Horizon Oil Ltd. is an oil and petroleum exploration, development and production company. It operates through the following segments: New Zealand Development, New Zealand Exploration, China Exploration and Development and PNG Exploration and Development. The New Zealand Development segment produces crude oil from the Maari/Manaia fields, which are located in offshore New Zealand. The New Zealand Exploration segment is involved in the exploration and evaluation of hydrocarbons in two offshore permit areas, including PEP 51313, and PMP 38160 Maari/Manaia. The China Exploration and Development segment engages in 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 involved in the 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 Woolloomooloo, Australia.