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  • 1
    Call number: 9/M 07.0421(370) ; https://doi.org/10.1144/SP370
    In: Geological Society special publication
    Description / Table of Contents: Carbonate reservoirs contain an increasingly important percentage of the world's hydrocarbon reserves. This volume presents key recent advances in carbonate exploration and reservoir analysis. As well as a comprehensive overview of the trends in carbonate over the years.
    Type of Medium: Monograph available for loan
    Pages: 311 S., Ill, graph. darst.
    ISBN: 9781862393509
    Series Statement: Geological Society special publication 370
    Classification:
    Deposits
    Location: Reading room
    Branch Library: GFZ Library
    Branch Library: GFZ Library
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  • 2
    Keywords: carbonate reservoirs; reservoir analysis
    Description / Table of Contents: Advances in carbonate exploration and reservoir analysis / J. Garland, J. Neilson, S. E. Laubach and K. J. Whidden / Geological Society, London, Special Publications, 370, 1-15, 30 October 2012, https://doi.org/10.1144/SP370.15 --- Carbonate rocks and petroleum reservoirs: a geological perspective from the industry / Trevor P. Burchette / Geological Society, London, Special Publications, 370, 17-37, 19 October 2012, https://doi.org/10.1144/SP370.14 --- Lacustrine carbonates in rift settings: the interaction of volcanic and microbial processes on carbonate deposition / V. Paul Wright / Geological Society, London, Special Publications, 370, 39-47, 26 June 2012, https://doi.org/10.1144/SP370.2 --- The Grosmont: the world's largest unconventional oil reservoir hosted in carbonate rocks / Hans G. Machel, Mary Luz Borrero, Eugene Dembicki, Harald Huebscher, Luo Ping and Yi Zhao / Geological Society, London, Special Publications, 370, 49-81, 21 September 2012, https://doi.org/10.1144/SP370.11 --- Reservoir characteristics of fault-controlled hydrothermal dolomite bodies: Ramales Platform case study / J. Dewit, M. Huysmans, Ph. Muchez, D. W. Hunt, J. B. Thurmond, J. Verges, E. Saura, N. Fernandez, I. Romaire, P. Esestime and R. Swennen / Geological Society, London, Special Publications, 370, 83-109, 26 June 2012, https://doi.org/10.1144/SP370.1 --- Reservoir properties and petrophysical modelling of carbonate sand bodies: outcrop analogue study in an epicontinental basin (Triassic, Germany) / Denis Palermo, Thomas Aigner, Bjoern Seyfang and Sergio Nardon / Geological Society, London, Special Publications, 370, 111-138, 26 June 2012, https://doi.org/10.1144/SP370.6 --- Reservoir characterization of an intra-orogenic Carbonates platform: Pila Spi Formation, Taq Taq oil field, Kurdistan, Iraq / Basim Al-Qayim and Divan Othman / Geological Society, London, Special Publications, 370, 139-168, 26 June 2012, https://doi.org/10.1144/SP370.7 --- Mechanical stratigraphy and (palaeo-) karstification of the Murge area (Apulia, southern Italy) / Carl Jacquemyn, Rudy Swennen and Paola Ronchi / Geological Society, London, Special Publications, 370, 169-186, 26 June 2012, https://doi.org/10.1144/SP370.4 --- Effects of diagenesis (cement precipitation) during fracture opening on fracture aperture-size scaling in carbonate rocks / J. N. Hooker, L. A. Gomez, S. E. Laubach, J. F. W. Gale and R. Marrett / Geological Society, London, Special Publications, 370, 187-206, 26 June 2012, https://doi.org/10.1144/SP370.9 --- Interplay between fracturing and hydrothermal fluid flow in the Asón Valley hydrothermal dolomites (Basque–Cantabrian Basin, Spain) / E. Iriarte, M. A. López-Horgue, S. Schroeder and B. Caline / Geological Society, London, Special Publications, 370, 207-227, 5 September 2012, https://doi.org/10.1144/SP370.10 --- Geomodelling of carbonate mounds using two-point and multipoint statistics / Xavier Janson and Darrin D. Madriz / Geological Society, London, Special Publications, 370, 229-246, 26 June 2012, https://doi.org/10.1144/SP370.5 --- Characterization of karstic networks by automatic extraction of geometrical and topological parameters: comparison between observations and stochastic simulations / A. Fournillon, S. Abelard, S. Viseur, B. Arfib and J. Borgomano / Geological Society, London, Special Publications, 370, 247-264, 26 June 2012, https://doi.org/10.1144/SP370.8 --- Relevance of the stochastic stratigraphic well correlation approach for the study of complex carbonate settings: application to the Malampaya buildup (Offshore Palawan, Philippines) / Florent Lallier, Guillaume Caumon, Jean Borgomano, Sophie Viseur, Francois Fournier, Christophe Antoine and Théophile Gentilhomme / Geological Society, London, Special Publications, 370, 265-275, 5 September 2012, https://doi.org/10.1144/SP370.12 --- A new workflow for carbonate reservoir modelling based on MPS: shoal bodies in outcrop analogues (Triassic, SW Germany) / Andre Jung, Thomas Aigner, Denis Palermo, Sergio Nardon and Marco Pontiggia / Geological Society, London, Special Publications, 370, 277-293, 17 September 2012, https://doi.org/10.1144/SP370.13 --- An algorithm for 3D simulation of branchwork karst networks using Horton parameters and A★ Application to a synthetic case / Pauline Collon-Drouaillet, Vincent Henrion and Jeanne Pellerin / Geological Society, London, Special Publications, 370, 295-306, 26 June 2012, https://doi.org/10.1144/SP370.3
    Pages: Online-Ressource (311 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 9781862396180
    Language: English
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  • 3
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    In:  Geological Society Special Publication 231: 1-9.
    Publication Date: 2007-10-08
    Description: High-resolution scanning electron microscope (SEM)-based cathodoluminescence images were used to reconstruct incremental fracture opening in regional opening-mode fractures in sandstone. Opening is recorded by crack-seal texture in isolated mineral bridges that span opening-mode fractures formed in sandstone at moderate-great depth (c. 1000-6000 m). We restored opening histories of nine representative fractures with apertures of millimetres in five sandstones from five sedimentary basins. Gaps created by fracture widening in 11 bridges range from less than 1 {micro}m to more than 1 mm, but nearly all are less than 20 {micro}m and most are less than 5 {micro}m. These are the opening amounts that could be spanned by cement growth in these diagenetic environments. Our observations are the first evidence of opening amounts from mostly porous, opening-mode (joint-like) fractures formed in diagenetic environments. Patterns are consistent with a new structural diagenetic model of bridge growth that can use opening patterns to indicate rate of fracture opening as a function of time.
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  • 4
    Publication Date: 2012-11-29
    Description: A correlation is demonstrated between the presence of crack-seal texture and power-law kinematic aperture-size (width) distributions among opening-mode fractures in rocks of dominantly carbonate mineralogy. Crack-seal opening increments (opening-displacement increment sizes or ‘gaps’) within individual fractures follow narrow normal or log-normal size distributions, suggesting that fracture widening accumulates in characteristic (usually micrometre-scale) size increments. The scale invariance in overall fracture width distributions present in some fracture sets most likely arises from grouping of these increments (localization) to form larger fractures (millimetre- to centimetre-scale widths). Such localization could be a consequence of the tendency for larger, less cemented fractures to break preferentially during subsequent deformation. Cement accumulation patterns thus provide a mechanism for positive feedback whereby large-fracture growth exceeds small-fracture growth. Using characteristically sized growth increments, a fracture growth model accurately simulates fracture arrays having power-law fracture-width distributions. Model parameters can be altered to produce characteristic-width fracture size distributions. The results have implications for how fracture porosity and permeability evolve in carbonate reservoirs.
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  • 5
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    In:  Geological Society Special Publication 370: 1-15.
    Publication Date: 2012-11-29
    Description: The development of innovative techniques and concepts, and the emergence of new plays in carbonate rocks are creating a resurgence of oil and gas discoveries worldwide. The maturity of a basin and the application of exploration concepts have a fundamental influence on exploration strategies. Exploration success often occurs in underexplored basins by applying existing established geological concepts. This approach is commonly undertaken when new basins ‘open up’ owing to previous political upheavals. The strategy of using new techniques in a proven mature area is particularly appropriate when dealing with unconventional resources (heavy oil, bitumen, stranded gas), while the application of new play concepts (such as lacustrine carbonates) to new areas (i.e. ultra-deep South Atlantic basins) epitomizes frontier exploration.Many low-matrix-porosity hydrocarbon reservoirs are productive because permeability is controlled by fractures and faults. Understanding basic fracture properties is critical in reducing geological risk and therefore reducing well costs and increasing well recovery. The advent of resource plays in carbonate rocks, and the long-standing recognition of naturally fractured carbonate reservoirs means that new fracture and fault analysis and prediction techniques and concepts are essential.A key area of progress has been integration of stratigraphic, structural, geomechanical and diagenetic analysis to populate reservoir models accurately. Dramatic increases in computing and digital imaging capabilities are being harnessed to improve spatial analysis and spatial statistics in reservoirs and ultimately improve 3D geocellular models.
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  • 6
    Publication Date: 2015-06-24
    Description: Crack-seal texture within fracture cements in the Triassic El Alamar Formation, NE Mexico, shows that the fractures opened during precipitation of quartz cements; later, overlapping calcite cements further occluded pore space. Previous workers defined four systematic fracture sets, A (oldest) to D (youngest), with relative timing constrained by crosscutting relationships. Quartz fluid inclusion homogenization temperatures are higher within Set B (148 ± 20°C) than in Set C (105 ± 12°C). These data and previous burial history modelling are consistent with Set C forming during exhumation. Fluid inclusions in Set C quartz have higher salinity than those in Set B (22.9 v. 14.2 wt% NaCl equivalent, respectively), and Set C quartz cement is more enriched in 18 O (20.2 v. 18.7 VSMOW). Under most assumptions about the true temperature during fracture opening, the burial duration, the amount of cement precipitated and fluid-flow patterns, it appears that the fracture fluid became depleted in 18 O and enriched in 13 C. This isotopic evolution, combined with increasing salinity, suggests that throughout fracture opening there was a gravity-driven influx of fluid from upsection Jurassic evaporites, which form a regional décollement. Fracture opening amid downward fluid motion suggests that fracturing was driven by external stresses such as tectonic stretching or unloading, rather than increases in fluid pressure.
    Print ISSN: 0016-7649
    Topics: Geosciences
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  • 7
    Publication Date: 2012-05-01
    Description: The Late Proterozoic Torridon Group Applecross Formation in the foreland of the Moine Thrust Belt, NW Scotland, contains deformation bands, three fracture sets (from oldest to youngest A, B, and L) defined by orientation, crosscutting relations, and progressively less quartz cement in younger sets, and joints. Set A crosscuts deformation bands and strikes north–south. Set B has trimodal orientation defining three linked subsets that formed concurrently. Set L strike ranges from NE–SW to ENE–WSW, in parent crack–wing crack arrays that formed progressively; these are more abundant near small-displacement, oblique-slip faults that offset the overlying Cambrian Eriboll Formation and the Moine Thrust Belt. Applecross sandstones have low fracture abundance, possibly a consequence of low elastic moduli (Young’s modulus 2.3–17.0 GPa, most values
    Print ISSN: 0016-7649
    Topics: Geosciences
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  • 8
    Publication Date: 2012-05-12
    Description: The Late Proterozoic Torridon Group Applecross Formation in the foreland of the Moine Thrust Belt, NW Scotland, contains deformation bands, three fracture sets (from oldest to youngest A, B, and L) defined by orientation, crosscutting relations, and progressively less quartz cement in younger sets, and joints. Set A crosscuts deformation bands and strikes north–south. Set B has trimodal orientation defining three linked subsets that formed concurrently. Set L strike ranges from NE–SW to ENE–WSW, in parent crack–wing crack arrays that formed progressively; these are more abundant near small-displacement, oblique-slip faults that offset the overlying Cambrian Eriboll Formation and the Moine Thrust Belt. Applecross sandstones have low fracture abundance, possibly a consequence of low elastic moduli (Young’s modulus 2.3–17.0 GPa, most values 〈6.9 GPa) and moderate to high subcritical crack index (45–78), resulting from compacted soft lithic grains and clay-mineral cements. Low abundance contradicts models that postulate persistent incipient failure by subsurface fracture. The fracture sequence resembles that found in the overlying Cambrian Eriboll Formation quartzarenites, implying that no widespread late Proterozoic fracture sets exist in this part of the Applecross Formation, an uneventful record for a rock profoundly resistant to brittle deformation.
    Print ISSN: 0016-7649
    Topics: Geosciences
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  • 9
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    Society of Exploration Geophysicists (SEG)
    Publication Date: 2014-10-07
    Description: T he rate of success in shale plays for oil and gas depends strongly on finding the sweet spots, particularly with regard to total organic carbon (TOC) and maturation. However, just as important is determining where the wellbore and the hydraulic fractures are placed during drilling and completion. The articles in this special section treat the topic of detecting (or diagnosing) wellbore and fracture placement, using novel hydraulic fracture characterization techniques related to passive or active monitoring during completions (Tan et al. and Warpinski) or reservoir performance diagnostics once the well is put on production (Clarkson et al.).
    Print ISSN: 1070-485X
    Electronic ISSN: 1938-3789
    Topics: Geosciences
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  • 10
    Publication Date: 2014-10-28
    Description: Natural fractures have long been suspected as a factor in production from shale reservoirs because gas and oil production commonly exceeds the rates expected from low-porosity and low-permeability shale host rock. Many shale outcrops, cores, and image logs contain fractures or fracture traces, and microseismic event patterns associated with hydraulic-fracture stimulation have been ascribed to natural fracture reactivation. Here we review previous work, and present new core and outcrop data from 18 shale plays that reveal common types of shale fractures and their mineralization, orientation, and size patterns. A wide range of shales have a common suite of types and configurations of fractures: those at high angle to bedding, faults, bed-parallel fractures, early compacted fractures, and fractures associated with concretions. These fractures differ markedly in their prevalence and arrangement within each shale play, however, constituting different fracture stratigraphies—differences that depend on interface and mechanical properties governed by depositional, diagenetic, and structural setting. Several mechanisms may act independently or in combination to cause fracture growth, including differential compaction, local and regional stress changes associated with tectonic events, strain accommodation around large structures, catagenesis, and uplift. Fracture systems in shales are heterogeneous; they can enhance or detract from producibility, augment or reduce rock strength and the propensity to interact with hydraulic-fracture stimulation. Burial history and fracture diagenesis influence fracture attributes and may provide more information for fracture prediction than is commonly appreciated. The role of microfractures in production from shale is currently poorly understood yet potentially critical; we identify a need for further work in this field and on the role of natural fractures generally.
    Print ISSN: 0149-1423
    Electronic ISSN: 0149-1423
    Topics: Geosciences
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