The Norwegian Petroleum Directorate (NPD) has given ExxonMobil Corp. (NYSE: XOM) permission to continue using subsea facilities on the Sigyn Field in the North Sea from the end of 2017 until the end of 2022, NPD said in a news release.

The subsea facilities include wells and a subsea template, a pipeline to Sleipner A, and an umbilical for controlling and monitoring of wells.

NPD said ExxonMobil, which holds a 40% interest in the field with partner Statoil holding the rest, indicated in its application that current estimates show production until year-end 2022.

A new development well drilled in 2016 contributed to the field’s extended lifetime. The field encompasses the deposits Sigyn Vest, which contains gas and condensate, and Sigyn Øst, which contains light oil, NPD said in the release. Production started in 2002.