Numerical modeling of a potential CO2-supplied enhanced geothermal system (CO2-EGS) in the Asgard field, Norway

• Autorzy: Miecznik Maciej , Tyszer Magdalena , Sowiżdżał Anna , Andresen Trond , Frengstad Bjorn S. , Stenvik Lars A. , Pierzchała Karol , Gładysz Paweł

Identyfikatory

DOI

10.7494/geol.2024.50.2.175

• Języki publikacji: EN

Abstrakty

EN

The principle of Enhanced Geothermal System (EGS) technology is that water injected at a sufficiently high pressure will lead to the fracturing of naturally impermeable rocks, and as a result, this will create hydraulic communication between wells. In this way, reservoirs not previously considered to be perspective can provide geothermal heat to the surface. Since nearly two decades, CO2 is considered, mostly theoretically, as a working fluid that can potentially provide higher net power output than water in EGS’s installation. In this respect, the possibility of accessing high-temperature heat from the Are and Tilje formations located on the shelf of the Norwegian Sea was analysed. The estimated temperature at the reservoir depth of 4,500–5,000 m is not less than 165°C. For this, a 3D numerical modelling was performed in order to analyse 10 different scenarios for heat extraction using supercritical CO2 (sCo2) as a working fluid. Results indicate that appropriate matching of the mass flow and temperature of the injected CO2 allows to avoid premature temperature decline in the reservoir. However, as Are and Tilje formations are built from highly porous and relatively highly permeable rocks, the fluid entering the production well will always be a mixture of CO2 and water. This is advantageous from the point of view that a significant part of the injected CO2 is trapped in the reservoir, while the higher water content in the production well allows a significant temperature drop during fluid extraction to the surface to be avoided.

Słowa kluczowe

EN

Enhanced Geothermal System); EGS; CO2-EGS; CO2 storage; numerical modeling; TOUGH3; Are Formation; Asgard field

• Wydawca: Wydawnictwa AGH
• Czasopismo: Geology, Geophysics and Environment
• Rocznik: 2024
• Tom: Vol. 50, no. 2
• Strony: 175--190
• Opis fizyczny: Bibliogr. 25 poz., rys., tab., wykr.

Twórcy

autor

Miecznik Maciej

• Polish Academy of Sciences, Mineral and Energy Economy Research Institute, Krakow, Poland

autor

Tyszer Magdalena

• Polish Academy of Sciences, Mineral and Energy Economy Research Institute, Krakow, Poland

• https://orcid.org/0000-0002-4456-2828

autor

Sowiżdżał Anna

• AGH University of Krakow, Faculty of Geology, Geophysics and Environmental Protection, Krakow, Poland

• https://orcid.org/0000-0003-1384-3763

autor

Andresen Trond

• SINTEF Energy Research, Department of Gas Technology, Trondheim, Norway

• https://orcid.org/0000-0002-4730-2394

autor

Frengstad Bjorn S.

• NTNU Norwegian University of Science and Technology, Department of Geoscience and Petroleum, Trondheim, Norway

• https://orcid.org/0000-0002-1597-7282

autor

Stenvik Lars A.

• NTNU Norwegian University of Science and Technology, Department of Geoscience and Petroleum, Trondheim, Norway
• Norconsult Norge AS, Sandvika, Norway

• https://orcid.org/0000-0002-0627-8770

autor

Pierzchała Karol

• Polish Academy of Sciences, Mineral and Energy Economy Research Institute, Krakow, Poland

• https://orcid.org/0009-0007-4976-7922

autor

Gładysz Paweł

• AGH University of Krakow, Faculty of Energy and Fuels, Krakow, Poland

• https://orcid.org/0000-0003-0219-6580

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