Impact of brines and gasses extraction and CO₂ capture on the conditions of a geothermal reservoir in an intracratonic sedimentary basin

This PhD position is part of the MSCA Doctoral Network MiningBrines (https://miningbrines.eu/), which aims to develop sustainable strategies for the extraction and valorization of critical raw materials, energy gases, and geothermal energy from geothermal brines.

The research of this position focuses on assessing the impact of fluid extraction and CO₂ capture and reinjection on the thermo-hydro-mechanical and geochemical conditions of geothermal reservoirs in sedimentary basins. The work includes the development of integrated geological models, geochemical and petrophysical characterizations of the reservoir and brines, and numerical simulations to evaluate fluid flow, stress redistribution, and water–rock interaction processes.

The methodology combines field investigations, laboratory analyses, and numerical modelling. The candidate will benefit from secondments at partner institutions, including industrial partners, within an international and interdisciplinary research environment.

The Croatian Geological Survey (HGI-CGS) is the national public research institution responsible for geological and hydrogeological investigations in Croatia. Its activities include research on geology, engineering geology, hydrogeology, mineral resources, environmental protection, and geohazards, supporting both scientific advancement and public policy.

Within the framework of the MiningBrines project, HGI-CGS is integrated into an international network of leading academic and industrial partners. This provides the candidate with access to advanced analytical facilities, multidisciplinary expertise, and opportunities for collaboration and secondments across Europe.

• MSc degree (or equivalent) in geosciences, geology, hydrogeology, mining, petroleum or environmental engineering, or related fields
• Interest in geothermal systems, subsurface processes, geochemistry, and/or numerical modelling
• Good command of English (minimum B2)
• Ability to work independently and in an international team
• Applicants must comply with MSCA Doctoral Network rules: 1) Must not hold a doctoral degree at the time of recruitment; 2) Must respect the mobility rule: candidates must not have resided or carried out their main activity in Croatia for more than 12 months in the 36 months prior to recruitment
• computer literacy
• ability to work independently