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.

Brent futures were up 4 cents at $46.95 at 0214 GMT. On Monday, they fell 46 cents, or 1 percent, to settle at $46.91 a barrel. That was their lowest since Nov. 29, the day before the Organization of the Petroleum Exporting Countries (OPEC) and other producers agreed to cut output for six months from January. U.S. West Texas Intermediate crude futures were down 1 cent at $44.19 a barrel. They declined 54 cents, or 1.2 percent in the previous session, to settle at $44.20 per barrel, the lowest close since Nov. 14. The July contract will expire on Tuesday and August will become the front-month.

"In my opinion, market fundamentals are going in the right direction, but in light of the large surplus in stockpiles over the past years, the cut needs time to take effect," he told the newspaper, referring to a global deal to curb oil production.

Brent crude oil LCOc1 was up 48 cents at $48.34 a barrel by 12:17 p.m. EDT. U.S. crude CLc1 was 39 cents higher at $46.04 a barrel. U.S. crude and Brent benchmarks remained on track for weekly declines of more than 3 percent, pressured by big U.S. inventories and heavy worldwide flows.

Brent crude LCOc1 was up 43 cents by 0900 GMT at $48.49 a barrel, having fallen 4 percent the day before, while U.S. crude futures CLc1 rose 38 cents to $46.10 a barrel.

U.S. crude production will average more than 10 million barrels a day for the first time in 2018, breaking a record almost five decades old and keeping prices from rising as much as previously estimated, government forecasts showed Tuesday.

OPEC’s crude oil production increased by 270,000 bpd in May over April, to stand at 32.12mn bpd – the highest level since January this year

The Organization of the Petroleum Exporting Countries (OPEC) met on May 25, 2017, and announced an extension to production cuts that were originally set to end this month. The agreed-upon OPEC crude oil production target remains at 32.5 million barrels per day (b/d) through the end of the first quarter of 2018. EIA now forecasts OPEC members’ crude oil production to average 32.3 million b/d in 2017 and 32.8 million b/d in 2018, about 0.2 million b/d and 0.4 million b/d, respectively, lower than previously forecast. However, continuing production growth in many non-OPEC countries is expected to moderate the pace of global liquid fuels inventory draws in 2017 and lead to a small inventory build in 2018.

Brent crude prices LCOc1 were at $49.70 per barrel at 1351 GMT, down 42 cents. Brent is about 8 percent below its open on May 25, when OPEC and other producers agreed to extend oil output cuts through to the first quarter of 2018. U.S. light crude prices CLc1 were at $47.69 per barrel, down 50 cents.

The US Energy Information Administration lowered its crude-oil price forecast and raised its US production outlook for 2018. The lower price forecast reflects the possibility of a return to modest oversupply in global oil markets in 2018.

Global benchmark Brent LCOc1 advanced 1.1 percent to $50.48 a barrel. U.S. oil CLc1 also climbed 1 percent to $48.17.

A crude price in the $50s is the new reality for bosses of some of the world’s largest producers as output caps from OPEC and its allies are balanced out by rising U.S. shale.

Benchmark Brent crude futures LCOc1 were off by nearly 3 percent at $49.14 per barrel at 1034 GMT (6:34 a.m. ET), down $1.49 from the previous close. U.S. West Texas Intermediate crude CLc1 futures fell $1.45 cents to $46.91 per barrel.

US crude oil inventories fell for an eighth straight week and drawdowns appear to be expanding.

"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.