Crude oil prices gained over 1 percent this week, driven by a larger-than-expected draw in U.S. crude inventories and optimism about Chinese economic growth. Both benchmarks, Brent Crude and West Texas Intermediate, advanced approximately 1.4 percent for the week. Yesterday, Brent Crude traded at 74 dollars and 17 cents per barrel, gaining 1.24 percent. WTI Crude also advanced nearly 1.5 percent to trade at around 70 dollars and 60 cents per barrel.