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A probabilistic assessment of the effective CO2 storage capacity within the Swedish sector of the Baltic Basin
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics.
2014 (English)In: International Journal of Greenhouse Gas Control, ISSN 1750-5836, E-ISSN 1878-0148, Vol. 30, 148-170 p.Article in journal (Refereed) Published
Abstract [en]

A regional assessment of the effective CO2 storage capacity within the Swedish Sector of the Baltic Sea Basin has been performed. Storage within several deep Cambrian sandstone aquifers, sealed by a thick sequence of Ordovician and Silurian limestone and marlstone, was investigated. Stratigraphic and structural traps were considered within the Faludden, Nar and Viklau reservoirs. Effective CO2 storage capacities and associated uncertainty were calculated probabilistically, using methods outlined by the U.S. Department of Energy and the U.S. Geological Survey. Detailed characterisation of porosity, reservoir thickness, top reservoir structure, CO2 density and storage efficiency factor was performed. A Monte Carlo approach was adopted to generate distributions of effective storage capacity for the scenarios considered. Within the study area, the most suitable structural trap is the S41/Dalders structure, located in the southeastern part of the Swedish sector, with estimated low, mid and high storage capacities of 85 Mt, 145 Mt and 224 Mt, respectively. The regional Faludden stratigraphic pinch out trap was assessed to have low, mid and high effective storage capacities of 4330 Mt, 5579 Mt and 6962 Mt, respectively. The storage capacity methodology outlined here, that includes estimates of uncertainties, may be easily adapted to other areas of interests for geological storage of CO2.

Place, publisher, year, edition, pages
2014. Vol. 30, 148-170 p.
Keyword [en]
OPAB dataset, Storage efficiency factor, Faludden/Deimena, Nar/Viklau, Deep saline aquifers, Uncertainty assessment
National Category
Geophysics
Identifiers
URN: urn:nbn:se:uu:diva-240130DOI: 10.1016/j.ijggc.2014.09.009ISI: 000345470700015OAI: oai:DiVA.org:uu-240130DiVA: diva2:776880
Available from: 2015-01-08 Created: 2015-01-05 Last updated: 2017-12-05Bibliographically approved
In thesis
1. Characterization of the structure, stratigraphy and CO2 storage potential of the Swedish sector of the Baltic and Hanö Bay basins using seismic reflection methods
Open this publication in new window or tab >>Characterization of the structure, stratigraphy and CO2 storage potential of the Swedish sector of the Baltic and Hanö Bay basins using seismic reflection methods
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

An extensive multi-channel seismic dataset acquired between 1970 and 1990 by Oljeprospektering AB (OPAB) has recently been made available by the Geological Survey of Sweden (SGU). This thesis summarizes four papers, which utilize this largely unpublished dataset to improve our understanding of the geology and CO2 storage capacity of the Baltic and Hanö Bay basins in southern Sweden.

A range of new processing workflows were developed, which typically provide an improvement in the final stacked seismic image, when compared to the result obtained with the original processing. A method was developed to convert scanned images of seismic sections into SEGY files, which allows large amounts of the OPAB dataset to be imported and interpreted using modern software. A new method for joint imaging of multiples and primaries was developed, which is shown to provide an improvement in signal to noise for some of the seismic lines within the OPAB dataset. For the first time, five interpreted regional seismic profiles detailing the entire sedimentary sequence within these basins, are presented. Depth structure maps detailing the Outer Hanö Bay area and the deeper parts of the Baltic Basin were also generated. Although the overall structure and stratigraphy of the basins inferred from the reprocessed OPAB dataset are consistent with previous studies, some new observations have been made, which improve the understanding of the tectonic history of these basins and provide insight into how the depositional environments have changed throughout time. The effective CO2 storage potential within structural and stratigraphic traps is assessed for the Cambrian Viklau, När and Faludden sandstone reservoirs. A probabilistic methodology is utilized, which allows a robust assessment of the storage capacity as well as the associated uncertainty. The most favourable storage option in the Swedish sector of the Baltic Basin is assessed to be the Faludden stratigraphic trap, which is estimated to have a mid case (P50) storage capacity of 3390 Mt in the deeper part of the basin, where CO2 can be stored in a supercritical phase.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2016. 85 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1355
Keyword
Baltic Sea, Baltic Basin, Hanö Bay Basin, OPAB dataset, Seismic reflection, CO2 storage capacity, Seismic interpretation, Seismic processing, Vectorising, Digitizing, Tornquist Zone
National Category
Geology Geophysics Geosciences, Multidisciplinary Other Earth and Related Environmental Sciences
Research subject
Geophysics with specialization in Solid Earth Physics
Identifiers
urn:nbn:se:uu:diva-280684 (URN)978-91-554-9515-2 (ISBN)
Public defence
2016-05-13, Hambergsalen, Geocentrum, Villavägen 16, Uppsala, 13:00 (English)
Opponent
Supervisors
Available from: 2016-04-20 Created: 2016-03-14 Last updated: 2016-04-21

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