The benchmark for global oil market, Brent futures LCOc1 gained 56 cents, or 1.1 percent to $51.02 a barrel by 01:56 GMT. U.S. West Texas Intermediate crude CLc1 rose 48 cents, or 1 percent, to $48.14 a barrel, as reported by Reuters.
On Tuesday, WTI slid 2.4 percent to its lowest close since March 21 and Brent closed at its lowest level this year, erasing all of the gains made since OPEC agreed to reduce production in November.
"There is precautionary buying following API data and leading to EIA data tonight," said Ric Spooner, chief market analyst at CMC Markets in Sydney.
"The lower oil gets, there is potential for forming a base. We are near lows made in March both in Brent and West Texas and if we do see, as many expect, a good run of draw in inventories into the summer, I think there is some upside potential."
U.S. crude stocks fell last week, and both gasoline and distillate inventories also dropped, data from industry group the American Petroleum Institute (API) showed on Tuesday.
Crude inventories fell by 4.2 million barrels in the week ended April 28 to 528.3 million barrels, compared with analyst expectations for a decrease of 2.3 million barrels. Crude stocks at the Cushing, Oklahoma, delivery hub fell by 215,000 barrels, API said.
The U.S. government will release its Energy Information Administration (EIA) inventory data on Wednesday at 14:30 GMT.
"The supply of crude oil continues to decline. This is evident in both spot and forward supply data," commodities brokerage Marex Spectron said in a note.
"Demand remains strong and in spite of lower refinery profitability we see increasing capacity utilization rates."
Read alsoRussia to discuss extending oil cut with OPEC May 24Production from the Organization of the Petroleum Exporting Countries (OPEC) fell for a fourth straight month in April, a Reuters survey found on Tuesday, as top exporter Saudi Arabia kept production below its target while maintenance and unrest cut production in exempt nations Nigeria and Libya.
But more oil from Angola and higher UAE output than originally thought meant OPEC compliance with its production-cutting deal slipped to 90 percent from a revised 92 percent in March, according to Reuters surveys.
Crude oil discharged on ships worldwide in April was near a record high of 45 million barrels per day, according to Thomson Reuters Eikon data.
This indicates supplies remain high, but it also implies strong demand, especially from Asia.
While OPEC countries are cutting production, exports of U.S crude oil to Asia have spiked.
