[2][3] In 1980, the Indonesian state-owned oil company Pertamina and Exxon formed a joint venture to develop Natuna D-Alpha.
Correspondingly, the field was renamed East Natuna to be geographically more precise.
[7][9] As of 2016, negotiations about the new principal of agreement have not finalized and consequently, a production sharing contract is not signed.
[10] The East Natuna gas field is located in the Greater Sarawak Basin (East Natuna Basin) about 1,100 kilometres (680 mi) north of Jakarta and 225 kilometres (140 mi) northeast of the Natuna Islands covering approximately 310 square kilometres (120 sq mi).
To save costs, the joint development of East Natuna, Tuna block (Premier Oil 65%, Mitsui Oil Exploration 35%), and South Natuna Sea Block B (ConocoPhillips 40%, Inpex 35%, Chevron Corporation 25%) has been proposed.