Cash spending from the fund, the world's largest of its kind with assets of more than $1 trillion, is now seen at 238.1 billion Norwegian crowns ($27.26 billion) this year, more than the 231.1 billion originally planned last October.
The revised fiscal spending plan will have a positive impact on the economy, boosting growth by some 0.5 percentage point, according to the Finance Ministry's calculation, while the initial plan had been for a neutral impact of 0.0 point.
The increase in the so-called budget impulse is mostly due to a downward revision of 2018 spending however, and taken together the budgets for 2018 and 2019 will have a largely neutral impact, the government said.
Lifted by a weak currency and strong demand from a boom in offshore oil and gas investments, the country's mainland economy is expected to grow by 2.7% this year, up from 2.2% last year, and in line with a forecast first made last October.
In 2020, the mainland economy is now expected to grow by 2.5 percent, less than the 2.8% seen in October.