Horizon Oil Ltd. is an oil and petroleum exploration, development and production company. It operates through the following segments: New Zealand Exploration and Development, China Exploration and Development and PNG Exploration and Development. The New Zealand Exploration and Development segment involves in developing and producing crude oil from the Maari/Manaia oil field development, and the exploration and evaluation of hydrocarbons within the permit. The China Exploration and Development segment engages developing and producing crude oil from the block 22/12 - WZ6-12 and WZ12-8W oil field development and in the exploration and evaluation of hydrocarbons within block 22/12. The PNG Exploration and Development segment is currently includes exploration and evaluation of hydrocarbons in six onshore permit areas, PRL 4, PRL 21, PPL 259, PPL 372, PPL 373 and PPL 430. The company was founded in 1969 and is headquartered in Sydney, Australia.