Exxon Mobil Corp said on Thursday drilling results from a third exploration well offshore Guyana showed a new reservoir containing 100-150 million barrels of oil equivalent. The discovery at the Stabroek block is off a border region that is claimed by Venezuela in a territorial controversy dating back more than a century, even though the area functions in practice as Guyanese territory. The Payara field discovery is about 10 miles (16 km) northwest of Exxon’s 1.4-billion barrel Liza oil discovery. The exploration project is led by Exxon, with Hess Corp and an unit of CNOOC Ltd also holding stakes. (Reporting by Swetha Gopinath in Bengaluru; Editing by Shounak Dasgupta)