Horizon Oil Ltd is engaged in exploration, development, production and sale of crude oil. The company operates in three segments: China development, New Zealand development and Australia development. It generates key revenue from China development segment which is involved in developing and producing crude oil from the Block 22/12-WZ6-12, WZ12-8W and WZ12-8E oil field developments and in the exploration and evaluation of hydrocarbons within Block 22/12.