Saudi Arabia's state budget deficit shrank by a fifth from a year earlier in the second quarter of this year as revenues rose moderately and spending fell marginally, finance ministry figures showed on Sunday.

Non-oil growth is projected to pick up to 1.7 percent in 2017, but overall real GDP growth is expected to be close to zero as oil GDP declines in line with Saudi Arabia’s commitments under the OPEC+ agreement.

“Saudi Aramco plans to invest more than $300 billion over the coming decade to reinforce our preeminent position in oil, maintain our spare oil production capacity and pursue a large exploration and production program centered on conventional and unconventional gas resources.”

Saudi Arabia will cut crude oil shipments to its customers in August by more than 600,000 barrels per day to balance the rise in domestic consumption during the summer, while staying within its OPEC production commitment, a Saudi industry source said.

Saudi Arabia effectively grew its recoverable oil resources by 73 billion barrels this year after lower tax rates for state producer Saudi Aramco boosted the country's estimated prospective resources.

"When these factors are taken together I can only conclude that the supplies coming from marginal barrels including shale production will not be sufficient to meet the future need for incremental capacity the mid-term," Falih said. "The market balance is already pointing in that direction," he added.

Net foreign assets at the central bank shrank by $8.5 billion from the previous month to $492.9 billion in April, reaching their lowest level since 2011, central bank figures showed on Sunday. They fell 13.9 percent from a year earlier.

No one envies the Saudi Arabians now. Yes, the Brent price has rebounded from its of 2015-16 lows to stabilise over $50. At the Opec meeting in Vienna this week the delegates agreed to extend production curbs for another nine months.

Ministers from the Organization of Petroleum Exporting Countries and its allies meet in Vienna to decide whether to prolong their agreement. Major producers including Saudi Arabia, Russia and Iraq favor an extension for nine months and, while other options will be discussed, consensus is building around an agreement that runs through next March.

Saudi Aramco today signed agreements with major U.S. companies which will pave way for the company to enhance its business synergy with the U.S. as well as attracting investments from its U.S. counterparts to the Kingdom.