Deep geothermal energy extraction, a review on environmental hotspots with focus on geo-technical site conditions

Gkousis, Spiros; Welkenhuysen, Kris; Compernolle, Tine

doi:10.1016/j.rser.2022.112430

Cited by 18 publications

(4 citation statements)

References 57 publications

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“…On the other hand, extraction of subsurface geothermal resources might be accompanied by CO 2 and CH 4 direct emissions, emissions of metals, etc. The authors of [44] reviewed 30 studies on geothermal plants and revealed the influence of the geotechnical parameters of various drilling sites on the environment. The authors considered the following geological conditions: temperature of fluids, reservoir depth, and rock properties.…”

Section: Why a Site For The Production Well Should Be Thoroughly Sele...mentioning

confidence: 99%

Identification of Inhomogeneities: The Selected Coordinate Descent Method Applied in the Drilling Area

Smaglichenko,

Smaglichenko

2023

Mathematics

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The exploration of inhomogeneities is a crucial factor for industries because of the necessary control of the quality of output products or the check adequacy of the data from the helping information systems. In the energy-conception field, the preliminary study of borehole areas has special importance because it can avoid risks of secure drilling and financial expenses. In this paper, an innovative option of the traditional coordinate descent method called selected coordinate descent, was investigated by collating its fundamentals with other methods used in various industrial branches. A practical application of selected coordinate descent was performed for experimental data of seismic event registration observed in the region of geothermal plants. An explicit formula for the resolution parameter was utilized to distinguish well and poorly resolved anomalies. The inhomogeneities were validated on the basis of a good resolution and comparison with data from other disciplines. The main result of our study is the performance of the algebraic technique application in the reconstruction of large-size structures. The identification of the found seismic inhomogeneities permits us to indicate the sites that are questionable for drilling and to obtain knowledge about the rock types at crucial depths.

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Section: Why a Site For The Production Well Should Be Thoroughly Sele...mentioning

confidence: 99%

Identification of Inhomogeneities: The Selected Coordinate Descent Method Applied in the Drilling Area

Smaglichenko,

Smaglichenko

2023

Mathematics

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“…The SimaPro 9.00.49® software (Pre Consultants, 2011) is used. The widely used, on geothermal LCAs (Gkousis et al, 2022), CML developed impact assessment method (van Oers, 2015) is used for the GW, OD, AD and EP categories. For the POC and AC impacts the ILCD+2011 method (JRC, 2011) is used to calculate the results in the units suggested by the GEOENVI guidelines (Parisi et al, 2020).…”

Section: Scope Definitionmentioning

confidence: 99%

“…Ten parameters, presented in Table 5, are varied in the GSA. They are selected based on the results of the LCA and the results presented in previous studies (Gkousis et al, 2022). The GSA is not performed for the AD and CEDren impacts because they are dominated by the building construction and the geofluid use respectively.…”

Section: Global Sensitivity Analysismentioning

confidence: 99%

Life cycle assessment of geothermal plants targeting the lower carboniferous limestone reservoir in northern Belgium

Gkousis

Harcouët-Menou

Damen

et al. 2022

Journal of Cleaner Production

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“…Geothermal energy, however, entails a critical concern in regard to the environmental impact, among others, associated with the construction, operation and end-of-life (EOL) [12,13] of a power plant. There are critical concerns with the high amount of noncondensable gases included in the geothermal fluid composition, which will later represent an environmental impact due to the emissions released to the atmosphere during GPP operation, apart from the problems that are created in the operation (corrosion, calcite deposition, etc.)…”

Section: Introductionmentioning

confidence: 99%

Environmental Impact Assessment of Nesjavellir Geothermal Power Plant for Heat and Electricity Production

Mainar-Toledo,

Díaz-Ramírez,

Egilsson

et al. 2023

Sustainability

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This work is focused on presenting the main results and discussions concerning the environmental benefits of reducing the non-condensable gases emitted from the Nesjavellir geothermal power plant. The primary objective of this study is to conduct a life cycle evaluation to analyse the overall environmental benefit effects of producing 1 kWh of electricity and 1 kWh of thermal energy in the geothermal power plant at Nesjavellir, which is located in Iceland. The assessment is performed both before and after implementing an abatement system designed to reduce CO2 and H2S gases. The production of geothermal energy is increasing every year and, therefore, it is crucial to identify and quantify the key environmental factors of producing this type of energy and improvements for the future energy transition of the energy generation sector. Firstly, the results show that the environmental impact of electricity production is higher compared to heat production. More in detail, the emissions due to the nature of the geothermal fluid and the construction phase represent the most relevant environmental load for both electricity and heat production for nearly all the 18 environmental impact indicators studied. Furthermore, considering the abatement system for the non-condensable gas emissions, reductions of 78% and 60% in global warming potential is achieved for a production of 1 kWh of electricity and 1 kWh of thermal energy. In terms of external environmental costs, the implementation of an abatement system results in a reduction exceeding 95% for both electricity and thermal energy production per kilowatt-hour. The outcomes obtained from both the baseline scenario and the application of the abatement system undeniably prove that the latter results in a substantial decrease in the overall environmental impacts linked to the generation of 1 kWh of electricity and 1 kWh of heat, encompassing a notable reduction in external environmental costs (externalities).

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Deep geothermal energy extraction, a review on environmental hotspots with focus on geo-technical site conditions

Cited by 18 publications

References 57 publications

Identification of Inhomogeneities: The Selected Coordinate Descent Method Applied in the Drilling Area

Identification of Inhomogeneities: The Selected Coordinate Descent Method Applied in the Drilling Area

Life cycle assessment of geothermal plants targeting the lower carboniferous limestone reservoir in northern Belgium

Environmental Impact Assessment of Nesjavellir Geothermal Power Plant for Heat and Electricity Production

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