Oil prices rose on March 4, buoyed by output cuts by producer club OPEC and reports that the United States and China are close to a deal to end a bitter tariff row that has slowed global economic growth.

International Brent futures were at $65.25 a barrel at 0713 GMT, up 18 cents, or 0.3%, from their last close.

U.S. West Texas Intermediate (WTI) crude futures were at $55.94 per barrel, up 14 cents, or 0.3%.

The two countries appear close to a deal that would roll back U.S. tariffs on at least $200 billion worth of Chinese goods, as Beijing makes pledges on structural economic changes and eliminates retaliatory tariffs on U.S. goods, a source briefed on negotiations said on March 3 in Washington, D.C.

Hopes of an end to the trade spat between the two world's biggest economies added support to a market that has been rallying for the past two months on cuts to production.

The "substantive progress" China and the U.S. have made in their trade talks has been "well-received" in both countries and around the world, a senior Chinese official said on March 4.

Supply from the OPEC fell to a four-year low in February, a Reuters survey found, as top exporter Saudi Arabia and its allies over-delivered on the group's supply pact while Venezuelan output registered a further involuntary decline.

"OPEC exports are off by over 1.5 million barrels per day (MMbbl/d) since November," Barclays bank said in a note released on March 3.

"The supply picture looks generally tighter this year," said energy analysts at Fitch Solutions in a note on March 4, adding they expected Brent to average $73 per barrel in 2019.

Oil prices have been further pushed up by U.S. sanctions against OPEC-members Iran and Venezuela, which Barclays bank estimates to have resulted in a reduction of around 2 MMbbl/d in global crude supply.

In the U.S., there are signs that the oil production boom of the past years, which has seen crude output  rise by more than 2 MMbbl/d since early 2018 to more than 12 MMbbl/d, may slow down.

U.S. energy firms last week cut the number of oil rigs looking for new reserves to the lowest in almost nine months as some producers follow through on plans to cut spending despite an over 20% increase in crude futures so far this year.

Despite this, Barclays said "we believe that there could be a repeat performance in the second-half of this year" for U.S. oil output.