Oil futures declined on Friday with expectations for a supply surplus next year, strength in the U.S. dollar, and continued worries over demand from China — the world’s largest crude importer — setting prices up to post a loss for the week.

Oil prices fell on Friday on signs demand in China, the world's biggest crude importer, continues to underperform amid its uneven economic recovery. Brent crude futures were down 65 cents, or 0.9%, at $71.

U.S. crude oil is down more than 2% this week, while Brent has shed nearly 2%. Here are Friday's energy prices: West Texas Intermediate December contract: $68.56 per barrel, down