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UPDATE 6-Oil dips, weekly drop exceeds 2 pct as glut worry lingers

* Oil set for weekly losses of 2-3 pct

* Market shifts into backwardation, suggesting tightness (New throughout, updates prices, market activity and comments; new byline, changes dateline, previously AMSTERDAM)

NEW YORK, Aug 18 (Reuters) - Oil prices edged lower on Friday, and were on track to close the week down 2 to 3 percent as investors continued to worry about the global crude glut.

The week's trading was defined by bearish data about Chinese oil demand and rising crude production in the United States.

Benchmark Brent crude futures were down 5 cents at $50.98 by 11:01 a.m. EDT (1401 GMT). U.S. West Texas Intermediate (WTI) crude futures were down 14 cents at $46.95 a barrel.

"The main question is whether we will continue to see the kind of inventory draws that may show the supply-demand balance is tightening over the next few weeks," said Gene McGillian, director of market research at Tradition Energy.

Prices for future months of Brent are now lower than the front-month contract, meaning the Brent forward curve has moved from contango into backwardation. A backwardated market is considered a bullish sign for prices since it indicates demand is outpacing supply.

Signs of supply tightness have started appearing in the United States, the world's biggest oil consumer.

Despite a 13 percent jump in production <C-OUT-T-EIA> since mid-2016 to 9.5 million bpd, the country's commercial crude inventories <C-STK-T-EIA> have fallen 13 percent from their March records to below 2016 levels.

(Additional reporting by Henning Gloystein and Karolin Schaps; Editing by David Evans and David Gregorio)