Aker BP's major projects off Norway to cost more, fiscal budget shows ↧ ↧ Aker BP's major projects off Norway to cost more, fiscal budget shows The cost of Aker BP's ​major ongoing oil and gas development projects, Yggdrasil and ‌Valhall-Fenris, has risen by 9.8% and 23%, respectively, from nominal estimates a year ago, data from the government's fiscal budget showed on ​Wednesday.