Geothermal · Subsurface · Energy transition
Subsurface expertise that makes geothermal projects investable.
FSTH Enerji Teknolojileri is a Türkiye-based energy technology and advisory company for geothermal power. We combine two decades of reservoir, fluid chemistry and plant experience with physics-informed data methods, so operators, developers and lenders can see what a geothermal asset can really deliver and how to get there.
20+ years
our founder's combined industry and academic experience
100+
publications, cited 700+ times
80+ wells
and separation stations under inhibition programs our founder managed
Since 2017
member of ETIP-DG, the EU deep-geothermal platform
Our Business
Advisory and technology across the geothermal lifecycle.
We turn reservoir, fluid and operating data into explainable decisions that reduce project risk and protect long-term value for developers, operators, lenders, public agencies and the technology companies that serve them.
- 01
Reservoir & Hydrogeochemistry
Long-term reservoir monitoring and fluid chemistry are the evidence base for every production and reinjection decision. We design the monitoring, interpret the data and translate it into operating rules.
Monitoring designFluid chemistryReinjection - 02
Plant Performance & Operations
From rehabilitation of an aging unit to daily operation under Western Anatolian summer conditions, we work on the interface between the wells and the plant, where most avoidable output losses happen. We separate what the resource and the weather take away from what operations can win back.
EfficiencyInhibitionEmissions - 03
Digital & AI for Geothermal Assets
We combine physical and thermodynamic models with data-driven methods in one framework, so a performance deviation is not only detected but explained, and alternative operating conditions can be simulated with engineering-grade justification. Plant- and software-independent by design.
Digital twinsMachine learningDecision support - 04
Energy-Transition Technologies
Geothermal fields are also subsurface assets for the next decade's technologies. We assess what a field can additionally host or produce, and what it would take.
CCSNatural hydrogenCritical minerals - 05
Strategic & Funding Advisory
Technical credibility for financing and funding decisions: the documents lenders read, the consortia Horizon Europe rewards, and the roadmaps regulators expect.
Due diligenceHorizon EuropeRoadmaps
Collaborations
Partnerships that bring international capability to the region.
We work in consortia and alliances rather than alone: with technology companies entering Türkiye and Europe, with operators, and with research networks across the EU geothermal community.
Strategic partner
New England Research, Inc. (NER)
Since June 2026
FSTH Enerji's founder serves as NER's Senior Strategic Advisor and Regional Lead for Europe, Türkiye and neighboring geographies. In this role she positions NER's rock mechanics, geomechanics and subsurface stimulation capabilities in regional geothermal projects and Horizon Europe consortia.
ner.com
Learn With us
Training built from operating experience, not slides alone.
Programs for engineering teams, executives and lenders. On site or online, in Turkish or English.
Executive & technical workshops
Short, decision-oriented sessions on reservoir sustainability, scaling control and plant efficiency for management and project teams.
Training programs
Structured courses on geothermal hydrogeochemistry, reinjection, digital twins and AI-supported monitoring, adapted to each team's plants and data.
Insights & media
Articles, talks and interviews on geothermal, hydrogen and AI in energy.
Student Communication Corner
A direct line for students and early-career researchers.
Thesis questions, research topics, internship inquiries or career advice in geoscience and energy engineering: write to us here. Every message is read and answered personally.
- Thesis & research questions
- Internship and site-experience inquiries
- Mentorship and career questions
About us
Founded on two decades between the field and the lecture hall.
FSTH Enerji Teknolojileri was founded by Assoc. Prof. Dr. Füsun Servin Tut Haklıdır, a geoscientist and energy systems academic whose career spans Zorlu Enerji's geothermal operations (Kızıldere, Alaşehir and exploration fields across Türkiye) and Istanbul Bilgi University. She serves on the IGA Standard Committee (since 2025), ETIP-DG (since 2017) and the European Commission's Horizon Europe evaluator pool (since 2022).
The company works with a network of specialist partners so that each engagement gets the right combination of reservoir, plant, digital and funding expertise.
Tell us about your project.
A first conversation is free and confidential. We reply in Turkish or English.
[info@fsthenerji.com] · +90 262 676 62 00 · LinkedIn