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  • 1
    Call number: S 97.0506(593-8)
    In: Tight gas reservoirs - natural gas for the future
    Description / Table of Contents: An integrated study was performed with the objective to improve reservoir quality prediction from 3D seismics, geological data and concepts. Seismic facies classes, derived from Neural Network analysis, correlate with reservoir characteristics. They can be used for predictive exploration purposes. Deformation zones indicate the extent of extensional fractures, which can have positive or negative effects on reservoir characteristics, depending on the diagenetic facies. The diagenetic conceptional model has been substantiated, verified in essential parts, and extended (inversion of reservoir qualities), based on well data, modelling and seismic analysis. Petroleum System Modelling added the time frame for diverse relevant processes and enabled to evaluate their effects on hydrocarbon migration. The importance of pre-oil hydrocarbon migration and spatial distance to Carboniferous source rocks for Rotliegend reservoir characteristics must be stressed.
    Type of Medium: Series available for loan
    Pages: Getr. Zählung
    Edition: Als Ms. gedr.
    ISBN: 3936418314
    Series Statement: DGMK-Forschungsbericht 593-8
    Classification: A.3.7.
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
    ISSN: 1437-3262
    Keywords: Central Europe Northeast German Basin Salt pillows Compression Late Permian
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract. The northern part of the Northeast German Basin contains a large number of Late Permian (Zechstein) salt pillows, whereas diapiric structures are almost completely absent. This lack of diapirs facilitated the study of early stages of salt movement in the basin. Salt pillows and related structures were investigated in terms of distribution, geometry and time of initiation of salt flow within the regional geological context. The primary Zechstein thickness in the study area was reconstructed to gain more insight into the relationship between the geometry of the salt layer and the style of the salt-related structures. In this study, no clear spatial relationship between the salt structures and basement faults has been found and the location of the salt structures in this area appears to be highly independent of the underlying structural grain. The overburden is affected by minor faulting. We propose that buckling of the overburden due to regional compression significantly contributed to the initiation of the Late Jurassic to Early Cretaceous salt structures in the basin. Reverse faulting of the Gardelegen and Haldensleben Faults is related to inversion tectonics and exerted a compression on the basin fill. During the deformation, the Late Permian salt layer acted as an efficient detachment and led to a marked decoupling of the Mesozoic overburden from the underlying pre-Zechstein rocks.
    Type of Medium: Electronic Resource
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  • 3
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    GEOMAR Forschungszentrum für marine Geowissenschaften
    In:  (Doctoral thesis/PhD), Christian-Albrechts-Universität, Kiel, 142 pp . GEOMAR-Report, 037 . DOI 10.3289/geomar_rep_37_1995 〈http://dx.doi.org/10.3289/geomar_rep_37_1995〉.
    Publication Date: 2015-02-11
    Type: Thesis , NonPeerReviewed
    Format: text
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  • 4
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    In:  [Talk] In: 4. International Conference on Paleoceanography (ICP IV), 21.09.-25.09.1992, Kiel .
    Publication Date: 2014-05-26
    Type: Conference or Workshop Item , NonPeerReviewed
    Format: text
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  • 5
    Publication Date: 2018-07-03
    Description: Abstract
    Description: Imaging the internal structure of faults remains challenging using conventional seismome-ters. Here, the authors use deployed fibre-optic cables to obtain strain data and identify faults and volcanic dykes in Iceland. Such fibre-optic networks are pervasive for telecommu-nication and could be used for hazard assessment.Natural hazard prediction and efficient crustal exploration requires dense seismic observa-tions both in time and space. Seismological techniques provide ground-motion data, whose accuracy depends on sensor characteristics and spatial distribution. In the manuscript Jousset et al. (2018), we demonstrate that strain determination is possible with conventional fibre-optic cables deployed for telecommunication. Extending recently distributed acoustic sensing (DAS) studies, we present high resolution spatially un-aliased broadband strain data.We recorded seismic signals from natural and man-made sources with 4-m spacing along a 15-km-long fibre-optic cable layout on Reykjanes Peninsula, SW Iceland.This data publication contains data used for plotting several figures of Jousset et al. (2018). For further explanation of the data and related processing steps, please refer to Jousset et al. (2018). A theoretical study with respect to the coupling of the cable to the ground has been published by Reinsch et al. (2017).
    Keywords: fibre optic cables ; seismic exploration ; Iceland ; natural hazards
    Type: Dataset
    Format: 77751637 Bytes
    Format: 2 Files
    Format: application/pdf
    Format: text/csv
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  • 6
    Publication Date: 2017-06-10
    Description: The Lower Saxony Basin (LSB) is a part of the post-Variscan Central European Basin System. We used a 3-D reflection seismic dataset in the northern LSB, provided by RWE-DEA AG, Hamburg (c.f. Lohr et al. submitted) for our investigation, which is concerned with the detailed structural and kinematic analysis of a flower structure within Mesozoic strata. This data is used in turn to determine input parameters for further 3-D geometrical retro-deformation. The retro-deformation verifies our assumptions about the structure and tectonic processes, and gives further information about sub-seismic strain distribution with respect to the branch faults of the flower structure.
    Description: conference
    Keywords: TQC 220 ; TSB 000 ; VAE 820 ; VAE 830 ; VEB 110 ; VAE 120 ; VBE 000 ; Reflexionsseismik {Geophysik} ; Mitteleuropa {Geophysik} ; Sedimentationsbecken als Erdkrustentypen {Geologie} ; Bruchschollenstrukturen {Geologie} ; Norddeutsche Senke {Geologie} ; Methodik {Strukturgeologie} ; Modellierung von Prozessen in der Geosphäre ; Niedersächsiches Becken ; Dreidimensionale Seismik ; Strukturgeologie ; Modell
    Language: German
    Type: anthologyArticle , publishedVersion
    Format: application/pdf
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  • 7
    Publication Date: 2017-06-10
    Description: Movement on fault planes causes a large amount of smaller-scale deformation, ductile or brittle, in the area surrounding the fault. Much of this deformation is below the resolution of reflection seismics (i.e. sub-seismic, 〈10m displacement), but it is important to determine this deformation, since it can make up a large portion of the total bulk strain, for instance in a developing sedimentary basin. Calculation of the amount of sub-seismic strain around a fault by 3-D geometrical kinematic retro-deformation can also be used to predict the orientation and magnitude of these smaller-scale structures. However, firstly a 3-D model of the fault and its faulted horizons must be constructed at a high enough resolution to be able to preserve fault and horizon morphology with a grid spacing of less than 10 m. Secondly, the kinematics of the fault need to be determined, and thirdly a suitable deformation algorithm chosen to fit the deformation style. Then by restoring the faulted horizons to their pre-deformation state (a ‘regional’), the moved horizons can be interrogated as to the strain they underwent. Since strain is commutative, the deformation demonstrated during this retro-deformation is equivalent to that during the natural, forward deformation...
    Description: conference
    Keywords: TQC 220 ; TSB 000 ; VAE 200 ; VAE 400 ; VBE 000 ; Reflexionsseismik {Geophysik} ; Mitteleuropa {Geophysik} ; Geodynamik der Lithosphäre {Geologie} ; Tektogenese {Geologie} ; Modellierung von Prozessen in der Geosphäre ; Niedersächsiches Becken ; Dreidimensionale Seismik ; Störung 〈Geologie〉 ; Kinematik ; Modell
    Language: German
    Type: anthologyArticle , publishedVersion
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  • 8
    Publication Date: 2008-04-01
    Description: In addition to seismically mapped fault structures, a large number of faults below the limit of seismic resolution contribute to subsurface deformation. However, a correlation between large- and small-scale faults is difficult because of their strong variation in orientation. A workflow to analyze deformation over different scales is described here. Based on the combination of seismic interpretation, coherency analysis, geostatistical analysis, kinematic modeling, and well data analysis, we constrained the density and orientation of subseismic faults and made predictions about reactivation and opening of fractures. We interpreted faults in seismic and coherency volumes at scales between several kilometers and a few tens of meters. Three-dimensional (3-D) retrodeformation was performed on a detailed interpreted 3-D structural model to simulate strain in the hanging wall at the time of faulting, at a scale below seismic resolution. The modeling results show that (1) considerable strain is observed more than 1 km (0.62 mi) away from the fault trace and (2) deformation around the fault causes strain variations, depending on the fault morphology. This strain variation is responsible for the heterogeneous subseismic fracture distribution observed in wells. We linked the fracture density from the well data with the modeled strain magnitude and used the strain magnitude as a proxy for fracture density. With this method, we can predict the relative density of small-scale fractures in areas without well data. Furthermore, knowing the orientation of the local strain axis, we predict a fault strike and opening or reactivation of fractures during a particular deformation event. Tina Lohr graduated in geology at Freiberg University, Germany. She is currently completing her Ph.D. at the GeoForschungsZentrum (GFZ) Potsdam. As a Marie-Curie fellow, she joined the Fault Dynamics Research Group at the Royal Holloway University of London for 5 months. Her research is focused on seismic interpretation, fault analysis, and structural restoration and modeling. Charlotte Krawczyk is now at the Leibniz Institute for Applied Geosciences and is a professor for geophysics, with focus on seismics at Technical University Berlin. From 1995 to 2007, she was a senior scientist at GFZ Potsdam. She did her Ph.D. at GEOMAR, Research Center for Marine Geosciences, Kiel, and received her diploma in geophysics from Kiel University. David Tanner earned his B.Sc. degree at Liverpool University (1988), his M.Sc. degree at Imperial College, London (1989), and his Ph.D. at Giessen University, Germany (1995). His main research interest is three-dimensional structural and geometrical modeling of seismic and outcrop data at all scales. Ramin Samiee received his M.S. degree in geology at Heidelberg University and his Ph.D. at Erlangen University (1998) in Germany. His interests are facies and diagenesis of carbonates and siliciclastics, log analysis, and seismic interpretation. He worked as a consultant for Shell, PanTerra, BEB, and Trappe Erdoel Erdgas Consultant (TEEC) and is now at RWE Dea AG. Heike Endres received her diploma in geophysics in 1995 from Muenster University, Germany. She worked as a geophysicist for Western-Geco and TEEC. For this project, she was part of the working group of RWTH Aachen University. Peter Thierer received his diploma in geology from Kiel University, Germany, in 2001. He worked as a research associate at GEOMAR Research Center for Marine Geosciences, and, since 2006, for TEEC. Onno Oncken received his diploma and Ph.D. at Cologne University, followed by postdoctoral research at Muenster and Frankfurt Universities, and a professorship for structural geology at Wuerzburg University. In 1992, he joined the GFZ in Potsdam. He is the director of the Geodynamics Department and holds a faculty position at Free University Berlin. Henning Trappe received his Ph.D. from Kiel University, Germany, in 1986. He worked at BEB from 1986 to 1992 as a geophysicist. Since 1992, he is the head of the self-founded TEEC and TEECware. Raik Bachmann received his diploma in geology from Freiberg University, Germany. Presently, he is finishing his Ph.D. at GFZ Potsdam and Free University Berlin. His work focuses on exhumed convergent plate boundaries and fossil seismicity. Peter Kukla graduated in geology from Wuerzburg University, Germany, and received his Ph.D. from Witwatersrand University, South Africa. His professional career included positions at Witwatersrand University (1986–1990), Shell International Exploration and Production (1991–2000), and RWTH Aachen University (since 2000) as a full professor of geology, head of the department, and director of the Geological Institute, with research focus on petroleum reservoir geology.
    Print ISSN: 0149-1423
    Electronic ISSN: 1943-2674
    Topics: Geosciences
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  • 9
    Publication Date: 2000-12-01
    Description: The northern part of the Northeast German Basin contains a large number of Late Permian (Zechstein) salt pillows, whereas diapiric structures are almost completely absent. This lack of diapirs facilitated the study of early stages of salt movement in the basin. Salt pillows and related structures were investigated in terms of distribution, geometry and time of initiation of salt flow within the regional geological context. The primary Zechstein thickness in the study area was reconstructed to gain more insight into the relationship between the geometry of the salt layer and the style of the salt-related structures. In this study, no clear spatial relationship between the salt structures and basement faults has been found and the location of the salt structures in this area appears to be highly independent of the underlying structural grain. The overburden is affected by minor faulting. We propose that buckling of the overburden due to regional compression significantly contributed to the initiation of the Late Jurassic to Early Cretaceous salt structures in the basin. Reverse faulting of the Gardelegen and Haldensleben Faults is related to inversion tectonics and exerted a compression on the basin fill. During the deformation, the Late Permian salt layer acted as an efficient detachment and led to a marked decoupling of the Mesozoic overburden from the underlying pre-Zechstein rocks. ©2000 Springer-Verlag
    Print ISSN: 1437-3254
    Electronic ISSN: 1437-3262
    Topics: Geosciences
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  • 10
    Publication Date: 2016-10-02
    Print ISSN: 1860-1804
    Topics: Geography , Geosciences
    Published by Schweizerbart
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