(Reuters) -Oil prices rose slightly on Friday after four straight sessions of declines but were on track for their steepest weekly decline since late June due to market expectations that the OPEC+ group could hike output further despite oversupply concerns. Brent crude futures gained 18 cents, or 0.3%, to $64.29 a barrel by 0000 GMT. U.S. West Texas Intermediate crude climbed by 19 cents, or 0.3%, to $60.67 a barrel. If prices do not further recover in this session, Brent could close at the lowest level since the week ended May 30, while WTI would finish at a level not seen since May 2. On a weekly basis, Brent has plunged 8.3%, while WTI is 7.6% lower. OPEC+ could agree to raise oil production by up to 500,000 barrels per day in November, triple the increase for October, as Saudi Arabia s

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