Pumps will suck in 14,000 cubic metres of untreated seawater each day, and inject this into the reservoir. The pumps drive the water into the ground between Tyrihans North and South. When this is combined with gas injection optimal pressure support is obtained in the reservoir.

The well stream from the subsea templates will be transferred to the Kristin platform through a 43-kilometre pipeline. The long distance makes great demands on the pipeline quality and design. Tyrihans has the world's longest pipeline with direct electrical heating.

The technology developed in connection with Tyrihans sets a new standard for subsea field development. Stringent environmental and maintenance-related requirements must be met by the equipment. The structures are designed to last without maintenance throughout the 25-year production period. Tyrihans is scheduled to come on stream in 2009.