A pump jack operates at a well site leased by Devon Energy Production Co. near Guthrie, Oklahoma.

Oil prices fell on Friday on concerns over rising U.S. supplies and as traders begin to pull out crude barrels from pricey storage.

Book squaring ahead of the weekend and ahead of upcoming Feb. 28 expirations in for April delivery, heating oil for March delivery, and March RBOB gasoline, also pressured prices, analysts and traders said.