Vår Energi plans to invest around $15 billion in a score of new tieback projects offshore Norway, aiming to keep its oil and gas production at over 350,000 barrels per oil equivalent per day beyond 2030, CEO Nick Walker said on Thursday. Vår Energi, the top independent oil and gas producer offshore Norway, said it sanctioned 10 development projects this year, as part of its early-phase portfolio of around 30 projects to be delivered by the end of the decade. These projects are adding high-value barrels to sustain production…