Tethys Petroleum Limited engages in the acquisition, exploration, and development of crude oil and natural gas fields in Kazakhstan. It also produces and sells crude oil and natural gas. The company was formerly known as Tethys Petroleum Investments Limited and changed its name to Tethys Petroleum Limited in September 2006. Tethys Petroleum Limited was incorporated in 2003 and is based in Grand Cayman, the Cayman Islands.