“The U.S. oil rig count, a key indicator for trader sentiment, exhibited a rather large weekly decline,” said analysts at consultants JBC Energy GmbH in Vienna. “At least in the short term, this dynamic should help protect the downside to crude prices. The more pressing question may be how much higher prices can climb before the gravitational forces of global supply and demand can start to form an upper limit.” West Texas Intermediate for October delivery rose as much as 44 cents, or 0.9 percent, to $50.33 a barrel on the New York Mercantile Exchange, and traded for $49.91 at 10:43 a.m. London time. On Sept. 14, it reached $50.50, the highest since May 25. Total volume traded was about 26 percent below the 100-day average. Click Read More below for additional detail.

Futures in New York were little changed, putting them on course for a 2.8 percent drop in February. An industry report was said to show U.S. oil inventories rose last week, which would be the fourth expansion in five weeks if confirmed in government data. The head of OPEC plans to dine with shale producers in Houston next week at a time when America is pumping at record levels and threatening the group’s efforts to curb a global glut. U.S. crude output is forecast to rise to a record level in February, stoking fears that shale producers may derail OPEC’s strategy of reducing output to clear a global glut. The producer group’s Secretary General Mohammad Barkindo said he will meet with U.S. shale company executives for dinner on Monday in Houston, the second time he has met with some of the cartel’s top rivals.