Oil prices headed for a second year of steep losses in their last trading hours of 2015 as record OPEC supply created an unprecedented global glut that may take another year to clear. U.S. West Texas Intermediate (WTI) crude futures traded 32 cents lower at $36.28 a barrel at 1357 GMT on Thursday and Brent was 19 cents lower at $36.27 a barrel. Brent prices are set for a third year of declines after ending 2013 slighly lower and falling sharply over the past two years.