"I think with increasing demand eventually shale oil will all be catered for," Al-Sada told reporters.

Al-Sada said demand is healthy, with expected growth in line with last year's rise of around 1.2 million barrels per day (bpd).

OPEC and non-OPEC producers have agreed to lower output by almost 1.8 million bpd in hopes of reducing oversupply and supporting prices.

However, higher prices could encourage U.S. shale operators to increase drilling.

(Reporting by Rania El Gamal; editing by Jason Neely)