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Disputation: Lina Hedvig Line

Doctoral candidate Lina Hedvig Line at the Department of Geosciences, Faculty of Mathematics and Natural Sciences, is defending the thesis Reservoir quality and prospectivity of Lower - Middle Mesozoic sandstones of the Barents Shelf for the degree of Philosophiae Doctor.

Lina Hedvig Line. Photo: Private

Lina Hedvig Line. Photo: Private

The PhD defence and trial lecture are fully digital and streamed using Zoom. The host of the session will moderate the technicalities while the chair of the defence will moderate the disputation.

Ex auditorio questions: the chair of the defence will invite the audience to ask ex auditorio questions either written or oral. This can be requested by clicking 'Participants -> Raise hand'. 

Trial lecture

Weathering and climate: implications for sediment properties

Conferral summary

Silisiclastic sandstones are important reservoir rocks for storing water, oil and gas in the subsurface. As such, they represent economic and life-supporting resources to ancient and modern societies worldwide. In order to facilitate efficient exploration and sustainable exploitation and management of subsurface reservoirs in the future, geological processes enhancing or reducing porosity and permeability need to be understood. This thesis aims to better constrain geological processes resulting in porosity preservation in siliciclastic reservoir rocks, using Mesozoic sandstone successions of the Barents Shelf as a case study. The study shows that the geological history of the sedimentary rocks played an essential role in the development and preservation of high-quality sandstone reservoirs.

Main research findings

Popular scientific article about Lines dissertation:

Reservoir quality and prospectivity of Lower - Middle Mesozoic sandstones of the Barents Shelf 

Siliciclastic sandstones constitute important reservoirs for subsurface storage of water, oil and natural gas. Knowledge of the geological processes enhancing or reducing the key reservoir properties – porosity and permeability – is necessary to secure sustainable exploration, exploitation and management of these underground resources.

Bildet kan inneholde: blå, koboltblå, turkis, blågrønn, elektrisk blå.
Thin sections of Mesozoic sandstones from the Barents Shelf reveal a framework of fine-grained sand particles with a diverse mineral assembly. Blue areas represent the porosity of the sandstone, in which fluids can be stored. Photo: Thin Section Workshop and Laboratory / Dept. of Geosciences, UiO.

The sedimentary rock record of the Barents Shelf hosts a variety of sandstone reservoirs. The study shows that reservoir properties are governed mainly by 1) the surrounding provenance terrains, 2) processes operating in the depositional environments and 3) compaction processes during burial.

Tectonic uplift has also had a substantial impact on the distribution of high-quality sandstone reservoirs. Findings from this study can be applicable to other sedimentary basins of similar geochemistry and equivalent tectonic complexity.

Photo and other information:

Press photo: Lina Hedvig Line, portrait; 500px. Photo: Private

Other photo material: Figure with description and credit as specified in the article above, size 1000px.

Published Sep. 11, 2020 10:00 AM - Last modified Oct. 4, 2021 12:49 PM