Ir. Ali Ashat Dipl.Geotherm.En.Tech
Scopus ID: 57192119417
Researchgate: https://www.researchgate.net/profile/Ali-Ashat
Doctoral Program (In Progress)
Field: Earth Resources Engineering
Institution: Kyushu University, Japan
Period: 2013 – Present
Research Title: Resource-Power Plant Optimization for Steam Dominated Geothermal Fields
Postgraduate Diploma
Field: Geothermal Energy Technology
Institution: Geothermal Institute, The University of Auckland, New Zealand
Period: March – November 1999
Project Title: The Calculation of Flash Point in Wells Discharging CO₂-Water Mixtures
Bachelor’s Degree (S-1)
Field: Petroleum Engineering
Institution: Bandung Institute of Technology (ITB), Indonesia
Period: 1989 – 1997 | Graduation: April 5, 1997
Thesis Title: Development of a Simulator for Pressure Drop Calculation in Two-Phase Geothermal Pipelines
Senior High School (SMA)
Institution: SMA Negeri 1 Pati
Location: Pati, Central Java, Indonesia
Period: 1986 – 1989
Junior High School (SMP)
Institution: SMP Negeri 1 Kudus
Location: Kudus, Central Java, Indonesia
Period: 1983 – 1986
Elementary School (SD)
Institution: SD Negeri Tamansari
Location: Pati, Central Java, Indonesia
Period: 1977 – 1983
1997
Saptadji, N.M., Ashat, A., Syihab, Z., & Soendaroe, A. (1997). GES (Geothermal Engineering Software). Proceedings of the 2nd Indonesian Geothermal Association Annual Meeting and Conference.
1999
Ashat, A. (1999). The Calculation of Flash Point in Wells Discharging CO₂-Water Mixtures. New Zealand Geothermal Workshop (Poster Session).
2002
Saptadji, N.M., Ashat, A., & Syihab, Z. (2002). Development of Software for Technical and Economical Assessment of Geothermal Project. Special Workshop on Earth Science and Technology, Institute Technology of Bandung – Kyushu University, September 17.
2003
Saptadji, N.M., Ashat, A., & Effendhy (2003). Mathematical Model for Predicting Temperature Distribution of Drilling Fluid During Geothermal Drilling. Proceedings of the 6th Indonesian Geothermal Association Annual Meeting and Conference, Bandung, June 16–18.
Ashat, A., & Prayoga, Y. (2003). Development of REUMBA (Reserve Estimation Using Material Balance Approach) Simulator and Its Application for Reserve Analysis. National Symposium of Indonesian Petroleum Association, Bandung, October 1–3.
Ashat, A. (2003). Application of Modified Isochronal Test Method to Determine the Deliverability Curve of Geothermal Wells Producing Dry Steam. National Symposium of Indonesian Petroleum Association, Bandung, October 1–3.
2004
Saptadji, N.M., Ashat, A., & Syihab, Z. (2004). Geothermal Reservoir Management Through an Integrated Reservoir Information System. Workshop on Management and Optimum Utilization of Geothermal Energy, Makati City, Philippines, April 29–30.
Ashat, A. (2004). Software to View Changes Occurring Within the Geothermal Reservoir. Workshop on Management and Optimum Utilization of Geothermal Energy, Makati City, Philippines, April 29–30.
Soelaiman, T.A.F., & Ashat, A. (2004). Preliminary Study on Geothermal Direct Utilization for Tea Drying Plant in Malabar, Indonesia. Workshop on Management and Optimum Utilization of Geothermal Energy, Makati City, Philippines, April 29–30.
2005
Saptadji, N.M., Ashat, A., & Syaifudin, A. (2005). The Use of Air Gap as an Alternative Insulation Method for Large Diameter Geothermal Pipelines. Journal of Mineral Technology (JTM), Faculty of Mineral Technology, ITB, March.
Karim, A., Hasibuan, A., Soenaryo, J., Firman, & Ashat, A. (2005). Application of Modified Isochronal Test to Determine Output Curve of Wells at Kamojang Geothermal Field, West Java. Proceedings of the World Geothermal Congress, Antalya, Turkey, April 24–29.
Saptadji, N.M., Ashat, A., Syihab, Z., & Setiadi, D.A. (2005). GETOOLS – Geothermal Engineering Tools. Proceedings of the World Geothermal Congress, Antalya, Turkey, April 24–29.
Suryantini, Ashat, A., Hutasoit, L., & Hasjim, I. (2005). Searching for an Opportunity in the Development of Direct Use Geothermal Resources; A Case Study in West Java Province, Indonesia. Proceedings of the World Geothermal Congress, Antalya, Turkey, April 24–29.
Ashat, M.A., Nurhayati, K., & Silaban, M. (2005). Optimization of Insulator Thickness to Minimize Heat Loss and Investment Cost of Geothermal Pipelines. Proceedings of the Simposium Nasional Ikatan Ahli Teknik Perminyakan Indonesia (IATMI), ITB, Bandung, November 16–18.
2006
Darwis, S., Isnani, & Ashat, M.A. (2006). Pairwise Semivariogram. *ICoMS-1 MSMSSEA*.
Wahyuningsih, S., Darwis, S., Pasaribu, U.S., Gunawan, A.Y., & Ashat, M.A. (2006). A Survey on Multiwell Decline Rate. Technical Report of ITB Research Grant 2006, No. 0004/K01.03.2/PL2.4.5/I/2006.
Darwis, S., Pasaribu, U.S., & Ashat, M.A. (2006). Characterization of Geothermal Production Wells Around Injection Well Using Markov Chain Approach. ITB Research Grant 2006.
Wahyuningsih, S., Darwis, S., Pasaribu, U.S., Gunawan, A.Y., & Ashat, M.A. (2006). A Survey on Multiwell Decline Rate. Proceedings, ICMNS ITB.
Darwis, S., Ashat, M.A., Wahyuningsih, S., Sunusi, N., & Wororomi, J. (2006). On the Distribution of Hyperbolic Decline Rate Parameters Using Multiple Regression. Proceedings, ICMNS ITB.
Ashat, M.A., Nurhayati, K., & Silaban, M. (2006). Optimization of Insulator Thickness to Minimize Heat Loss and Investment Cost of Geothermal Pipelines. Jurnal Teknologi Minyak dan Gas Bumi (JTMGB).
2007
Wahyuningsih, S., Darwis, S., Gunawan, A.Y., Permadi, A.K., & Ashat, M.A. (2007). Autoregressive Time-Varying Parameter for Arps Hyperbolic Decline Curve. *Journal Fundamental Sciences / Proceeding ICoMS2*, UTM, Johor Bahru, Malaysia.
Darwis, S., Gunawan, A.Y., Permadi, A.K., Ashat, M.A., Wahyuningsih, S., Sunusi, N., Nurzanah, E., & Umbara, R.F. (2007). Bootstrapping Nonlinear Regression. *Journal Fundamental Sciences / Proceeding ICoMS2*, UTM, Johor Bahru, Malaysia.
Darwis, S., Gunawan, A.Y., Ashat, M.A., Wahyuningsih, S., & Sunusi, N. (2007). Development of Bootstrap Simulation for Tracer Modeling. *Proceedings of the 5th SEAMS-GMU International Conference on Mathematics and Its Applications*, Yogyakarta, Indonesia.
Darwis, S., Isnani, & Ashat, M.A. (2007). Structural Analysis of Geothermal Decline Rate. Sains Malaysiana, 36(2), December.
2008
Wahyuningsih, S., Darwis, S., Gunawan, A.Y., Permadi, A.K., & Ashat, M.A. (2008). Predicting Steam Production Using Kalman Filter. Far East Journal of Theoretical Statistics, 26(2).
2009
Darwis, S., Gunawan, A.Y., Ashat, M.A., Wahyuningsih, S., & Sunusi, N. (2009). Bootstrapping Nonlinear Regression Applied to Arps Hyperbolic Decline Curve. Far East Journal of Theoretical Statistics, 27(2), 219-231.
Jose, R., Darwis, S., & Ashat, M.A. (2009). Aplikasi Simulasi Annealing dalam Memprediksi Tekanan Alir Reservoir Panas Bumi. Jurnal Sigma, 12(2), July.
2010
Tamrin, M.H., Sebastian, A.S., & Ashat, A. (2010). The Effect of CO₂ Concentration in Reservoir Simulation at TM Field. GeoNZ Conference, Auckland, New Zealand, November.
2011
Mulyadi, & Ashat, A. (2011). Wayang Windu Steam Cap Reservoir Modeling. Proceedings of the Thirty-Sixth Workshop on Geothermal Reservoir Engineering, Stanford University, SGP-TR-191.
Nusiaputra, Y.Y., Anto, D., Yahmadi, A., & Ashat, A. (2011). Geothermal Rural Electrification System and the Leverage on Society: Case Study in Lombien Island, Flores. Proceedings of the International Conference on Renewable Energy and Energy Efficiency, Bali, Indonesia, October 16-20.
Situmorang, J., Ashat, A., & Saptadji, N.M. (2011). Development of Dimensionless Inflow Performance Relationship for Geothermal Field “X”. Proceedings of the 11th Annual Indonesian Geothermal Association Meeting & Conference, Bandar Lampung, December 13-14.
2012
Sutopo, Sumbaga, A.M., & Ashat, A. (2012). Karakterisasi Distribusi Permeabilitas Reservoir Panasbumi Lapangan X Berdasarkan Model Uji Interference Menggunakan Simulator TOUGH2. Proceedings of the 12th Annual Indonesian Geothermal Association Meeting & Conference, Bandung, November 6-8.
Hikmi, M., Suryantini, & Ashat, A. (2012). Model Probabilitas dalam Penentuan Lokasi Sumur Panas Bumi Menggunakan Pendekatan Statistik Bayesian. Proceedings of the 12th Annual Indonesian Geothermal Association Meeting & Conference, Bandung, November 6-8.
Pamungkas, A.Y., Ashat, A., & Saptadji, N.M. (2012). Penggunaan Energi Balance untuk Analisis Pengaruh Injeksi terhadap Kinerja Reservoir Panas Bumi Dominasi Air. Proceedings of the 12th Annual Indonesian Geothermal Association Meeting & Conference, Bandung, November 6-8.
Oetama, N., Ashat, A., & Syihab, Z. (2012). Korelasi Empiris untuk Perhitungan Penurunan Tekanan Fluida Dua Fasa dalam Sumur Panas Bumi. Proceedings of the 12th Annual Indonesian Geothermal Association Meeting & Conference, Bandung, November 6-8.
Rahmahayana, Saptadji, N.M., & Ashat, A. (2012). Analisis Data Pengujian Sumur Panas Bumi Lapangan X. Proceedings of the 12th Annual Indonesian Geothermal Association Meeting & Conference, Bandung, November 6-8.
2013
Permatasari, D., Sugandhi, A., Saptadji, N.M., Herdianita, N.R., Ashat, A., & Suryanta, R. (2013). Prediction of Carbon Behaviors with Emphasis on Clean Development Mechanism: The Darajat Geothermal Field – Preliminary Study. Proceedings of the Thirty-Eighth Workshop on Geothermal Reservoir Engineering, Stanford University, SGP-TR-198.
Rudi, Hendrarsakti, J., Syihab, Z., & Ashat, A. (2013). Modification of Compressible Flow Equation for Single Phase Steam Geothermal Well. Proceedings of the 2nd ITB Geothermal Workshop, Bandung, March 4-8.
Martikno, R., Humaedi, M.T., Ashat, A., Situmorang, J., Novianto, & Hadi, J. (2013). Evaluation of Weirs Calculation: Numerical Study. Proceedings of the 13th Indonesia International Geothermal Convention & Exhibition (IIGCE), Jakarta, June 12–14.
Wijaya, A., & Ashat, A. (2013). Evaluation of Formation Temperature Determination Methods in Geothermal Well Based on the Accuracy Level and the Validity of Data at Early Time Condition. Proceedings of the 13th Indonesia International Geothermal Convention & Exhibition (IIGCE), Jakarta, June 12–14.
Taqwim, S., Saptadji, N.M., & Ashat, A. (2013). Measuring the Potential Benefits of Geothermal Cooling and Heating Applications in Indonesia. Proceedings of the 13th Indonesia International Geothermal Convention & Exhibition (IIGCE), Jakarta, June 12–14.
Hendrarsakti, J., Febrynzki, D., & Ashat, A. (2013). Steam Mass Flow Rate Solution for Critical Flow Using Numerical Analysis. Proceedings of the 13th Indonesia International Geothermal Convention & Exhibition (IIGCE), Jakarta, June 12–14.
Taqwim, S., Saptadji, N.M., Ashat, A., & Nugraha, T. (2013). The Prospects for Large Scale Applications of Geothermal Cooling in Indonesia. Proceedings of the New Zealand Geothermal Workshop, Rotorua, New Zealand, November 17-20.
Adityawan, S.K., Saptadji, N.M., & Ashat, A. (2013). Development of Mathematical Model to Predict Sulfide Scaling in Geothermal Wells. Proceedings of the New Zealand Geothermal Workshop, Rotorua, New Zealand, November 17-20.
Ashat, A., Hardiani, N.P., Yani, A., & Itoi, R. (2013). Natural State Numerical Model of Lahendong Geothermal Reservoir, North Sulawesi, Indonesia. Proceedings of the CINEST International Symposium on Earth Science and Technology, Fukuoka, Japan, December 3-4. (Paper No. CINEST13-15)
2017
Ashat, A., & Pratama, H.B. (2017). Application of Experimental Design in Geothermal Resources Assessment of Ciwidey-Patuha, West Java, Indonesia. Proceedings of the 6th ITB International Geothermal Workshop, Bandung, March 22–23.
Ashat, A., & Pratama, H.B. (2017). Application of Experimental Design in Geothermal Resources Assessment of Ciwidey-Patuha, West Java, Indonesia. IOP Conference Series: Earth and Environmental Science, 103, 012009. https://doi.org/10.1088/1755-1315/103/1/012009
2018
Ashat, A., Pratama, H.B., & Itoi, R. (2018). Updating Conceptual Model of Ciwidey-Patuha Geothermal Using Numerical Model. Proceedings of the 7th ITB International Geothermal Workshop, Bandung, March 21–22.
Ashat, A., Pratama, H.B., & Itoi, R. (2018). Comparison of Resource Assessment Methods with Numerical Reservoir Model Between Heat Stored and Experimental Design: Case Study Ciwidey-Patuha Geothermal Field. Proceedings of the 7th ITB International Geothermal Workshop, Bandung, March 21–22.
Ashat, A., Saptadji, N.M., Prabata, W., & Pratama, H.B. (2018). Re-model of Grid Block System of Ciwidey-Patuha Geothermal System. Grand Renewable Energy 2018 International Conference and Exhibition, Yokohama, Japan, June 17-22.
Widiatmo, J.S., Ashat, A., Saptadji, N.M., Sutopo, & Pratama, H.B. (2018). A Numerical Modeling Study to Investigate Changes Within the Reservoir and Production Sustainability Under Two Different Conversion Technology Scenarios Producing from Reservoir Steam Zone in Patuha Geothermal Field. 15th International Symposium on Mineral Exploration (ISME 2018), Kyoto, Japan, November 26–28.
2019
Ashat, A., Pratama, H.B., & Itoi, R. (2019). Updating Conceptual Model of Ciwidey-Patuha Geothermal Using Numerical Model. IOP Conference Series: Earth and Environmental Science, 254, 012010. https://doi.org/10.1088/1755-1315/254/1/012010
Ashat, A., Pratama, H.B., & Itoi, R. (2019). Comparison of Resource Assessment Methods with Numerical Reservoir Model Between Heat Stored and Experimental Design: Case Study Ciwidey-Patuha Geothermal Field. IOP Conference Series: Earth and Environmental Science, 254, 012011. https://doi.org/10.1088/1755-1315/254/1/012011
Winofa, N.C., Lesmana, A., Pratama, H.B., Saptadji, N.M., & Ashat, A. (2019). The Application of Numerical Simulation Result for Geothermal Financial Model with Probabilistic Approach: A Comprehensive Study. Proceedings of the 7th Indonesia International Geothermal Convention & Exhibition (IIGCE), Jakarta, August 13-15.
Lesmana, A., Winofa, N.C., Pratama, H.B., Ashat, A., & Saptadji, N.M. (2019). Preliminary Financial Modelling with Probabilistic Approach for Geothermal Development Project in Indonesia. Proceedings of the 7th Indonesia International Geothermal Convention & Exhibition (IIGCE), Jakarta, August 13-15.
Ashat, A., Ridwan, R.H., Prabata, W., Situmorang, J., Elfina, Adityawan, S., & Ibrahim, R.F. (2019). Numerical Simulation Update of Dieng Geothermal Field, Central Java, Indonesia. Proceedings of the 41st New Zealand Geothermal Workshop, Auckland, New Zealand, November 25-27.
Ashat, A., Ridwan, R.H., Judawisastra, L.H., Situmorang, J., Elfajrie, I., Atmaja, R.W., Iskandar, C., & Ibrahim, R.F. (2019). Conceptual Model and Numerical Simulation Update of Patuha Geothermal Field, West Java, Indonesia. Proceedings of the 41st New Zealand Geothermal Workshop, Auckland, New Zealand, November 25-27.
Lesmana, A., Pratama, H.B., Ashat, A., Saptadji, N.M., & Gunawan, F. (2019). An Updated Conceptual Model of the Tompaso Geothermal Field Using Numerical Simulation. Proceedings of the 41st New Zealand Geothermal Workshop, Auckland, New Zealand, November 25-27.
2020
Winofa, N.C., Lesmana, A., Pratama, H.B., Saptadji, N.M., & Ashat, A. (2020). The Application of Numerical Simulation Result for Geothermal Financial Model with Probabilistic Approach: A Comprehensive Study. IOP Conference Series: Earth and Environmental Science, 417, 012020. https://doi.org/10.1088/1755-1315/417/1/012020
Lesmana, A., Winofa, N.C., Pratama, H.B., Ashat, A., & Saptadji, N.M. (2020). Preliminary Financial Modelling with Probabilistic Approach for Geothermal Development Project in Indonesia. IOP Conference Series: Earth and Environmental Science, 417, 012024. https://doi.org/10.1088/1755-1315/417/1/012024
Pratama, H.B., Sutopo, Widiatmo, J.S., & Ashat, A. (2020). Numerical Investigative Modeling of Changes Within the Patuha Geothermal Reservoir and Its Production Sustainability Under Two Different Conversion Technologies. Natural Resources Research. https://doi.org/10.1007/s11053-020-09748-7
2021
Wardoyo, G.K., Pratama, H.B., Sutopo, Ashat, A., & Yudhistira, Y. (2021). Application of Artificial Intelligence in Forecasting Geothermal Production. IOP Conference Series: Earth and Environmental Science, 732, 012022. https://doi.org/10.1088/1755-1315/732/1/012022
Idianto, O., Saptadji, N.M., Ashat, A., Pratama, H.B., & Nusiaputra, Y.Y. (2021). Incremental Development Strategy of Geothermal Field Using Wellhead Unit Technology: Case Study Ulumbu Geothermal Field. IOP Conference Series: Earth and Environmental Science, 732, 012025. https://doi.org/10.1088/1755-1315/732/1/012025
Lesmana, A., Pratama, H.B., Ashat, A., & Saptadji, N.M. (2021). Sustainability of Geothermal Development Strategy Using a Numerical Reservoir Modeling: A Case Study of Tompaso Geothermal Field. Geothermics, 96, 102170. https://doi.org/10.1016/j.geothermics.2021.102170
Sutopo, Saptadji, N.M., Suryantini, Ashat, A., Pratama, H.B., Hardiani, N., Pratama, A.B., & Maulana, D.T. (2021). 10 Years of Institut Teknologi Bandung Geothermal Engineering Master’s Program. *Proceedings of the World Geothermal Congress 2020+1*, Reykjavik, Iceland.
Sutopo, Saptadji, N.M., Suryantini, Ashat, A., Syihab, Z., Pratama, A.B., Maulana, D.T., Pratama, H.B., & Hardiani, N. (2021). International Geothermal Master’s Program. *Proceedings of the World Geothermal Congress 2020+1*, Reykjavik, Iceland.
2022
Hidayaturrobi, A.D., Yudhistira, A.D., Putri, R.P., Maulana, D.T., Saptadji, N.M., & Ashat, A. (2022). AWI A-4 Comprehensive Well Evaluation for Successful Well Intervention Program. IOP Conference Series: Earth and Environmental Science, 1014, 012014. https://doi.org/10.1088/1755-1315/1014/1/012014
Wijaya, B.A., Pratama, H.B., Ashat, A., Sutopo, & Hidayaturrobi, A.D. (2022). Reservoir Dynamics Monitoring in a Liquid Dominated Geothermal Field Based on Surveillance Data and Tracer Flow Test. IOP Conference Series: Earth and Environmental Science, 1014, 012007. https://doi.org/10.1088/1755-1315/1014/1/012007
2023
Andriana, R., Hendrarsakti, J., Ashat, A., & Maulana, D.T. (2023). Feasibility Study of Utilizing Geothermal Energy for Bitcoin Mining at Tulehu Geothermal Field. Proceedings of the ITB International Geothermal Workshop, 11. ISSN 2830-2818.
Sutama, C.S., Ashat, A., Alkano, D., & Riyadi, S. (2023). Economic Assessment of Lithium Extraction from Geothermal Brine: Comparative Analysis Worldwide and Indonesia’s Prospects. Proceedings of the 9th Indonesia International Geothermal Convention & Exhibition (IIGCE).
2024
Pratama, H.B., Koike, K., Bakti, A., & 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
Supijo, M.C., Elfajrie, I.A., Kamila, Z., Elfina, Fajri, R.J., Alibazah, J.A., Kencana, A.Y., Nurpratama, M.I., & Ashat, A. (2024). Dieng Reservoir Numerical Model: A Robust Update. Proceedings of the 49th Workshop on Geothermal Reservoir Engineering, Stanford University, SGP-TR-227.
Kamila, Z., Elfajrie, I., Supijo, M., Herdian, R., Dwiyatmoko, N., Nurpratama, M.I., & Ashat, A. (2024). Discharge Stimulation in Two-Phase Liquid-Dominated Wells in Dieng Field, Indonesia: Lessons Learned. Proceedings of the 49th Workshop on Geothermal Reservoir Engineering, Stanford University, SGP-TR-227.
Keintjem, R.J., Elfajrie, I.A., Wardana, A.P., Iskandar, C., Sujarmaitanto, H., Sesesega, R.S., Nurpratama, M.I., & Ashat, A. (2024). Dynamic Numerical Simulation for Sustainability of Geothermal Reservoirs: An Enhanced Model of Patuha Geothermal Field. Proceedings of the 49th Workshop on Geothermal Reservoir Engineering, Stanford University, SGP-TR-227.
Pratama, H.B., 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. http://dx.doi.org/10.1016/j.geothermics.2024.103020
Ashat, A., Pratama, H.B., Itoi, R., Judawisastra, L.H., Ridwan, R.H., & Elfajrie, I. (2024). An Updated Numerical Model of Patuha Geothermal Field for Optimization and Sustainable Production. Geothermics, 121, 103052. http://dx.doi.org/10.1016/j.geothermics.2024.103052
2025
Sutama, C.S., Ashat, A., Nur, S., & Alkano, D. (2024). Comparative Analysis of Geothermal PPPs: International Insights and Indonesia’s Cases. The 10th Indonesia International Geothermal Convention & Exhibition (IIGCE).
Nugroho, A.A., Sutopo, & Ashat, A. (2025). Pressure Prediction in Two-Phase Geothermal Well Flow Using Physics Informed Neural Network (PINN). IOP Conference Series: Earth and Environmental Science, 1456, 012008. https://doi.org/10.1088/1755-1315/1456/1/012008
Canilandi, M.P., Sutopo, Ashat, A., & Sinurat, P.D. (2025). The Application of Physics-Informed Neural Networks (PINNs) for Geothermal Well Thermal Recovery Post-Injection. IOP Conference Series: Earth and Environmental Science, 1456, 012006. https://doi.org/10.1088/1755-1315/1456/1/012006
Asy’ari, M.B.A., Suryantini, Ashat, M.A., & Nusiaputra, Y.Y. (2025). Evaluation of Ulumbu Geothermal Development Drilling Through Expected Monetary Value Analysis. Proceedings of the 5th ITB International Graduate School Conference. https://gcs.itb.ac.id/proceeding-igsc/index.php/igsc/article/view/260/211
Pratama, H.B., 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
Indratmoko, K.P., Zulfikri, A., & Ashat, A. (2025). Particle Swarm Optimization-Based Calibration of Drift-Flux Model Parameters for Geothermal Wellbore Simulation. The 11th Indonesia International Geothermal Convention & Exhibition (IIGCE).
Sutama, C.S., Bornaz, S., Swarnanto, L.D., & Ashat, A. (2025). Indonesia’s Geothermal Beyond Power: Learning from Europe’s Direct Use Experience. The 11th Indonesia International Geothermal Convention & Exhibition (IIGCE).
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Geostatistical Resource Modelling Using Excel
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Cost Reduction through Improved Geothermal Well Targeting
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STARS CMG-Geothermal Reservoir Modeling Training
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Train the Trainer for Geothermal Industry Subject Matter Experts
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