MELBOURNE: Oil prices rose in early trade on Wednesday, adding to overnight gains, after industry data showed U.S. oil inventories declined more than expected and OPEC raised its outlook for oil demand.

Brent crude futures rose 28 cents, or 0.4%, to $63.95 a barrel at 0057 GMT, after climbing 39 cents on Tuesday.

U.S. West Texas Intermediate (WTI) crude futures similarly climbed 28 cents, or 0.5%, to $60.46 a barrel, adding to Tuesday's rise of 48 cents.

Oil price gains over the past week have been underpinned by signs of a strong economic recovery in China and the United States, but have been capped by concerns over stalled vaccine rollouts worldwide and soaring COVID-19 infections in India and Brazil.

Nevertheless, the Organization of the Petroleum Exporting Countries (OPEC) tweaked up its forecast on Tuesday for world oil demand growth this year, now expecting demand to rise by 5.95 million barrels per day (bpd) in 2021, up by 70,000 bpd from its forecast last month. It is banking on the pandemic to subside and travel curbs to be eased. 

"It was a welcome prognosis by the market, which had been fretting about the impact the ongoing pandemic was having on demand," ANZ Research analysts said in a note.

Further supporting the market on Wednesday, sources said data from the American Petroleum Institute showed crude stocks fell by 3.6 million barrels in the week ended April 9, compared with estimates for a decline of about 2.9 million barrels from analysts polled by Reuters. 

Traders are waiting to see if official inventory data from the U.S. Energy Information Administration (EIA) on Wednesday matches that view.

Market gains are being capped on concerns about increased oil production in the United States and rising supply from Iran at a time when OPEC and its allies, together called OPEC+, are set to bring on more supply from May.

"They may have to contend with rising U.S. supply," ANZ analysts said.

EIA said this week oil output from seven major shale formations is expected to rise by 13,000 bpd in May to 7.61 million bpd. 

(Reporting by Sonali Paul; Editing by Muralikumar Anantharaman) ((Sonali.Paul@thomsonreuters.com; +61 407 119 523))