Oil prices climbed on Monday, supported by Saudi optimism about Asian demand and an Iraqi pledge to deepen supply cuts. "Comments from the weekend from Aramco are the driver at the moment," said Michael McCarthy, market strategist at CMC Markets and Stockbroking. "Saudi Arabia and Iraq forging better relationships over the oil deal are excellent for the compliance outlook," AxiCorp market strategist Stephen Innes said in a note.

The world’s largest oil company, Saudi Aramco, still intends to raise its production capacity to 13 million barrels a day. 

U.S. crude oil producers indicated that active oil drilling rigs had fallen to its lowest since 2005, a development that Saxo Bank analyst Ole Hansen said cast further doubt on any significant short-term rebound in U.S. production.

Source: Tradingview.com

Attached graph compared Brent oil (candle chart) and WTI crude oil (orange line) from the begging of the day. As we can in the picture, Brent oil increased by 1,19% and WTI crude oil increased by approximately. 1,62% in 15:30.