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  • 1
    Call number: 9/M 07.0421(435)
    In: Geological Society Special Publication
    Description / Table of Contents: Abstract Reservoir quality is studied using a wide range of similar techniques in both sandstones and carbonates. Sandstone and carbonate reservoir quality both benefit from the study of modern analogues and experiments, but modelling approaches are currently quite different for these two types of reservoirs. There are many common controls on sandstone and carbonate reservoir quality, but also distinct differences due primarily to mineralogy. Numerous controversies remain including the question of oil inhibition, the key control on pressure solution and geochemical flux of material to or from reservoirs. This collection of papers contains case-study-based examples of sandstone and carbonate reservoir quality prediction as well as modern analogue, outcrop analogue, modelling and advanced analytical approaches.
    Type of Medium: Monograph available for loan
    Pages: 453 Seiten , farbige Abbildungen, Tabellen, Grafiken
    ISBN: 978-1-78620-139-3
    Series Statement: Geological Society Special Publication 435
    Language: English
    Location: Reading room
    Branch Library: GFZ Library
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  • 2
    Keywords: reservoir quality ; petroleum reservoirs ; carbonate rocks ; carbonate reservoirs
    Description / Table of Contents: Petroleum reservoir quality prediction: overview and contrasting approaches from sandstone and carbonate communities / R. H. Worden, P. J. Armitage, A. R. Butcher, J. M. Churchill, A. E. Csoma, C. Hollis, R. H. Lander and J. E. Omma / Geological Society, London, Special Publications, 435, 1-31, 1 May 2018, https://doi.org/10.1144/SP435.21 --- Diagenetic pathways linked to labile Mg-clays in lacustrine carbonate reservoirs: a model for the origin of secondary porosity in the Cretaceous pre-salt Barra Velha Formation, offshore Brazil / Nicholas J. Tosca and V. Paul Wright / Geological Society, London, Special Publications, 435, 33-46, 20 November 2015, https://doi.org/10.1144/SP435.1 --- Origin and evolution of microporosity in packstones and grainstones in a Lower Cretaceous carbonate reservoir, United Arab Emirates / Daniel Morad, Matteo Paganoni, Amena Al Harthi, Sadoon Morad, Andrea Ceriani, Howri Mansurbeg, Aisha Al Suwaidi, Ihsan S. Al-Aasm and Stephen N. Ehrenberg / Geological Society, London, Special Publications, 435, 47-66, 21 December 2016, https://doi.org/10.1144/SP435.20 --- Distinguishing between eogenetic, unconformity-related and mesogenetic dissolution: a case study from the Panna and Mukta fields, offshore Mumbai, India / A. J. Barnett, V. P. Wright, V. S. Chandra and V. Jain / Geological Society, London, Special Publications, 435, 67-84, 18 December 2015, https://doi.org/10.1144/SP435.12 --- Role of facies diversity and cyclicity on the reservoir quality of the mid-Cretaceous Mishrif Formation in the southern Mesopotamian Basin, Iraq / Thamer A. Mahdi and Adnan A. M. Aqrawi / Geological Society, London, Special Publications, 435, 85-105, 22 February 2017, https://doi.org/10.1144/SP435.19 --- Burial estimates constrained by clumped isotope thermometry: example of the Lower Cretaceous Qishn Formation (Haushi-Huqf High, Oman) / Cédric M. John / Geological Society, London, Special Publications, 435, 107-121, 18 November 2015, https://doi.org/10.1144/SP435.5 --- Feldspar alteration and Fe minerals: origin, distribution and implications for sandstone reservoir quality in estuarine sediments / Ehsan Daneshvar and Richard H. Worden / Geological Society, London, Special Publications, 435, 123-139, 13 April 2017, https://doi.org/10.1144/SP435.17 --- Evolution of small-scale flow barriers in German Rotliegend siliciclastics / Benjamin Busch, Rebecca Winkler, Keyvan Osivandi, Georg Nover, Alexandra Amann-Hildenbrand and Christoph Hilgers / Geological Society, London, Special Publications, 435, 141-160, 18 November 2015, https://doi.org/10.1144/SP435.3 --- Deformation band development as a function of intrinsic host-rock properties in Triassic Sherwood Sandstone / Joshua Griffiths, Daniel R. Faulkner, Alexander P. Edwards and Richard H. Worden / Geological Society, London, Special Publications, 435, 161-176, 19 January 2016, https://doi.org/10.1144/SP435.11 --- Diagenetic controls on the location of reservoir sweet spots relative to palaeotopographical and structural highs / Jessica E. Poteet, Robert H. Goldstein and Evan K. Franseen / Geological Society, London, Special Publications, 435, 177-215, 21 December 2016, https://doi.org/10.1144/SP435.18 --- Evaluation of porosity change during chemo-mechanical compaction in flooding experiments on Liège outcrop chalk / Wenxia Wang, Merete V. Madland, Udo Zimmermann, Anders Nermoen, Reidar I. Korsnes, Silvana R. A. Bertolino and Tania Hildebrand-Habel / Geological Society, London, Special Publications, 435, 217-234, 26 October 2016, https://doi.org/10.1144/SP435.10 --- Hydrothermal dolomitization: simulation by reaction transport modelling / Alberto Consonni, Alfredo Frixa and Chiara Maragliulo / Geological Society, London, Special Publications, 435, 235-244, 14 June 2016, https://doi.org/10.1144/SP435.13 --- Reservoir quality prediction of deep-water Oligocene sandstones from the west Niger Delta by integrated petrological, petrophysical and basin modelling / O. K. Chudi, Helen Lewis, D. A. V. Stow and J. O. Buckman / Geological Society, London, Special Publications, 435, 245-264, 14 December 2016, https://doi.org/10.1144/SP435.8 --- Diagenesis, plagioclase dissolution and preservation of porosity in Eocene and Oligocene sandstones at the Greeley oil field, southern San Joaquin basin, California, USA / D. T. Nguyen, R. A. Horton and A. B. Kaess / Geological Society, London, Special Publications, 435, 265-282, 28 June 2016, https://doi.org/10.1144/SP435.14 --- History of hydrothermal fluid flow in the midcontinent, USA: the relationship between inverted thermal structure, unconformities and porosity distribution / Bradley D. King and Robert H. Goldstein / Geological Society, London, Special Publications, 435, 283-320, 17 August 2016, https://doi.org/10.1144/SP435.16 --- Enhanced porosity preservation by pore fluid overpressure and chlorite grain coatings in the Triassic Skagerrak, Central Graben, North Sea, UK / Stephan Stricker and Stuart J. Jones / Geological Society, London, Special Publications, 435, 321-341, 5 January 2016, https://doi.org/10.1144/SP435.4 --- Deciphering multiple controls on reservoir quality and inhibition of quartz cement in a complex reservoir: Ordovician glacial sandstones, Illizi Basin, Algeria / Martin Wells, Philip Hirst, Jon Bouch, Emma Whear and Nigel Clark / Geological Society, London, Special Publications, 435, 343-372, 11 December 2015, https://doi.org/10.1144/SP435.6 --- Trace element composition of authigenic quartz in sandstones and its correlation with fluid–rock interaction during diagenesis / Thomas Götte / Geological Society, London, Special Publications, 435, 373-387, 19 January 2016, https://doi.org/10.1144/SP435.2 --- Comparing clay mineral diagenesis in interbedded sandstones and mudstones, Vienna Basin, Austria / Susanne Gier, Richard H. Worden and Peter Krois / Geological Society, London, Special Publications, 435, 389-403, 20 November 2015, https://doi.org/10.1144/SP435.9 --- The relevance of dawsonite precipitation in CO2 sequestration in the Mihályi-Répcelak area, NW Hungary / Csilla Király, Eszter Sendula, Ágnes Szamosfalvi, Réka Káldos, Péter Kónya, István J. Kovács, Judit Füri, Zsolt Bendő and György Falus / Geological Society, London, Special Publications, 435, 405-418, 20 June 2016, https://doi.org/10.1144/SP435.15 --- Reactive transport modelling of compacting siliciclastic sediment diagenesis / C. Geloni, A. Ortenzi and A. Consonni / Geological Society, London, Special Publications, 435, 419-439, 10 December 2015, https://doi.org/10.1144/SP435.7
    Pages: Online-Ressource (VI, 453 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 9781786201393
    Language: English
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  • 3
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Abundant and diverse platinum-group minerals (PGM) occur throughout the Tertiary layered intrusion on Rum, Scotland. In this paper we document the distribution of PGM within the Eastern Layered Series (ELS) on Rum, which comprises 16 alternating units of olivine-dominant feldspathic peridotite grading to plagioclase-dominant allivalite. The PGM occur in six main chrome-spinel layers in the Eastern Layered Series and are clearly associated with minor concentrations of interstitial sulphides. Common PGM phases include: Pd–Cu alloys, Pt–Fe alloys, native Pt, laurite, moncheite, sperrylite, isomertiete, cooperite and braggite along with a large number of other less common arsenide, bismuthotelluride and sulphide phases. Analyses of the discrete chromitite layers yield up to ΣPGE + Au 2618 ppb. Although present throughout the 750-m-thick ELS, there are clear stratigraphical changes in the PGM assemblage. The presence of PGM in the ELS on Rum are interpreted as being caused by mantle melting associated with the proto-Icelandic `hot spot', followed by localised concentration because of the combined effects of magma mixing, sulphide-silicate liquid immiscibility and fractional crystallisation. Most of the PGM are magmatic in origin but some grains show evidence of hydrothermal alteration.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 14 (1979), S. 448-454 
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: It is confirmed that the loss of HO· from the molecular ion of o-nitrotoluene involves exclusively a hydrogen from the methyl group. However, in higher homologues hydrogen atoms from non-benzylic sites are also implicated. With such compounds this fragmentation mode is shown not only by the ortho but, to a lesser extent, by the meta and para isomers as well. The proportion of the total ion current borne by the [M - 17]+ ion follows the order ortho 〉 meta 〉 para, which is attributed to substituent migration around the ring with a hydroxyl radical only being lost when the groups are on adjacent ring atoms. Other ions present in the spectra point to interaction between substituents to form a new heterocyclic ring.
    Additional Material: 7 Tab.
    Type of Medium: Electronic Resource
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  • 5
    Publication Date: 2018
    Description: 〈p〉Chlorite is a key mineral in the control of reservoir quality in many siliciclastic rocks. In deeply buried reservoirs, chlorite coats on sand grains prevent the growth of quartz cements and lead to anomalously good reservoir quality. By contrast, an excess of chlorite – for example, in clay-rich siltstone and sandstone – leads to blocked pore throats and very low permeability. Determining which compositional type is present, how it occurs spatially, and quantifying the many and varied habits of chlorite that are of commercial importance remains a challenge. With the advent of automated techniques based on scanning electron microscopy (SEM), it is possible to provide instant phase identification and mapping of entire thin sections of rock. The resulting quantitative mineralogy and rock fabric data can be compared with well logs and core analysis data. We present here a completely novel Quantitative Evaluation of Minerals by SCANning electron microscopy (QEMSCAN®) SEM–energy-dispersive spectrometry (EDS) methodology to differentiate, quantify and image 11 different compositional types of chlorite based on Fe : Mg ratios using thin sections of rocks and grain mounts of cuttings or loose sediment. No other analytical technique, or combination of techniques, is capable of easily quantifying and imaging different compositional types of chlorite. Here we present examples of chlorite from seven different geological settings analysed using QEMSCAN® SEM–EDS. By illustrating the reliability of identification under automated analysis, and the ability to capture realistic textures in a fully digital format, we can clearly visualize the various forms of chlorite. This new approach has led to the creation of a digital chlorite library, in which we have co-registered optical and SEM-based images, and validated the mineral identification with complimentary techniques such as X-ray diffraction. This new methodology will be of interest and use to all those concerned with the identification and formation of chlorite in sandstones and the effects that diagenetic chlorite growth may have had on reservoir quality. The same approach may be adopted for other minerals (e.g. carbonates) with major element compositional variability that may influence the porosity and permeability of sandstone reservoirs.〈/p〉
    Print ISSN: 0375-6440
    Electronic ISSN: 2041-4927
    Topics: Geosciences
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  • 6
    Publication Date: 2018-12-21
    Description: Chlorite is a key mineral in the control of reservoir quality in many siliciclastic rocks. In deeply buried reservoirs, chlorite coats on sand grains prevent the growth of quartz cements and lead to anomalously good reservoir quality. By contrast, an excess of chlorite – for example, in clay-rich siltstone and sandstone – leads to blocked pore throats and very low permeability. Determining which compositional type is present, how it occurs spatially, and quantifying the many and varied habits of chlorite that are of commercial importance remains a challenge. With the advent of automated techniques based on scanning electron microscopy (SEM), it is possible to provide instant phase identification and mapping of entire thin sections of rock. The resulting quantitative mineralogy and rock fabric data can be compared with well logs and core analysis data. We present here a completely novel Quantitative Evaluation of Minerals by SCANning electron microscopy (QEMSCAN®) SEM–energy-dispersive spectrometry (EDS) methodology to differentiate, quantify and image 11 different compositional types of chlorite based on Fe : Mg ratios using thin sections of rocks and grain mounts of cuttings or loose sediment. No other analytical technique, or combination of techniques, is capable of easily quantifying and imaging different compositional types of chlorite. Here we present examples of chlorite from seven different geological settings analysed using QEMSCAN® SEM–EDS. By illustrating the reliability of identification under automated analysis, and the ability to capture realistic textures in a fully digital format, we can clearly visualize the various forms of chlorite. This new approach has led to the creation of a digital chlorite library, in which we have co-registered optical and SEM-based images, and validated the mineral identification with complimentary techniques such as X-ray diffraction. This new methodology will be of interest and use to all those concerned with the identification and formation of chlorite in sandstones and the effects that diagenetic chlorite growth may have had on reservoir quality. The same approach may be adopted for other minerals (e.g. carbonates) with major element compositional variability that may influence the porosity and permeability of sandstone reservoirs.
    Print ISSN: 0305-8719
    Electronic ISSN: 2041-4927
    Topics: Geosciences
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  • 7
    Publication Date: 2018-05-03
    Description: The porosity and permeability of sandstone and carbonate reservoirs (known as reservoir quality) are essential inputs for successful oil and gas resource exploration and exploitation. This chapter introduces basic concepts, analytical and modelling techniques and some of the key controversies to be discussed in 20 research papers that were initially presented at a Geological Society conference in 2014 titled ‘Reservoir Quality of Clastic and Carbonate Rocks: Analysis, Modelling and Prediction’. Reservoir quality in both sandstones and carbonates is studied using a wide range of techniques: log analysis and petrophysical core analysis, core description, routine petrographic tools and, ideally, less routine techniques such as stable isotope analysis, fluid inclusion analysis and other geochemical approaches. Sandstone and carbonate reservoirs both benefit from the study of modern analogues to constrain the primary character of sediment before they become a hydrocarbon reservoir. Prediction of sandstone and carbonate reservoir properties also benefits from running constrained experiments to simulate diagenetic processes during burial, compaction and heating. There are many common controls on sandstone and carbonate reservoir quality, including environment of deposition, rate of deposition and rate and magnitude of sea-level change, and many eogenetic processes. Compactional and mesogenetic processes tend to affect sandstone and carbonate somewhat differently but are both influenced by rate of burial, and the thermal and pressure history of a basin. Key differences in sandstone and carbonate reservoir quality include the specific influence of stratigraphic age on seawater composition (calcite v. aragonite oceans), the greater role of compaction in sandstones and the greater reactivity and geochemical openness of carbonate systems. Some of the key controversies in sandstone and carbonate reservoir quality focus on the role of petroleum emplacement on diagenesis and porosity loss, the role of effective stress in chemical compaction (pressure solution) and the degree of geochemical openness of reservoirs during diagenesis and cementation. This collection of papers contains case study-based examples of sandstone and carbonate reservoir quality prediction as well as modern analogue, outcrop analogue, modelling and advanced analytical approaches.
    Print ISSN: 0305-8719
    Electronic ISSN: 2041-4927
    Topics: Geosciences
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  • 8
    Publication Date: 2013-01-05
    Description: Porous rocks in the subsurface are now used for carbon capture and storage (CCS), to help ameliorate the effects of greenhouse gas emissions. These porous reservoir rocks require a caprock to retain the CO 2 . It is important to characterize caprock quality and its stability in the presence of elevated partial pressures of CO 2 . Lower Triassic sandstones are common in the UK and NW Europe and are being considered for future CCS projects. The caprock to these sandstones is the Middle and Upper Triassic Mercia Mudstone Group. We have studied the Mercia Mudstone using mineralogy, petrology and mercury injection porosimetry to assess its caprock quality. Detrital minerals are dominated by quartz, K-feldspar, illite and chlorite; diagenetic pore-filling minerals are dominated by calcite, dolomite and gypsum. In samples with abundant clay minerals, there are only small quantities of pore-filling diagenetic cements. Porosity is broadly uniform for both clay-rich and clay-poor samples. The cleaner (clay-poor) samples had their initial pore spaces filled with early diagenetic pore-filling carbonates and gypsum. Despite the broadly uniform porosity, mean pore throat diameter displays a strong inverse correlation with clay content whereas threshold capillary entry pressure shows a strong positive correlation with clay content. The more clay-rich samples represent much better caprock than the coarser-grained samples that contain abundant pore-filling cement. The samples could support potential column heights of supercritical CO 2 between 70 and 540 m and have calculated permeabilities between 10 –20 and 10 –19 m 2 ; leakage would occur only on geological time scales, assuming that these samples are representative of the whole caprock. Because caprock quality correlates with illite content and illite will be relatively immune to elevated partial pressures of CO 2 , the Mercia Mudstone probably represents a durable caprock for future Lower Triassic sandstone CCS projects.
    Print ISSN: 0016-7649
    Topics: Geosciences
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  • 9
  • 10
    Publication Date: 2020-08-06
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Institute of Physics
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