Phase 1: Identify the reservoir (2007-2010)
The purpose of the Phase 1 pilot project has been to identify a suitable saline aquifer near Longyearbyen where CO2 can be stored. Key activities included the drilling of four wells outside Longyearbyen and regional and local seismic assessments of the reservoir level.
In the autumn of 2007, the first two wells were drilled in the vicinity of Longyearbyen airport. They cored the cap rock and upper reservoir, reaching a depth of 860 meters. A third well was drilled in August-October 2008, a few kilometres into the Adventdalen valley, approx-imately 5 km from Longyearbyen. This well reached 403 meters, coring the cap rocks.
A common challenge for the first three wells was stability. Problems were encountered in a fault zone at 380-480 meters depth, where swelling clays and abundant fractures caused significant problems to well-bore stability.
The fourth well was drilled in the summer of 2009 to approximately 970 meters. This well was completed according to plan, and cored the cap rock and reservoir.  Subsequent well testing using water as injective fluid found good injectivity in otherwise fairly tight sandstones (< 2 mD) of the reservoir, suggesting that flow in the encountered reservoir sandstones was mainly on fractures. Surprisingly, the reservoir is significantly below hydrostatic pressure (ca. 27 bars at 870 m).
Based in the first four wells, seismics and other datasets, the project completed its Phase 1 activity with a summary report by the end of 2010. Web Summary.
 
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Project manager:
Principal Investigator:

Kim Senger

HSE leader:

Fred Skancke Hansen