PTT Exploration and Production Public Company Limited (PTTEP) is a national petroleum exploration and production company based in Thailand. It is a subsidiary of the state-owned PTT Public Company Limited. The company was founded on 20 June 1985.
PTTEP’s core business is exploration and production of petroleum in Thailand and foreign countries. As of June 30, 2018, PTTEP Group had 40 petroleum exploration and production projects in 11 countries; 16 projects in Thailand, 15 projects in Southeast Asia, 5 projects in Americas, 3 projects in Africa and 1 project in Australia.
Source: https://en.wikipedia.org/wiki/PTT_Exploration_and_Production
