US explorer Amerada holds an option to farm into the Lematang production sharing contract if the Singa-1 well is successful. It would also take over operatorship from Australia's Energy Equity to drill two more exploration wells and acquire additional 3D seismic. Novus and Coparex have similar options to take up 15% each of the production sharing contract while Energy Equity will retain a 20% stake, subject to approval from Pertamina, Indonesia's state-run energy company.