- Business
- Horizon Oil Limited is an upstream oil and gas company engaged in the exploration, appraisal, development, and production of hydrocarbon assets primarily in the Asia-Pacific region. The company’s core products and services include conventional oil and gas production from joint venture interests in Australia, New Zealand, China, and Thailand. Key assets include non-operated interests in Block 22/12 in the Beibu Gulf, China; the Maari oil project in New Zealand; the Mereenie oil and gas field in the Northern Territory, Australia; and producing assets in Thailand including Sinphuhorm and Nam Phong. The company focuses on low-cost, conventional oil production while also expanding its gas production capabilities to create a balanced portfolio of oil and gas resources.
Founded in 1987 and headquartered in Sydney, Australia, Horizon Oil has recently undertaken significant strategic initiatives including the acquisition of a 25% non-operated interest in the OL4 and OL5 development licenses containing the Mereenie oil and gas field, completed in mid-2024. This acquisition has diversified the company's production base, materially increased reserves, and extended production outlook beyond existing license expirations. Horizon Oil also secured a 10-year extension of the Mari permit in New Zealand until 2037, supporting ongoing production enhancement and deferral of decommissioning. Additional recent operational advances include a successful four-well drilling program in Block 22/12, China, and infill drilling in Mereenie that boosted production rates.
In 2025, the company expanded its footprint into Thailand through the acquisition of ExxonMobil's Thai subsidiary assets, increasing group production by approximately 50% and 2P reserves by about 40%. Horizon Oil has also entered into strategic long-term gas sales agreements with the Northern Territory Government and extended existing gas supply contracts, ensuring stable gas revenue streams through the end of the decade. These developments support Horizon’s strategic focus on organic growth, asset diversification across multiple jurisdictions, and a balanced oil and gas production portfolio designed to generate resilient cash flows and shareholder value.
Horizon Oil operates through several distinct business segments: New Zealand exploration and development, China exploration and development, and other international assets, with activity spanning Southeast Asia and Australia. The company maintains an active, high-caliber management team emphasizing disciplined portfolio management, operational optimization, and strategic acquisitions. Horizon Oil’s recent transition to include gas production alongside its traditional oil production is aimed at aligning with evolving energy markets and ensuring sustainable long-term growth.
Overall, Horizon Oil Limited presents a diversified upstream oil and gas profile with key producing assets across the Asia-Pacific, strengthened by recent strategic acquisitions, license extensions, production enhancements, and long-term sales contracts. The company is well positioned as a low-cost producer with a balanced portfolio and a trajectory for continued production sustainability and expansion through the 2020s.