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  • 1
    Book
    Book
    The geometry of normal faults (1991)
    London : Geological Society
    Details Availability
    Keywords: Strata. Faults ; Aufsatzsammlung ; Störung ; Extension ; Abschiebung ; Geometrie
    Type of Medium: Book
    Pages: VIII, 264 S. , Ill., graph. Darst., Kt
    Edition: 1. publ.
    ISBN: 0903317591
    Series Statement: Special publication / Geological Society 56
    DDC: 551.87
    RVK:
    RB 10121
    Language: English
    Note: Literaturangaben
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  • 2
    Online Resource
    Online Resource
    The Geometry and growth of normal faults (2017)
    London : The Geological Society
    Details Availability
    Keywords: Faults (Geology) ; Aufsatzsammlung ; Störung ; Deformation ; Strukturgeologie ; Verwerfung ; Faltung ; Tektonik ; Rifting ; Störungstektonik ; Rift ; Abschiebung ; Aufsatzsammlung ; Störung ; Deformation ; Strukturgeologie ; Verwerfung ; Faltung ; Tektonik ; Rifting ; Störungstektonik ; Rift ; Abschiebung ; Aufsatzsammlung
    Description / Table of Contents: Normal faults are the primary structures that accommodate extension of the brittle crust. This volume provides an up-to-date overview of current research into the geometry and growth of normal faults. The 23 research papers present the findings of outcrop and subsurface studies of the geometrical evolution of faults from a number of basins worldwide, complemented by analogue and numerical modelling studies of fundamental aspects of fault kinematics. The topics addressed include how fault length changes with displacement, how faults interact with one another, the controls of previous structure on fault evolution and the nature and origin of fault-related folding. This volume will be of interest to those wishing to develop a better understanding of the structural geological aspects of faulting, from postgraduate students to those working in industry
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (vi, 540 Seiten) , Illustrationen, Diagramme, Karten
    Series Statement: Geological Society special publication no. 439
    URL: https://doi.org/10.1144/SP439
    URL: https://sp.lyellcollection.org/content/439/1
    DOI: 10.1144/SP439
    DDC: 551.872
    Language: English
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  • 3
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    Fault-seal analysis for CO2 storage: an example from the Troll area, Norwegian Continental Shelf (2011)
    Geological Society of London
    Details
    Publication Date: 2011-05-01
    Description: Fault seal plays a critical part in hydrocarbon traps, and the same will be true for CO2 storage. The standard workflow for prediction of capillary seal of hydrocarbons can be readily adapted to prediction of CO2 seal since the fluid properties of CO2 at reservoir temperatures and pressures are within the range shown by hydrocarbons. The workflow is applied in a feasibility study into the proposed CO2 storage in the Johansen Formation of the Troll Field. Computation of Shale Gouge Ratio (SGR) over the fault surfaces, in combination with juxtaposition diagrams, was used to estimate the sealing potential of faults cutting the Johansen Formation. SGR values were converted to potential CO2 column heights that might be trapped at each fault. Column heights are generally less than 100 m at each fault, allowing a cross-fault migration route from the Johansen Sand via the Statfjord Formation, Cook Formation and Brent Group. Analysis of in-situ stresses suggests that the faults in the Troll Field are not close to failure and therefore up-dip leakage of CO2 is unlikely. Extremely large CO2 columns (〉300 m) would be required to change this stress stability, and across-fault capillary leakage would occur first.
    Print ISSN: 1354-0793
    Topics: Chemistry and Pharmacology , Geosciences
    Published by Geological Society of London
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  • 4
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    The role of stratigraphic juxtaposition for seal integrity in proven CO2 fault-bound traps of the Southern North Sea (2011)
    Geological Society of London
    Details
    Publication Date: 2011-05-01
    Description: Exploration well 50/26b-6 in the UK Southern North Sea discovered a trap containing a gas-bearing Rotliegend Group (Leman Sandstone Formation) reservoir which was a major surprise at the time of drilling in that its gas composition was approximately 50% CO2 (with 9% N2 and the remainder methane). Christened the Fizzy Discovery', the accumulation was appraised by well 50/26b-8. Subsequently, another CO2-rich discovery (Oak) was made along-strike in nearby block 54/1b. Column heights at the well locations are of the order of a few tens of metres, but at the Fizzy Discovery the column height at the trap crest is estimated to be over 200 m. Interpretation of a high fidelity PSTM 3D seismic dataset has been constrained by 33 exploration wells allowing fault geometries and stratigraphic offsets to be determined with confidence. Despite late-stage (Late Cretaceous) structural inversion, the net boundary-fault offset is sufficient in both the Fizzy and Oak discoveries to almost breach the Zechstein Group evaporite super-seal, and the CO2-bearing Rotliegend Group in the footwall is now juxtaposed against hanging wall sediments of the uppermost Zechstein Group. Hence, these Zechstein Group units evidently act as a robust long-term side-seal for the carbon dioxide column. The Fizzy and Oak accumulations are noteworthy in providing a natural demonstration of top seal and fault side-seal integrity for carbon dioxide in a subsurface reservoir, that has remained intact over a geological timescale in what is otherwise a prolific methane-rich reservoir play fairway.
    Print ISSN: 1354-0793
    Topics: Chemistry and Pharmacology , Geosciences
    Published by Geological Society of London
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  • 5
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    Using probabilistic shale smear modelling to relate SGR predictions of column height to fault-zone heterogeneity (2012)
    Geological Society of London
    Details
    Publication Date: 2012-02-01
    Description: Fault-seal analysis in hydrocarbon exploration often involves prediction of the sealing capacity of fault rock at reservoir–reservoir juxtapositions on subsurface faults. A proxy property, such as Shale Gouge Ratio (SGR), is mapped on to the fault surface, and then SGR is either (a) calibrated by observations of known sealing faults, to define its sealing capacity (empirical approach), or (b) assumed to be equal to the composition of the fault rock, for which a database of capillary threshold pressures is available from cores (deterministic approach). The deterministic approach implicitly assumes that capillary pressures measured on centimetre-scale samples are representative of seismically mappable faults, for example that faults of intermediate SGR are equivalent to phyllosilicate framework fault rocks.This contribution builds on earlier outcrop and modelling work to suggest an alternative explanation for the observed progressive increase in sealing capacity on faults of increasing SGR. Stochastic models of disrupted shale smears display the same pattern of increasing sealing capacity as SGR increases. These models have a bimodal ‘fault rock’ composed only of sealing shale smears and non-sealing matrix and, yet, at intermediate SGR the predicted column heights are similar to those normally ascribed to intermediate composition fault rocks. The resulting ‘fault-seal envelope’ in the models is a statistical estimate of the maximum trappable column height, dependent on the random occurrence of a gap in the smeared fault surface.
    Print ISSN: 1354-0793
    Topics: Chemistry and Pharmacology , Geosciences
    Published by Geological Society of London
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  • 6
    Electronic Resource
    Electronic Resource
    The importance of small-scale faulting in regional extension (1991)
    [s.l.] : Nature Publishing Group
    Nature 351 (1991), S. 391-393 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] To characterize the fault population in a basin, we have assembled measurements of fault displacements at a wide range of scales: regional seismic data, oilfield seismic data and oilfield well cores. Figure la shows cumulative frequency plots of fault displacements on two regional profiles spanning ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/351391a0
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