The month of August has been a cornerstone for the development of the Dvalin project where Edison Norge has a stake of 10%, Petoro 35% and Wintershall Dea is the operator 55%.
The 2019 subsea installation season was successfully concluded after an intense summer of activity around Dvalin gas field. Dvalin is being developed as a subsea field tied back to Heidrun, which lies around 15 kilometers to the northwest.
Four development wells on the Dvalin field (located 259 kilometers north of Kristiansund in mid Norway) have begun to be drilled to a depth of around 4,500 meters, in the Norwegian Sea. First gas is planned in 2020. Drilling of the development wells from the Transocean Arctic rig is expected to last approximately one year.
Since April there has been high activity with installation of pipe-lines and the manifold at 400 meters water depth. Then a 3,500 tonne processing module was completed and lifted safely on to the nearby Heidrun platform in preparation for receiving gas from Dvalin. The three-hour operation ranks among the heaviest lifts onto an existing platform in the history of the Norwegian Continental Shelf.
The Dvalin gas field in the Norwegian Sea is being developed with four subsea wells, tied back to the Equinor operated Heidrun host platform. The gas from Dvalin will be transported to the Heidrun platform via a 15-kilometre pipeline. From there, it will be sent to the Polarled gas transportation system via a 7.5-kilometre pipeline, before it will be further processed to dry gas at the Nyhamna onshore gas terminal. Finally, the gas will be transported via Gassled to the market.
Partnership: Wintershall Dea (operator 55%), Petoro (35%), Edison Norge (10%)
Location: 259 kilometres north of Kristiansund on the West coast of Norway, 15 kilometres northwest of the Heidrun field and 35 kilometres south of the Skarv field in the Norwegian Sea.
Water depth: 400 meters
Estimated reserves: 18,2 bn Sm3
Development solution: A four-slot template has been installed on the seabed. Flow-lines and umbilical will be connected to the Heidrun platform, 15 kilometres northwest of the Dvalin field. On the Heidrun platform, two modules, one 400 tonne utility module and one 3,500 tonne gas processing and compression module, have been installed.