Fault deformation and sealing properties in coal-bearing reservoir rocks

Understanding the hydraulic properties of faults, and their ability to act as seals or baffles to fluid flow in shallow crustal reservoir rocks, is critical for a wide range of applications where subsurface fluid flow plays a key role. These applications include, but are not limited to, underground carbon storage, groundwater systems, and hydrocarbon exploration and production. Within the Norwegian Continental Shelf (NCS) and the North Sea basins, faults and deformation bands affect siliciclastic reservoir rocks containing also coal seams and coaly sediments. Despite the extensive exploitation of these basins, relatively little research has focused on the influence of coal entrainments on the structural, petrophysical, and sealing properties of faults and deformation bands, and on their effect on subsurface fluid flow.

Supervisors

Main supervisor: Miriana Chinello, UiB-GEO
Co-supervisor: Matteo Demurtas, UiB-GEO
Co-supervisor: Atle Rotevatn, UiB-GEO

Project description

This project aims to characterize how coal entrainments influence (i) the style of deformation of faults and deformation bands, and (ii) the porosity and permeability properties of fault rocks. The study will integrate:

  1. Structural characterization of previously sampled cores from offshore fields along the NCS and North Sea;
  2. Microstructural analysis of faulted reservoir rocks and coal using optical microscopy, scanning electron microscopy (SEM), and cathodoluminescence;
  3. Porosity quantification through image analysis techniques.

Based on the student's interest and work, there will be the possibility to expand the analytical approach to include mineralogical and chemical characterization (XRPD, Raman) of host rock and deformed samples.

Through this Master’s project, the student will learn how to address a geological research question using a multidisciplinary approach and will gain hands-on experience with a range of versatile laboratory-based techniques widely applied in structural geology and reservoir characterization.

The student taking on the project will ideally have an interest in structural geology and microscopy. Knowledge/interest of regional geology in the North Sea and NCS will be an advantage.

Field-, lab- and analysis work

Microstructural characterization coal entrainments within fault and deformation bands in siliciclastic reservoir rocks will form the core of the thesis’ work and will be complemented by porosity quantification of host rock and fault/deformation band samples.

Proposed course plan during the master's degree (60 ECTS)

GEOV242 - Petrology
GEOV302 - Data analysis in earth science
GEOV342 - The Geochemical Toolbox
GEOV251 - Advanced Structural Geology
GEOV300 - Scientific writing and communication in Earth Science
GEOV341 - Thermochronology and Tectonics
GEOV364 - Advanced basin analysis

DEFCOAL
Outcrop of faulted coal layer. . Foto Matteo Demurtas
Sist oppdatert: 18.06.2026