The Development of Ulubelu Geothermal Power Plant 2x55 MW - Lampung Indonesia

Abstract

PT. Pertamina Geothermal Energy has been succeeded to commercially operates new geothermal power plant in Ulubelu, consist of Ulubelu Unit 3&4 with the total capacity of 2x55 MW. The Commercial Operation Date (COD) of Ulubelu Unit 3 is July 26th, 2016 and Unit 4 is March 25th, 2017. Ulubelu Geothermal Area is located in Tanggamus Regency – Lampung province in South Sumatera. The steam field is two-phase flow, water dominated system, with central separator system. These 2 units GPP are supplied by piping system to convey separated steam from separators to the power station and a steam scrubbing system to provide steam at power station interface to the specified quality. Furthermore, a piping system to convey geothermal brine separated from the separators, and condensate, to the far away reinjection well cluster and reinjecting the fluid into designated reinjection wells. Many challenges occur during this project, such as project construction parallel with land acquisition, drilling the wells, unpredicted swampy area in re-injection pipelines area, etc. Despite these limitations, with strong teamwork and strategy, good project management and implementation of Engineering practices, all the problems can be solved and the project is successfully finished ahead the schedule. Many lesson learns can be useful for the next similar project.