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  • 1
    Keywords: fractured reservoirs; hydrocarbon resources
    Description / Table of Contents: Advances in the study of naturally fractured hydrocarbon reservoirs: a broad integrated interdisciplinary applied topic / Guy H. Spence, Gary D. Couples, Tim G. Bevan, Roberto Aguilera, John W. Cosgrove, Jean-Marc Daniel and Jonathan Redfern / Geological Society, London, Special Publications, 374, 1-22, 9 July 2014, https://doi.org/10.1144/SP374.19 --- Investigating fracture networks using outcrop, core and geophysical data --- Sedimentological controls on the fracture distribution and network development in Mesaverde Group sandstone lithofacies, Uinta Basin, Utah, USA / Ryan Sonntag, James P. Evans, Paul La Pointe, Meagan Deraps, Hope Sisley and David Richey / Geological Society, London, Special Publications, 374, 23-50, 10 September 2012, https://doi.org/10.1144/SP374.4 --- Comparison of digital outcrop and conventional data collection approaches for the characterization of naturally fractured reservoir analogues / Thomas D. Seers and David Hodgetts / Geological Society, London, Special Publications, 374, 51-77, 19 April 2013, https://doi.org/10.1144/SP374.13 --- Fault linkage and damage zone architecture in tight carbonate rocks in the Suez Rift (Egypt): implications for permeability structure along segmented normal faults / A. Rotevatn and E. Bastesen / Geological Society, London, Special Publications, 374, 79-95, 10 September 2012, https://doi.org/10.1144/SP374.12 --- Quantifying fracture density and connectivity of fractured chalk reservoirs from core samples: implications for fluid flow / D. A. Sagi, M. Arnhild and J. F. Karlo / Geological Society, London, Special Publications, 374, 97-111, 26 June 2013, https://doi.org/10.1144/SP374.16 --- Characterizing discontinuities in naturally fractured outcrop analogues and rock core: the need to consider fracture development over geological time / S. R. Hencher / Geological Society, London, Special Publications, 374, 113-123, 9 May 2013, https://doi.org/10.1144/SP374.15 --- Numerical and statistical simulations and models --- What can we learn from high-resolution numerical simulations of single- and multi-phase fluid flow in fractured outcrop analogues? / Sebastian Geiger and Stephan Matthäi / Geological Society, London, Special Publications, 374, 125-144, 5 September 2012, https://doi.org/10.1144/SP374.8 --- Geomechanical impacts on flow in fractured reservoirs / Gary D. Couples / Geological Society, London, Special Publications, 374, 145-172, 25 June 2013, https://doi.org/10.1144/SP374.17 --- Geomechanical mechanisms involving faults and fractures for observed correlations between fluctuations in flowrates at wells in North Sea oilfields / Kes J. Heffer / Geological Society, London, Special Publications, 374, 173-186, 28 August 2012, https://doi.org/10.1144/SP374.2 --- Fluid flow through porous sandstone with overprinting and intersecting geological structures of various types / Xiaoxian Zhou, Mohammad Karimi-Fard, Louis J. Durlofsky and Atilla Aydin / Geological Society, London, Special Publications, 374, 187-209, 14 March 2013, https://doi.org/10.1144/SP374.11 --- Influences of nodular chert rhythmites on natural fracture networks in carbonates: an outcrop and two-dimensional discrete element modelling study / Guy H. Spence and Emma Finch / Geological Society, London, Special Publications, 374, 211-249, 7 March 2014, https://doi.org/10.1144/SP374.18 --- Sills as fractured hydrocarbon reservoirs: examples and models / Agust Gudmundsson and Ingrid F. Løtveit / Geological Society, London, Special Publications, 374, 251-271, 10 September 2012, https://doi.org/10.1144/SP374.5 --- A methodology to characterize fractured reservoirs constrained by statistical geological analysis and production: a real field case study / Matthieu Delorme, Rosane Oliveira Mota, Nina Khvoenkova, André Fourno and Benoit Nœtinger / Geological Society, London, Special Publications, 374, 273-288, 29 July 2013, https://doi.org/10.1144/SP374.14 --- Case studies --- Characterization of highly fractured basement, Say'un Masila Basin, Yemen / Ann Murray and David W. Montgomery / Geological Society, London, Special Publications, 374, 289-310, 27 July 2012, https://doi.org/10.1144/SP374.1 --- Characterizing seismic-scale faults pre- and post-drilling; Lewisian Basement, West of Shetlands, UK / Clare Slightam / Geological Society, London, Special Publications, 374, 311-331, 11 September 2012, https://doi.org/10.1144/SP374.6 --- Integration of outcrop and subsurface data during the development of a naturally fractured Eocene carbonate reservoir at the East Ras Budran concession, Gulf of Suez, Egypt / William Bosworth, Samir Khalil, Alan Clare, Joe Comisky, Hany Abdelal, Tom Reed and George Kokkoros / Geological Society, London, Special Publications, 374, 333-360, 31 July 2012, https://doi.org/10.1144/SP374.3 --- The Machar Oil Field, UK Central North Sea: impact of seismic reprocessing on the development of a complex fractured chalk field / M. V. Ward, C. Pearse, Y. Jehanno, M. O'Hanlon, A. Zett and D. Houliston / Geological Society, London, Special Publications, 374, 361-377, 17 October 2012, https://doi.org/10.1144/SP374.10 --- Dual-porosity fractured Miocene syn-rift dolomite reservoir in the Issaran Field (Gulf of Suez, Egypt): a case history of the zonal isolation of highly fractured water carrier bed / Ati Saoudi, Adel R. Moustafa, Ramadan I. Farag, Maher M. Omara, Hossam Wally, Ahmed Fouad, Amr Tag and Ramy Z. Ragab / Geological Society, London, Special Publications, 374, 379-394, 5 September 2012, https://doi.org/10.1144/SP374.7 --- The importance of natural fractures in a tight reservoir for potential CO2 storage: a case study of the upper Triassic–middle Jurassic Kapp Toscana Group (Spitsbergen, Arctic Norway) / K. Ogata, K. Senger, A. Braathen, J. Tveranger and S. Olaussen / Geological Society, London, Special Publications, 374, 395-415, 10 September 2012, https://doi.org/10.1144/SP374.9
    Pages: Online-Ressource (VI, 425 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 9781862396609
    Language: English
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  • 2
    Description / Table of Contents: The many kinds of porous geomaterials (rocks, soils, concrete, etc.) exhibit a range of responses when undergoing inelastic deformation. In doing so they commonly develop well-ordered fabric elements, forming fractures, shear bands and compaction bands, so creating the planar fabrics that are regarded as localization. Because these induced localization fabrics alter the bulk material properties (such as permeability, acoustic characteristics and strength), it is important to understand how and why localization occurs, and how it relates to its setting. The concept of damage (in several uses) describes both the precursor to localization and the context within which it occurs. A key theme is that geomaterials display a strong material evolution during deformation, revealing a close linkage between the damage and localization processes. This volume assembles perspectives from a number of disciplines, including soil mechanics, rock mechanics, structural geology, seismic anisotropy and reservoir engineering. The papers range from theoretical to observational, and include contributions showing how the deformed geomaterials emergent bulk characteristics, like permeability and seismic anisotropy, can be predicted. This book will be of interest to a wide range of geoscientists and engineers who deal with characterization of deformed materials.
    Pages: Online-Ressource (247 Seiten)
    ISBN: 9781862392366
    Language: English
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  • 3
    Publication Date: 2007-11-05
    Description: An elasticplastic material model, with strain-hardening or -softening, and volumetric strains, implemented within a general-purpose finite-element system (SAVFEMTM), is shown to reproduce the stressstrain relationships and localized to de-localized (brittle to ductile) changes in strain response that have long been observed in typical laboratory experiments on common porous rocks. Based on that validation of the implementation, SAVFEMTM is then used to create numerical simulations that reproduce the patterns of localized shear zones, and their growth history, that occur in experimental (physical) models of foldfault systems in layered rocks. These simulations involve a progressive evolution of the mechanical state, illustrating a geometrically dominated type of localization behaviour. Part of the deformation simulated here represents a crestal graben system. Analysis of the evolving mechanical state in the system of simulated faults poses challenges to some longstanding ideas concerning the way that faults operate, suggesting the need for a new fault-process paradigm.
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  • 4
    Publication Date: 2007-11-05
    Description: Simulation of coupled dynamic fluid flow and geomechanical loading of fractured systems shows that complex behaviours can result, even for geometrically simple fracture systems and simple loading. Using a bi-directionally coupled simulation tool, HYDRODDA, we examine how fluids and discontinuum processes interact in a fractured, porous rock layer that is being flexed. The changes in fracture aperture, and hence the equivalent permeabilities of this system, exhibit marked localization or delocalization responses in spite of the geometrical and mechanical simplicity of this model. Typically the linked flow-deformation behaviour develops markedly non-linear responses. In some cases the permeability varies by more than three orders of magnitude for minor changes in input variables. Upscaling methods that are suitable representations of this permeability variation are developed. These non-linear behaviours develop in a porous material, which would be expected to suppress non-linear effects. If the range of behaviours seen in this geometrically simple coupled system is typical of other, potentially more complex, fully coupled systems, then the results obtained here can be used to explain the spatially and temporally high variability of the permeability characteristics of fractured systems.
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  • 5
    Publication Date: 2008-01-02
    Description: Geomechanical simulations are used to demonstrate the importance of the way that models are loaded. In this paper the development of permanent damage during faulting using frictional-slip models of a reverse fault is investigated. Although the use of different loads and constraints can produce the same faulted geometry (for the same rock type, and at the same burial depth), the models develop very different stress and strain states. Permanent strain magnitudes and distributions between models are quite dissimilar, including the distributions of permanent dilation and compaction. This work demonstrates that boundary loads and boundary constraints are significant factors in determining what stress and deformation states evolve in the simulation model. The examples also illustrate that final (deformed) geometry alone is a very poor basis from which to predict either stress state or open fracture distribution. Bulk finite strain does not allow a prediction of local principal stress directions, magnitudes, or signs, at least in the vicinity of fault damage zones.
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  • 6
    Publication Date: 2008-01-02
    Description: Natural fault damage zones (FDZs) are characterized by complex geometries and topologies, and by strongly-contrasting material properties. Accurate simulation of fluid flow in such systems is dependent on the method of discretization and the mathematical representation of the flow. In this paper, we focus on the conceptual and methodological issues that link a model of a heterogeneous system and its flow response. We study FDZs as our example, where each thin fault strand is a barrier to flow. We examine two contrasting discretization schemes and apply them to 2D FDZ models that contain a realistic array of linear fault traces. Both schemes produce results that are generally in good agreement, and agree with the results calculated by a more accurate (but computationally less efficient) reference scheme. However, differences occur when the discretization approach fails to maintain the fault connectivity (topology) of the input model. It is important to guide the modelling by identifying any continuous flow pathways in the matrix linking fluid inlets and outlets (Through-Going Regions, TGRs). We illustrate a new scheme that identifies all TGRs and determines a grid that is just fine enough to resolve them.
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  • 7
    Publication Date: 2014-07-11
    Description: Naturally fractured reservoirs, within which porosity, permeability pathways and/or impermeable barriers formed by the fracture network interact with those of the host rock matrix to influence fluid flow and storage, can occur in sedimentary, igneous and metamorphic rocks. These reservoirs constitute a substantial percentage of remaining hydrocarbon resources; they create exploration targets in otherwise impermeable rocks, including under-explored crystalline basement, and they can be used as geological stores for anthropogenic carbon dioxide. Their complex fluid flow behaviour during production has traditionally proved difficult to predict, causing a large degree of uncertainty in reservoir development. The applied study of naturally fractured reservoirs seeks to constrain this uncertainty and maximize production by developing new understanding, and is necessarily a broad, integrated, interdisciplinary topic. Some of the methods, challenges and advances in characterizing the interplay of rock matrix and fracture networks relevant to fluid flow and hydrocarbon recovery are reviewed and discussed via the contributions in this volume.
    Print ISSN: 0305-8719
    Electronic ISSN: 2041-4927
    Topics: Geosciences
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  • 8
    Publication Date: 2011-06-24
    Print ISSN: 0169-3913
    Electronic ISSN: 1573-1634
    Topics: Geosciences , Technology
    Published by Springer
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  • 9
    Publication Date: 1998-01-01
    Print ISSN: 0305-8719
    Electronic ISSN: 2041-4927
    Topics: Geosciences
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  • 10
    Publication Date: 1998-01-01
    Print ISSN: 0305-8719
    Electronic ISSN: 2041-4927
    Topics: Geosciences
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