland), Los Humeros (Mexico), and Menengai (Kenya) have encountered temperatures in excess of 374 °C, and in some cases have encountered magma. Although fluid entries were documented for some of these wells, it remains an open question if permeability can be maintained at high enthalpy conditions. The IDDP-1 well at Krafla encountered magma, and ended up producing very high enthalpy fluids; however, these fluids were very corrosive and abrasive. Innovative drilling and well completion techniques are therefore needed to deal with the extreme temperatures and aggressive fluid chemistry compositions of these systems. New efforts are underway in Japan (northern Honshu), Italy (Larderello), Iceland (Reykjanes peninsula and Krafla), Mexico (Los Humeros), USA (Newberry), and New Zealand (Taupo Volcanic Zone) to investigate supercritical systems. Here, we review past studies, describe current research efforts, and outline the challenges and potential opportunities that these systems provide for international collaboration to ultimately utilize supercritical geothermal systems as a geothermal energy resource.},
doi = {10.1186/s40517-017-0075-y},
journal = {Geothermal Energy},
number = 1,
volume = 5,
place = {Germany},
year = {2017},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: https://doi.org/10.1186/s40517-017-0075-y

Citation Metrics:
Cited by: 9 works
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