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- W3113936857 abstract "This project revises the 3D conceptual model for the Hvitholar sub-area in the South Zone of Krafla Geothermal Field. Hvitholar is one of 6 sub-areas in south Krafla, located at the intersection of the south boundary of Krafla caldera, striking E-W, and the NNE-SSW oriented fissure swarms of the North Volcanic Zone. The model developed in this study extends along Vestursvaeði, Þrihvrningar, Hvitholar and Sandabotnaskarð sub-areas with a combined area of around 30 km2. Hvitholar is the only southern sub-area connected to Krafla power station and has exhibited a considerable production decline over the period of 1990 – 2013. According to a lumped simulation, the Hvitholar reservoir follows a two tank open system with a volume of 6.00004 km3. The Hvitholar enthalpy is approximately 1200 kJ/kg; chemically it presents a low concentrationof Cl-, and high CO2. To date, most studies support the hypothesis thatHvitholar characteristics and behaviour are due to the lack of a heat recharge and that the sub-area is in a phase of waning or even becoming extinct. An improved understanding of heat source location and permeability variations will provide the basis of future utilisation decisions. This study presents two alternative conceptual models for Hvitholar in addition the existing one, as a means to test the current conceptual model in order to determine the potential to extend the life of the asset. An update of the geological model was carried out based on data from shallow and deep wells along the southern part of Krafla geothermal field. This update combined with existing data from surface exploration was used to generate three conceptual models in Leapfrog Geothermal. The models focus on the location of heat source, and the permeability variation at the intersection between caldera boundary and fissure swarm. Each of the models are validated with TOUGH2 simulations" @default.
- W3113936857 created "2021-01-05" @default.
- W3113936857 creator A5062239419 @default.
- W3113936857 date "2020-01-01" @default.
- W3113936857 modified "2023-09-23" @default.
- W3113936857 title "3D conceptual model Hvíthólar sub-area, Krafla Geothermal Field Iceland" @default.
- W3113936857 hasPublicationYear "2020" @default.
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