The PhD defence and trial lecture will be held in Auditorium 1, The Geology Building. In some cases, it will be possible to attend the trial lecture and dissertation digitally, in that case a link to Zoom will be posted.
Trial lecture
Wednesday 14 December, 13:15-14:00, Aud 1, The Geology Building:
Geomechanical constraints and challenges in CCS operations
Conferral summary (in Norwegian)
Skifer er en vanlig bergart i jordskorpa, laget ved at sand, leire og grus er avsatt i sedimenter som er presset sammen. Sedimentene bygger seg opp lagvis og det kan oppstå høy temperatur og høyt trykk i massene. I denne avhandlingen undersøkers skifer som påvirkes av høy temperatur og trykk; Hva er årsaken til at skiferen sprekker og hvordan oppfører bergartene og væskene som dannes underveis når hovedstrukteren sprekker?
Main research findings
Popular scientific article about Johnson’s dissertation:
Integrated analysis of kerogen maturation and microfracture dynamics in organic-rich shales
The thesis investigates what causes the creation and growth of microfractures within shales of natural systems. Note, shales represent roughly 50% of all rocks at or near the surface on the Earth.
The approach of the study was conducted at both a very large scale (km) and very small scale (um). This in order to better understand the behavior of shales as a whole, and the impact when influenced by high pressure and temperatures.
A particular focus was placed on the relationship between the organic and inorganic components. The result of this and findings are clear boundaries around the degree to which the organic material could potentially impact the properties of the shale for a broad variety of use cases in the future like e.g. geothermal energy, CCUS, nuclear waste storage, critical resource extraction, geotechnical analysis, and similar purposes.
Photo and other information:
Press photo: James Ronald Johnson, portrait; 700px. Photo: Private
Other photo material: Figure with description and credit as specified in the article above, size 750px.
