Heru Berian Pratama

Reservoir Modeling and Simulation
Geothermal Reservoir Sustainability
Reservoir Performance Forecast
Estimation of Reserve and Electrical Potential
Geothermal Production
Reservoir Management
Geothermal Well Testing and Analysis

January 2017 – Present
Teaching Staff
Lecturer at Bachelor of Petroleum Engineering and Master’s degree in Geothermal Engineering

Reservoir Engineering, Faculty of Mining and Petroleum Engineering (FTTM) – ITB Course:
Geothermal Engineering, Geothermal Field Development, Geothermal Reservoir Engineering, Evaluation of Geothermal Prospect, Geothermal Reservoir Management, Geothermal Reservoir Simulation, Research Methodology, Thesis Proposal, Thesis

June – December 2025
Pre-feasibility Study of Non-Condensable Gas Reinjection to Geothermal Reservoir – Pertamina, LAPI ITB
Role: Geothermal Expert and Team Leader in Geothermal Reservoir Modeling and Simulation

April – November 2025
Feasibility Study of Re-Purposing Abandoned / To-be Abandoned Oil & Gas Wells for Geothermal Exploration in MPA, OIL’s Operational Area, Upper Assam Basin
Client: Halliburton, PT LAPI ITB
Role: Geothermal Expert and Team Leader in Geothermal Reservoir Modeling, Simulation, Surface Facilities, and Power Plant

August 2020
Teknik Geothermal – Limited Edition (Book) – Nenny M. Saptadji
Role: Editor-in-Chief

December 2019
Consultancy Services for Pre-Feasibility Study of Ungaran Geothermal Working Area (GWA)
Consortium: KSO PT Kwarsa Hexagon – Newjec Inc. – PT Geo Ace
Role: Reservoir Engineer

December 2019
Consultancy Services for Pre-Feasibility Study of Kepahiang Geothermal Working Area (GWA)
Consortium: KSO PT Kwarsa Hexagon – Newjec Inc. – PT Geo Ace
Role: Reservoir Engineer

August 2018
Teknik Geothermal (Book) – Nenny M. Saptadji
Role: Editor-in-Chief

June – November 2016
Consultancy Services for Feasibility Study of Ulumbu and Mataloko Geothermal Power Plant Project (Financed by PLN Budget)
Consortium: KSO PT Kwarsa Hexagon – ELC
Role: Reservoir Engineer

August – December 2016
Asset Auction for Chevron Geothermal – PT Pertamina Geothermal Energy (PGE)
Client: PT PGE – LAPI ITB
Role: Reviewer Team Member for Geothermal Resources (Reservoir and Production), Reservoir Engineer

June – December 2015
User Guide for Reservoir and Production – PT Pertamina
Client: PT Pertamina – ITB
Role: Compiler Team Member for Geothermal Sector

September 2015
Tender Document for Gunung Lawu Geothermal Field
Client: PT Pertamina UBD
Role: Compiler Team Member, Reservoir and Production Sector

Heru Berian Pratama, Pratama, A.B., Kubo, T., Koike, K. (2025). Clarification of the Formation Process of a High-Temperature, Liquid-Dominated Reservoir in a Post-caldera Setting by Simulation of the Karurusu Geothermal Field, Northern Japan. Natural Resources Research. https://doi.org/10.1007/s11053-025-10559-x

Heru Berian Pratama, Koike, K., Pratama, A.B., Kusumasari, B.A., Ashat, A., Sutopo, Soelaiman, T.A.F. (2025). Numerical simulation–based optimization of an integrated framework for the efficient development and sustainable utilization of geothermal resources: Application to the Bedugul geothermal field. Geothermics, 127, 103208. https://doi.org/10.1016/j.geothermics.2024.103208

Heru Berian Pratama, Koike, K. (2024). Thermodynamic model-based specification of optimal geothermal power generation system for high-temperature liquid-dominated systems using flash and flash-binary cycles. Renewable Energy, 220, 119634. https://doi.org/10.1016/j.renene.2023.119634

Heru Berian Pratama, Koike, K., Ashat, A., Keintjem, R.J. (2024). Power potential estimation and reservoir parameter assessment using a hybrid response surface methodology and numerical reservoir simulation approach: Application to the Bedugul geothermal field, Bali, Indonesia. Geothermics, 121, 103020. https://doi.org/10.1016/j.geothermics.2024.103020

Heru Berian Pratama, Koike, K., Pratama, A.B., Ashat, A. (2024). Model of a post-caldera volcano-hosted and vapor-dominated system through a numerical simulation study of the Bedugul geothermal field, Bali Island, Indonesia. Geothermics, 116, 102848. https://doi.org/10.1016/j.geothermics.2023.102848

15th ITB International Geothermal Workshop, Bandung, Indonesia. 2025
Conference of The Geothermal Research Society of Japan 2024
13rd ITB International Geothermal Workshop, Bandung, Indonesia. 2024
Conference of The Geothermal Research Society of Japan 2023
12nd ITB International Geothermal Workshop, Bandung, Indonesia. 2023
The Mining and Materials Processing Institute of Japan (MMIJ) Annual Meeting 2022, March 7th – 9th
10th ITB International Geothermal Workshop, Bandung, Indonesia. 2021
8th Indonesia International Geothermal Convention & Exhibition, Jakarta, Indonesia. 2020
9th ITB International Geothermal Workshop, Bandung, Indonesia. 2020
7th Indonesia International Geothermal Convention & Exhibition, Jakarta, Indonesia. 2019
8th ITB International Geothermal Workshop, Bandung, Indonesia. 2019
6th Indonesia International Geothermal Convention & Exhibition, Jakarta, Indonesia. 2018
7th ITB International Geothermal Workshop, Bandung, Indonesia. 2018
5th Indonesia International Geothermal Convention & Exhibition, Jakarta, Indonesia. 2017
6th ITB International Geothermal Workshop, Bandung, Indonesia. 2017
4th Indonesia International Geothermal Convention & Exhibition, Jakarta, Indonesia. 2016
5th ITB International Geothermal Workshop, Bandung, Indonesia. 2016
3rd Indonesia International Geothermal Convention & Exhibition, Jakarta, Indonesia. 2015
5th ITB International Geothermal Workshop, Bandung, Indonesia. 2015
37th New Zealand Geothermal Workshop, Wairakei Resort Taupo, New Zealand. 2015

Trainer, Legal Process in Geothermal Project
For SRE – April 2022

Trainer, Linux and Fortran Programming for Data Processing in Geothermal Exploration/Exploitation
8–10 February 2021

Trainer, Geothermal Project Management (Batch I–IV)
PT Geo Dipa Energi – 2018–2020

Trainer, Geothermal Reservoir Modeling
Institut Teknologi Bandung (ITB), Bandung – 17–21 December 2018

Trainer, Geothermal Production Engineering
2018

Trainer, Macro Excel for Geothermal Application
2018

Trainer, Basic Operation & Maintenance (O&M) Training for Power Plant
PT Supreme Energy, ITB Bandung – 2018

Trainer, Subsurface Geothermal Engineering
ITB Bandung – 2–5 May 2017

Trainer, Pre-Workshop Course 3 – Engineering and Exploitation of Geothermal Energy
6th Indonesian International Geothermal Workshop (IIGW), Bandung – 23 March 2017

Trainer, Geothermal Power Plant Operation & Maintenance
PT Cogindo, Ruteng, East Nusa Tenggara –
Batch 1: 29 July–5 August 2016
Batch 2: 22–29 August 2016

Trainer, Geothermal Reservoir and Production Engineering Knowledge and Skills
Geocap WP-1.04, Bandung – 16–27 May 2016

Trainer, Training for Operator
Bandung – October 2015