Aquifer characterization with tracer test technique; permanent CO₂ sequestration into basalt, SW Iceland

Authors: Rezvani Khalilabad, M.; Axelsson, G.; Gislason, S.R.

Source: Mineralogical Magazine, Volume 72, Number 1, February 2008 , pp. 121-125(5)

Publisher: Mineralogical Society

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Abstract:

Mineral sequestration is among several promising methods of CO₂ reduction. It involves incorporation of CO₂ into a solid phase via precipitation of carbonate minerals. A prerequisite to carbonate precipitation is the availability of aqueous metal cations and a network of porous media for fluid flow and water-rock interactions. The Hellisheidi-Threngsli lava field in SW Iceland comprises ideal conditions for studying the feasibility of permanent CO₂ storage as minerals in basaltic rocks. In this paper we report on a tracer test conducted between two wells at the Hellisheidi-Threngsli site to characterize the physical properties of the main aquifers. The results suggest that most of the water flow between the wells is through an homogenous thick layer with high tortuosity along flow paths and a high reactive surface area for water-rock interactions.

Keywords: TRACER TEST; NA-FLUORESCEIN; MINERAL SEQUESTRATION; BASALTIC AQUIFER; ICELAND

Document Type: Research article

DOI: 10.1180/minmag.2008.072.1.121

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