Publication Date:
2013-03-22
Description:
The Fizzy discovery, a southern North Sea (UK) gas accumulation with ~50% natural CO 2 content, provides an opportunity to study the long-term quantity of CO 2 -related mineral reaction as an analogue for engineered CO 2 storage. The reservoir contains diagenetic dolomite typical of the formation; to identify and quantify any sequestration-related dolomite is challenging. To this end, CO 2 was extracted by stepwise extraction from dolomite from both the Fizzy discovery and equivalent sandstones from a low-CO 2 location. Between 0% and 22% of the dolomite in the Fizzy discovery precipitated due to the high CO 2 concentration. This corresponds to 11% ± 8% of the recent high-CO 2 charge sequestered as dolomite, a relatively low proportion after ~50 m.y. of potential CO 2 -water-rock interaction.
Print ISSN:
0091-7613
Electronic ISSN:
1943-2682
Topics:
Geosciences
