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POLARPROG-Polarforskningsprogram

Svalbard Sand Volcano (SvSV)

Tildelt: kr 53 999

The UNIS CO2 Lab (http://co2-ccs.unis.no/) operates the Longyearbyen CO2 Lab (LYB CO2 Lab) in Svalbard. As part of this carbon capture and storage (CCS) pilot programme, several boreholes were drilled in Adventdalen to assess the targeted reservoir and caprock (Braathen et al., 2012; Olaussen et al., 2019). The same geological intervals outcrop at Deltaneset and Diabasodden, some 15 km to the north which have been the focus of several (on-going) studies (e.g. RIS 6661, 11145, 11333). Recent research here has been heavily focused on structural geology, particularly faulting and fracturing of the reservoir (Ogata et al., 2014; Mulrooney et al., 2019) and caprock (e.g. RIS 11145, 11333). However, the presence of sand injectites and an associated sand volcano in the caprock of the Agardhfjellet Formation at between Deltaneset and Diabasodden has been known for several decades (Wierzbowski and Ziembinska-Tworzydlo, 1984) but work on them is at an early stage. Sand injectites have also been discovered in the same time-equivilent intervals in the Barents Sea where they also pose a risk to CO2 storage and hydrocarbon retention. The SvSV project aims to supplement current geological knowledge of the area and stratigraphy by investigating the extent of the sand volcano complex and associated injectites. Most importantly, limited knowledge exists on the lateral and vertical extent of the injectites, and it is imperative to understand whether the permeable injectite complex forms a direct migration pathway through the cap rock interval, resulting in the potential leakage of injected CO2 into the atmosphere or shallower intervals.

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POLARPROG-Polarforskningsprogram