Sarulla Geothermal


As Indonesia is positioning the geothermal energy as its strategic power source, the country holds the world’s largest amount of potential geothermal resources around 40%. The enhancement of geothermal power projects is one of the strategic and environmental friendly energy sources, which also becomes the priority of the Government of Indonesia in securing alternative energy sources. This is in line with the Government’s policies in energy diversification, fuel oil (Bahan Bakar Minyak = BBM) consumption reduction and anticipating the rise in electricity demands in Indonesia, especially in North Sumatera. 

Sarulla Geothermal Project is part of the Indonesian Government’s electricity development program (the Fast Track Program II). Therefore,  Aanticipating the electricity demands in North Sumatera, Sarulla Operations Ltd (“SOL”) will build the largest single-contract geothermal power plants in the world with the capacity of 3 x 110 MW (“Project”).  The location of Tthe Project is located in Pahae Julu and Pahae Jae Districts, North Tapanuli Regency, North Sumatera Province ande. The the commercial operation of the first unit was operated on 18 March 2017 which will be followed by the other two units in November 2017 and Mayrch 2018 respectively.  

The Project will be fueled by steam and brine from two production and injection facilities at Silangkitang (“SIL”) and Namora-I-Langit (“NIL”) reservoirs. The power plants will utilize Geothermal Combined Cycle Units (“GCCU”) which are more efficient than conventional flash type geothermal power plants. The plants will capture the steam and brine from the wells and produce energy throughout the day and is intended for base load operation. The condensate steam and the brine water will be re-injected to underground via wells to maintain sustainable geothermal resources. The Project  will also include sapproximately 20 km transmission line from the power plants to the 150/275 KV substation still under construction by PLN.

As of July 2017, SOL has completed 151 production wells with estimated total capacity 374 MW.  Another 21 development wells are is now being drilled. SOL has also completed 190 injection wells. with 7 more are being drilled right now.

In 2015, SOL received awards for project finance arrangements from several magazines, namely Asia Pacific Power Deal of the Year 2014 from Project Finance International (PFI), Deals of the Year 2014 from Trade Finance Magazine, Asia Pacific Power 2014 from IJGlobal Asia Pacific, Best Project Financing 2014 from Global Capital Asia, and Best Project Financing in Asia 2014/2015 from Finance Asia.