Pre-Feasibility Study

PT Supreme Energy has completed the pre-feasibility study of the Rantau Dedap geothermal prospect in March 2009 as assigned by the Minister of Energy and Mineral Resources.
The study successfully estimated the possible reserves based on the conceptual model constructed by the integration of geological, geophysical, geochemical data and prior wells.
Geotechnical data was added in order to identify any constraints or hazards for development of the field. The earth science data acquired during the pre-feasibility studies were used to estimate resource size of the prospects.


Project Updates

The concession for the Rantau Dedap has been awarded to Supreme Energy in early December 2010 and the Mining Area License was granted to the project company PT Supreme Energy Rantau Dedap (SERD). SERD has received the assignment from the Minister of Energy and Mineral Resources through assignment letter No. 5834/26/MEM.L/2011 September 30, 2011.

The exploration program has started since 2011. It has completed the Airborne topographic survey and  civil engineering study. Heat loss survey, report and the geoscientific interpretation as well have been completed by the end of February 2012.

On November 12, 2012 Rantau Dedap project has entered the Power Purchase Agreement (PPA) signing with Indonesian state-owned electricity utility Perusahaan Listrik Negara (PLN). The signing was done by President & CEO of SERD, Supramu Santosa and President Director of PT PLN, Nur Pamudji, witnessed by Minister of Energy and Mineral Resources. Signing of PPA marks a key milestone as it defines the contractual rights and obligations of the parties during the exploration phase, construction phase and operation phase – conditions which are necessary to start exploration drilling activities.

By the end of 2013, about 14 km of road has already been opened. Land acquisition has reached 100%  of the overall land required for the project. Civil construction work has already finished its original scope at the end of July 2014. SERD completed the construction of road access and well pad in November 2014 with a total of 4 well pad B, C, E, I and ± 42 km road accesses from Kota Agung – Tunggul Bute – Rantau Dedap.

The First Spud-in of exploration well RD-B1 was conducted on February 3rd 2014. In November 2014, SERD and the Asian Development Bank (ADB) confirmed that SERD fulfilled all conditions precedent and reached financial closing to get USD 50 million facility agreement, provided by The Asian Development Bank (ADB) supported by the Clean Technology Fund, for the exploration program of Rantau Dedap geothermal project.

The exploration drilling continued until early 2015 and completed 6 wells which are RD-B2, RD-C1, RD-C2, RD-I1 and RD-I2. The short-term well test for RD-B1, RD-B2, RD-C1, RD-C2, RD-I1 and RD-I2 were completed in 2015 to maximize the potential of geothermal resources. In 2016, SERD will complete the feasibility study report, FEED and EPC tender.