Oil prices rose on Tuesday after a severe disruption to Libyan oil supplies and on comments from officials suggesting OPEC could extend its production cuts deal to the end of the year.
Production at the western Libyan fields of Sharara and Wafa has been blocked by armed factions, reducing output by 252,000 barrels per day (bpd), about a third of production, said a source at the National Oil Corporation (NOC).
NOC has declared force majeure on crude loadings from the Sharara oilfield.
Prices for front-month Brent crude futures, the international market benchmark, rose 57 cents, or 1.1 percent, to $51.32 per barrel by 2:36 p.m. ET (1836 GMT). It touched a session high of $51.87.
West Texas Intermediate (WTI)futures, the U.S. benchmark, settled 64 cents, or 1.4 percent, higher at $48.37 a barrel. The contract earlier rose to $48.74.