Oil prices settled up 2 percent on Wednesday despite a rise in U.S. crude inventories, with the market heading for its largest third-quarter gain in 13 years after the Iraqi oil minister said OPEC and its partners were considering extending or deepening output cuts.

Brent crude futures rose $1.06, or 1.9 percent, to $56.20 a barrel, while U.S. West Texas Intermediate (WTI) crude futures gained 93 cents, or 1.9 percent, to $50.41.

Crude prices were on course for a nearly 16 percent rise this quarter, which would make this year's performance the strongest for the third quarter since 2004.

U.S. crude oil stockpiles jumped last week as imports and production increased, the U.S. Energy Information Administration said, as operations resumed from the impact of Hurricane Harvey

On Friday the Organisation of the Petroleum Exporting Countries and other producers will meet in Vienna to discuss the progress of their deal to limit output.

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The group is considering a range of options, including an extension of cuts, but it would be premature to decide on what to do beyond the agreement's expiry in March, Iraqi oil minister Jabar al-Luaibi told an energy conference on Tuesday.

OPEC and non-OPEC producers including Russia have agreed to reduce output by about 1.8 million barrels per day (bpd) until March to reduce global oil inventories and support prices.

Some producers think the pact should be extended for three or four months, others want it to run until the end of 2018, while some, including Ecuador and Iraq, think there should be another round of supply cuts, al-Luaibi said.