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Processing and interpretation of vintage 2D marine seismic data from the outer Hano Bay area, Baltic Sea
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.
2013 (English)In: Journal of Applied Geophysics, ISSN 0926-9851, Vol. 95, 1-15 p.Article in journal (Refereed) Published
Abstract [en]

A grid of previously unpublished, vintage 2D marine seismic lines has been processed and interpreted to the east of Hano Bay, SW Baltic Sea. The 3200 km(2) study area lies on the transition between the Hand Bay Basin to the West and Baltic Synelcise to the East, NE of the Tornquist intra shield tectonic zone. Data from the NA79, NA80 and RW84 surveys were selected for this study from the extensive Oljeprospektering AB (OPAB) Baltic Sea dataset. New processing workflows have been developed for the data which focus on suppressing two significant forms of noise, namely multiple and side scattered noise. Deconvolution in the tau-p domain, parabolic radon demultiple and post stack deconvolution are shown to be effective at attenuating multiple noise, while FK filtering in shot and receiver gathers is effective at removing side scattered noise.The newly processed data were interpreted and a series of maps detailing the structure of the basement, Cambrian and Silurian/Paleozoic horizons were constructed. These maps differ significantly to previously published interpretations of the area. Within the study area, a region of significant Late Carboniferous/Early Permian transtensional faulting and Late Cretaceous inversion is mapped in detail. This structure would have exhibited normal offsets of up to 600 m before inversion with later inverted displacements of up to approximately 200 m in places. This feature appears to extend some 20 km to the SW of the study area to the major fault bounding the Christianso High. Based on the seismic interpretation, the area appears to have had a similar overall geological history as the adjacent Tornquist Zone to the SW.

Place, publisher, year, edition, pages
2013. Vol. 95, 1-15 p.
Keyword [en]
Multiple attenuation, Tornquist Zone, Hano Bay, Yoldia Well, Structural inversion, OPAB dataset
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-207024DOI: 10.1016/j.jappgeo.2013.04.011ISI: 000322059200001OAI: oai:DiVA.org:uu-207024DiVA: diva2:647034
Available from: 2013-09-10 Created: 2013-09-09 Last updated: 2016-04-21Bibliographically 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.
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1355
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
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)
Available from: 2016-04-20 Created: 2016-03-14 Last updated: 2016-04-21

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