By Laura Sanicola (Reuters) -Oil prices rose on Monday, shaking off weaker demand expectations as supply concerns mount heading into the winter. Brent crude futures rose $1.51, or 1.6%, to $94.35 a barrel by 12:42 p.m. EDT (1642 GMT). U.S. West Texas Intermediate crude was up $1.28, or 1.5%, at $88.07. U.S. emergency oil stocks fell 8.4 million barrels to 434.1 million barrels in the week ended Sept. 9, its lowest since October 1984, according to data released Monday by the U.S. Department of Energy (DOE). U.S. President Joe Biden in March set a plan to release 1 million barrels per day over s…