Modelling reinjection of two-phase non-condensable gases and water in geothermal wells

Leontidis, V.; Niknam, Pouriya H.; Durgut, İsmai̇l; Talluri, Lorenzo; Manfrida, Giampaolo; Fiaschi, Daniele; Akın, Serhat; Gainville, Martin

doi:10.1016/j.applthermaleng.2023.120018

Cited by 17 publications

(6 citation statements)

References 34 publications

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“…To ensure the inclusion of suitable high-pressure gas resources in the current field development project, this document defines the necessary criteria. These resources must be treatable to meet the specified GPP conditions and align with the calculated inlet pressure values A. Deryaev (Leontidis et al, 2023). To ensure export-quality gas is delivered even with the anticipated decrease in high-pressure gas supplies, the gas compressor station needs to maintain operation in gas treatment modes.…”

Section: Resultsmentioning

confidence: 99%

Integration of advanced technologies to improve the efficiency of gas condensate field development

Deryaev

2024

Tehnìka ta energetika

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In the context of constantly growing global energy demand and rapid changes in the energy sector, the study and implementation of advanced technologies in the development of gas condensate fields is of critical importance. The purpose of this study is to investigate methods to increase the efficiency of production and sustainable use of energy resources by optimising the development of gas condensate fields using advanced technologies. The methods used include analytical method, classification, functional method, statistical method, synthesis. Within the framework of this study, the technological aspects of using wells of the Altyguyi gas condensate field were investigated and extensive laboratory and field analyses were conducted aimed at the correct implementation of the double injection method for simultaneous extraction of gas from one reservoir and oil from another, with an emphasis on their contribution to the development of wells through this approach. The paper also considers aspects of operation and technology, including hydrodynamic and thermohydrodynamic studies, when analysing well designs considering compatibility intervals and mining and geological drilling conditions, based on predictive curves of reservoir pressure and rock fracture pressure. As a result of the analyses, studies and calculations, the implementation of the method of intensification of gas condensate field production using the oil and gas approach of dual injection in one well was substantiated. This approach is focused on reducing capital investments and accelerating the development process. The practical significance of this research lies in the development and implementation of innovative technologies to optimise the production processes of gas condensate fields, which contributes to improving the efficiency of hydrocarbon production and promotes the sustainable use of energy resources

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Section: Resultsmentioning

confidence: 99%

Integration of advanced technologies to improve the efficiency of gas condensate field development

Deryaev

2024

Tehnìka ta energetika

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“…Qualtra is an innovative proposal for a modern geothermal power plant (GPP), applying for the first time a closed-loop operation [1], that is, avoiding emissions into the atmosphere. The technology applied relies on a binary cycle approach.…”

Section: Description Of the Qualtra Geothermal Projectmentioning

confidence: 99%

“…The high-pressure NCG stream (mainly CO2) is directed to the innovative re-injection well. This operates following a new concept: two-phase flow re-injection (the liquid brine + the compressed NCG stream) is realized by mixing the streams at substantial depths using a coaxial pipe arrangement and one or more reverse-gas lift valves, which allow the gas (which passes across the external annulus) into the inner pipe, delivering the brine [1]. The mixing conditions at depth take place at high pressure, and accurate two-phase flow models were realized in WP2 and 4 of the GECO Project to demonstrate that the two-phase flow regime would be stable (including transients of operation, such as well startup or closure) and ensure that the NCG stream is proceeding downwards into the reservoir.…”

Section: Description Of the Qualtra Geothermal Projectmentioning

confidence: 99%

Qualtra Geothermal Power Plant: Life Cycle, Exergo-Economic, and Exergo-Environmental Preliminary Assessment

Zuffi,

Ungar,

Fiaschi

et al. 2024

Sustainability

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Qualtra, an innovative 10 MW geothermal power plant proposal, employs a closed-loop design to mitigate emissions, ensuring no direct release into the atmosphere. A thorough assessment utilizing energy and exergy analysis, life cycle assessment (LCA), exergo-economic analysis, and exergo environmental analysis (EevA) was conducted. The LCA results, utilizing the ReCiPe 2016 midpoint methodology, encompass all the spectrum of environmental indicators provided. The technology implemented makes it possible to avoid direct atmospheric emissions from the Qualtra plant, so the environmental impact is mainly due to indirect emissions over the life cycle. The result obtained for the global warming potential indicator is about 6.6 g CO2 eq/kWh, notably lower compared to other conventional systems. Contribution analysis reveals that the construction phase dominates, accounting for over 90% of the impact for almost all LCA midpoint categories, excluding stratospheric ozone depletion, which is dominated by the impact from the operation and maintenance phase, at about 87%. Endpoint indicators were assessed to estimate the single score value using normalization and weighting at the component level. The resulting single score is then used in an Exergo-Environmental Analysis (EEvA), highlighting the well system as the most impactful contributor, constituting approximately 45% of the total impact. Other substantial contributions to the environmental impact include the condenser (21%), the turbine (17%), and the HEGeo (14%). The exergo-economic analysis assesses cost distribution across major plant components, projecting an electricity cost of about 9.4 c€/kWh.

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“…QUALTRA is an innovative proposal of modern Geothermal Power Plant (GPP), applying for the first time closed-loop operation [1,2], that is, avoiding emissions to atmosphere. The technology applied relies on a binary cycle approach.…”

Section: Description Of the Qualtra Geothermal Projectmentioning

confidence: 99%

Qualtra Geothermal Power Plant: Life Cycle, Exergo-Economic and Exergo-Environmental Preliminary Assessment

Zuffi,

Ungar,

Fiaschi

et al. 2024

Preprint

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Qualtra, an innovative 10 MW geothermal power plant proposal, employs a closed-loop design to mitigate emissions, ensuring no direct release into the atmosphere. A thorough assessment utilizing energy and exergy analysis, Life Cycle Assessment (LCA), Exergo-economic and Exergo Environmental Analysis (EevA) was conducted. The LCA results, utilizing the ReCiPe 2016 midpoint methodology, encompass all the spectrum of environmental indicators provided. The technology implemented makes it possible to totally avoid direct atmospheric emissions from the Qualtra plant, so the environmental impact is mainly due to indirect emissions over the life cycle. The results obtained for the Global Warming Potential indicator is about 6.6 g CO2/kWh, notably lower compared to other conventional systems. Contribution analysis reveals that the construction phase dominates, accounting for over 90% of the impact in all LCA MidPoint categories. At the component level, a single score calculation incorporating normalization and weighting was executed. The resulting single score is then used into Exergo-Environmental Analysis (EEvA), highlighting the well system as the most impactful contributor, constituting approximately 45% of the total impact. Other substantial contributions to the environmental impact include the condenser (21%), the turbine (17%), and the HEGeo (14%). The Exergo-Economic analysis assesses cost distribution across major plant components, projecting an electricity cost of about 8.3 c€/kWh.

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Modelling reinjection of two-phase non-condensable gases and water in geothermal wells

Cited by 17 publications

References 34 publications

Integration of advanced technologies to improve the efficiency of gas condensate field development

Integration of advanced technologies to improve the efficiency of gas condensate field development

Qualtra Geothermal Power Plant: Life Cycle, Exergo-Economic, and Exergo-Environmental Preliminary Assessment

Qualtra Geothermal Power Plant: Life Cycle, Exergo-Economic and Exergo-Environmental Preliminary Assessment

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