PhD position on 'Induced Seismicity and Geothermal Energy Production in the Netherlands' (1.0 FTE)
Induced seismicity can occur in geothermal energy production, and is documented in many high enthalpy production systems around the globe and in settings where hydraulic fracking has been applied for the enhancement of reservoir quality. In the Netherlands, low enthalpy systems are being developed in permeable reservoirs without the need for reservoir stimulation. However, in the -tectonically active- South-Eastern part of the country few small events with magnitude up to M~2 have occurred, which may likely be related to geothermal operation, and have resulted in suspension of the geothermal production systems in that region.
Consequently, also in face of induced seismicity associated with Groningen Gas production, there is public concern over the possible occurrence of induced seismicity in geothermal operations. Are the ongoing and planned geothermal operations in the Netherlands safe in terms of potential risks for induced seismicity? Can it be precluded that over lifetime progressively more seismic events may manifest itself only decades after the start of production such as in Groningen Gas production?
For existing and new geothermal production systems in the Netherlands, in WarmingUP we aim to improve our understanding on potential hazards for induced seismicity, over the production lifetime. Therefore, predictive models are needed, which can assess the likelihood for the occurrence of induced events and the exceedance of threshold magnitudes over the lifetime of geothermal energy production. To this end, the PhD will co-develop, with a multi-disciplinary team of scientists in WarmingUP, model capabilities for changes in stresses and associated seismic hazards for typical geothermal reservoirs in the Netherlands. The models will be tested and validated on case studies, representative for the Dutch setting. A key focus of the research is to enhance fundamental insight in the correlation between (the absence of) seismic hazards and specific subsurface in-situ conditions (e.g. stress, structures, reservoir and over-/underburden rock properties) on one hand and operational conditions on the other hand.
The predictive models build on the extension of geomechanical models available in TNO (e.g MACRIS for prediction of stress changes in structurally complex reservoirs as a function of pressure and temperature change), as well as event-rate en hazard prediction models on the basis of workflows developed for Groningen, and including logic tree concepts.
For subsurface parametrisation, the PhD candidate will contribute to the national compilation and analysis of subsurface in-situ (or baseline conditions) which are of significant relevance for the effect on seismic hazards and includes (amongst others) in-situ stress, base line seismicity, distance and orientation of faults, reservoir conditions (fracture of matrix porosity) and thermo-mechanical properties.
The research team is highly interdisciplinary and includes Prof. Jan-Diederik van Wees (supervisor, UU/TNO) and Dr. Fred Beekman (UU), and a supervisory and advisory team from WarmingUP, including Induced Seismicity Project leader Brecht Wassing (TNO), Dr. Thibault Candela (TNO), Dr. Jan ter Heege (TNO). The research will be performed at Utrecht University and TNO.
Up to 10% of the candidate's time will be dedicated to assisting in the BSc and MSc teaching programmes of the Department of Earth Sciences. A personalised training programme will be set up, mutually agreed on recruitment, which will reflect the candidate's training needs and career objectives.
Besides that, you will receive a holiday allowance of 8% and a year-end bonus of 8.3%. Utrecht University also has an appealing package of terms of employment , including the choice for a good balance between work and private (a good arrangement for leave, among other things), possibilities for development and an excellent pension scheme. More information on working at Utrecht University can be found here
About the organization
A better future for everyone. This ambition motivates our scientists in executing their leading research and inspiring teaching. At Utrecht University , the various disciplines collaborate intensively towards major societal themes. Our focus is on Dynamics of Youth, Institutions for Open Societies, Life Sciences and Sustainability.
Utrecht University's Faculty of Geosciences studies the Earth: from the Earth's core to its surface, including man's spatial and material utilisation of the Earth - always with a focus on sustainability and innovation. With 3400 students (BSc and MSc) and 720 staff, the Faculty is a strong and challenging organisation. The Faculty of Geosciences is organised in four Departments: Earth Sciences, Human Geography & Spatial Planning, Physical Geography, and Sustainable Development.
The Department of Earth Sciences conducts teaching and research across the full range of the solid Earth and environmental Earth sciences, with activities in almost all areas of geology, geochemistry, geophysics, biogeology and hydrogeology. The department hosts a highly international group of more than one hundred PhD candidates and postdoctoral researchers and houses, or has access to, a wide variety of world-class laboratories.
Everyone deserves to feel at home at our university. We welcome employees with a wide variety of backgrounds and perspectives.
To apply, please send your curriculum vitae, including a letter of motivation via the ‘apply’ button below.
Applications are accepted until August 30th, 2020. Evaluations and interviews are planned in September. The expected starting date can be as early as October 1st, 2020, but no later than December 1st, 2020.
The application deadline is
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