SINGAPORE/MELBOURNE (Reuters) - Oil prices on Thursday recovered slightly from a 5% slump in the previous session, gaining support from the prospect of tighter short-term supply with two-thirds of U.S. output shut in the Gulf of Mexico as Hurricane Zeta slammed Louisiana.Market watchers said technical support was a factor as well, after signs of a growing global oil supply glut and a second wave of coronavirus infections sent prices tumbling on Wednesday. U.S. West Texas Intermediate (WTI) crude CLc1 futures edged up 7 cents, or 0.19%, to $37.46 a barrel by 0517 GMT, while Brent crude LCOc1 futures were up 4 cents, or 0.10%, at $39.16 a barrel. WTI in the $36.45 to $36.95 range has proven to be a “buy zone” since the beginning of September, Axi chief market strategist Stephen Innes said. If the market fell through that, it would be a bearish sign, he said. Hurricane Zeta’s impact is expected to be short-lived and the return of U.S. production will add to existing oversupply, as Libya rapidly ramps up output after an eight-month blockade.