By Devika Krishna Kumar
NEW YORK (Reuters) - Oil prices were largely unchanged on Friday in a volatile session, as traders reacted to comments from Fed Chair Janet Yellen and reports of missile activity in Saudi Arabia.
The market was taking its cues from the movement in the dollar, which has been choppy following Yellen's remarks.
At one point, crude benchmarks were up as much as 2 percent before drifting lower. Brent crude futures settled at $49.92, up 25 cents or 0.5 percent. U.S. crude ended the session 31 cents higher at $47.64.
- PHOTOS: Massachusetts residents make first retail marijuana purchases 12 Pictures
- Prepare for GoT season 8 with this Game of Thrones whisky 8 Pictures
Prices gathered support briefly from Baker Hughes data showing that U.S. oil drillers kept rig count steady after eight weeks of additions.
The market was primed to react to Yellen's speech in Jackson Hole, Wyoming, as her remarks initially caused a big rally in the dollar, which caused oil to slip. Later, the dollar pared those gains, with the dollar index at one point down as much as 0.5 percent. It was later up 0.8 percent.
Oil prices touched the day's highs after reports of Yemeni missiles hitting Saudi Arabia's facilities, traders said. Saudi state TV reported that a projectile fired from Yemen hit a power relay facility in Najran, in the southern part of Saudi Arabia.
Sal Umek, senior analyst at the Energy Management Institute in New York, said he did not see much effect on the market from the Saudi Arabia reports.
"At the end of the day, what is driving the market right now is short covering, being that it's Friday and the dollar," he said.
A weaker dollar can be seen as supportive for oil prices as it makes dollar-traded oil cheaper for countries using other currencies, potentially spurring demand.
Oil and natural gas traders have also been watching for the impact of tropical storms, saying some could possibly become a major hurricane in the Gulf of Mexico, taking out further supply.
BP said it began securing offshore facilities and evacuating non-essential personnel from our platforms and drilling rigs in the U.S. Gulf.
Oil prices were down over 2 percent for the week as the Saudi energy minister watered down expectations that the world's largest producers might agree next month to limit their output.
"We don't believe any significant intervention in the market is necessary other than to allow the forces of supply and demand to do the work for us," Saudi Energy Minister Khalid Al-Falih told Reuters late on Thursday.
Members of the Organization of the Petroleum Exporting Countries will meet on the sidelines of the International Energy Forum, which groups producers and consumers, in Algeria from Sept. 26-28.
(Additional reporting by Amanda Cooper in London, Henning Gloystein and Sarah Plattes in Singapore; editing by Tom Brown)