Source
http://thebarentsobserver.com/industry-and-energy/2016/09/statoil-mulls-eu65-billion-investment-arctic-field,
https://www.arcticnow.com/business/energy/2017/12/05/statoil-announces-massive-investment-in-its-northernmost-oil-field/, https://www.equinor.com/en/what-we-do/new-field-developments/johan-castberg.html