Overview 

Within the COMPASS project, a new generation of digital tools has been developed to improve the way geothermal wells are designed and evaluated — particularly in superhot and high-enthalpy geothermal environments. 
These tools bring together thermal, mechanical, chemical, and economic modelling to help engineers and developers plan wells that are safer, more sustainable, and more cost-efficient. 

Developed Tools and Models 

Advanced Cement Models 

Simulation tools that predict the placement and hydration of foamed cement systems. 
They integrate thermo-chemo-poro-elastoplastic behaviour, allowing users to understand how cement evolves under extreme temperature and pressure. 

Set-Cement Structural Models 

Material models that account for porosity and pore-pressure effects, coupled with hydration dynamics to establish realistic starting conditions for structural analysis. 

Wellbore Thermic Modelling 

A multiphase-flow simulation for predicting temperature and pressure profiles throughout the life of a well — from stimulation to production. 

Structural Integrity and Thermal Fatigue Analysis 

Numerical tools to evaluate mechanical integrity and thermal fatigue of critical well components such as casings, cement, and couplings, identifying stress concentration points and potential weak spots. 

Cost and Life-Cycle Assessment (LCA) Models 

Economic and environmental models that estimate well completion costs (€ / m) and surface plant costs (€ / MW), using SimaPro and the ecoinvent database in line with ISO 14040/44 standards. 

Decision-Support Platform 

A web-based system integrating all models into a single, user-friendly interface. 
It enables comparison of design alternatives, materials, and investment options, supporting both technical and strategic decision-making. 

Software Platforms 

CurisIntegrity 

Specialised software for modelling cement system behaviour in high-temperature geothermal and oil & gas wells. 
Implements the cement placement and hydration models developed within COMPASS. 
Developed by: CURISTEC (France) 
Contact: Rym Bouchair 

Cost & LCA Web App 

An online demonstrator that estimates economic and environmental impacts of surface plants utilising superhot geothermal resources. 
Developed by: Technovative Solutions Ltd (UK) 
Contact: Hye Chowdhury 

Casinteg 

A comprehensive web application for casing design and well-integrity assessment. 
Users can: 

• Define well geometry and materials 

• Set temperature and pressure profiles at different life stages 

• Assess mechanical integrity 

• Compute cost and environmental impact 

Developed by: SINTEF AS (Norway) 
Contact: Terence Coudert 
Access: https://casinteg.azurewebsites.net/ 

Impact 

• Enables accurate and efficient design of geothermal wells under extreme conditions 

• Supports sustainable and cost-effective development of deep geothermal resources 

• Provides integrated tools for risk assessment, performance prediction, and optimisation 

• Combines technical, economic, and environmental evaluations in a unified framework 

Acknowledgement 

This work was carried out as part of the COMPASS Project, funded by the European Union’s Horizon Europe Programme (Grant Agreement No. 101084623). 
Funded by the European Union. Views and opinions expressed are those of the author(s) only and do not necessarily reflect those of the European Union or CINEA. Neither the European Union nor the granting authority can be held responsible for them.