Greymouth Petroleum is a privately owned New Zealand energy company focused on the exploration, development and production of natural gas and oil, primarily in the Taranaki region. Established in the early 2000s, the company operates a portfolio of onshore energy assets, including the Turangi, Kowhai, Kaimiro, Ngatoro and Moturoa fields, and is one of New Zealand's significant domestic gas producers. Its operations play an important role in supplying gas to industrial customers and supporting the country's energy security.