Oil prices fell on Wednesday after data showed a build in U.S. crude stocks and OPEC reported a rise in its production despite its pledge to cut back on output.
Brent crude futures were at $48.41 per barrel at 0652 GMT, down 31 cents, or 0.6 percent, from their last close.
U.S. West Texas Intermediate (WTI) crude futures were at $46.10 per barrel, down 36 cents, or 0.8 percent.
Crude prices have fallen by more than 10 percent since late May, pulled down by an supply glut that persists despite a move led by the Organization of the Petroleum Exporting Countries (OPEC) to cut production by almost 1.8 million barrels per day (bpd) until the end of the first quarter of 2018.
OPEC’s own compliance with the cuts has been questioned, and the producer group said in a report this week that its output rose by 336,000 bpd in May to 32.14 million bpd.
ANZ bank said in a note to clients that prices were “under pressure earlier in the day after a report from OPEC showed that its production had increased.”
Adding to the supply surplus is rising U.S. production from shale drillers that has pushed U.S. output up by 10 percent over the last year to 9.3 million bpd, not far below levels by top exporter Saudi Arabia.
“The outlook for oil hinges on the effectiveness of the OPEC cuts relative to the supply increases from U.S. shale,” said William O’Loughlin, analyst at Australia’s Rivkin Securities.
Data from the American Petroleum Institute showed on Tuesday that U.S. crude stocks rose by 2.8 million barrels in the week to June 9 to 511.4 million, compared with expectations for a decrease of 2.7 million barrels.
With supplies plentiful, strong demand is needed to support the market, but there are signs of a slowdown.