Brent crude LCOc1 ended a run of four days of consecutive gains to trade 36 cents lower at $53.51 per barrel at 0831 GMT. U.S. light crude CLc1 was down 33 cents at $50.80.

Brent crude gained 48 cents o $54.09 a barrel by 1043 GMT (6:43 a.m. ET), with U.S. light crude up 47 cents at $50.80.

U.S. Rig Count is up 497 rigs from last year's count of 404, with oil rigs up 402, gas rigs up 95, and miscellaneous rigs unchanged. Canadian Rig Count is up 41 rigs from last year's count of 44, with oil rigs up 20, gas rigs up 22, and miscellaneous rigs down 1 to 0.

Brent crude LCOc1 was up 28 cents, or 0.5 percent, at $52.79 at 0630 GMT. The contract earlier rose to the highest since April 21 and is on track for a nearly 4 percent climb this week, its second week of gains. U.S. crude oil CLc1 was up 29 cents, or 0.6 percent, at $49.64 a barrel, highest since April 26. The contract is also heading for a weekly increase of almost 4 percent.

Total petroleum deliveries in April moved up by 1.7 percent from April 2016 to average 19.6 million barrels per day. These were the highest April deliveries in nine years, since 2008. Compared with March, total domestic petroleum deliveries, a measure of U.S. petroleum demand, decreased 0.3 percent. For year to date, total domestic petroleum deliveries moved up slightly by 0.1 percent compared to the same period last year to average 19.4 million barrels per day.

China's attempt to test marine natural gas hydrates, a future energy source, has turned out to be a success, making it the first country to secure continuous and stable gas supply in marine gas hydrate exploitation, according to the Ministry of Land and Resources.

Preliminary production figures for April 2017 show an average daily production of 2 111 000 barrels of oil, NGL and condensate, which is an decrease of 38 000 barrels per day (approx. 2 percent) compared to March.

Brent crude was up 50 cents at $52.15 per barrel by 1330 GMT. U.S. light crude rose 39 cents to $49.05.

Brent crude was down 20 cents, or 0.4 percent, from the last close at $51.45 per barrel at 0647 GMT. U.S. West Texas Intermediate (WTI) crude was at $48.39, down 27 cents, or 0.6 percent.

Brent crude oil was up 30 cents at $52.12 a barrel by 0750 GMT. U.S. light crude was 25 cents higher at $49.10 a barrel. Both benchmarks have risen more than $5 a barrel since hitting five-month lows 10 days ago.