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Geology of Humber Group : Central Graben and Moray Firth, UKCS (1996)

Geological Society (London, U.K.) ; Hurst, Andrew ; Johnson, Howard D. ; [et al.]

London : The Geological Society

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Keywords: Malm ; Zentrale Nordsee ; Geology ; Hydrocarbons ; North Sea

Description / Table of Contents: J. J. Veldkamp, M. G. Gaillard, H. A. Jonkers, B. K. Levell, M. G. Gaillard, and H. A. Jonkers: A Kimmeridgian time-slice through the Humber Group of the central North Sea: a test of sequence stratigraphic methods / Geological Society, London, Special Publications, 114:1-28, doi:10.1144/GSL.SP.1996.114.01.01 --- Alan Carruthers, Tom Mckie, John Price, Robin Dyer, Gwydion Williams, and Paul Watson: The application of sequence stratigraphy to the understanding of Late Jurassic turbidite plays in the Central North Sea, UKCS / Geological Society, London, Special Publications, 114:29-45, doi:10.1144/GSL.SP.1996.114.01.02 --- M. J. David: History of hydrocarbon exploration in the Moray Firth / Geological Society, London, Special Publications, 114:47-80, doi:10.1144/GSL.SP.1996.114.01.03 --- Richard J. Davies, Kevin J. Stephen, John R. Underhill, Richard J. Davies, and Kevin J. Stephen: A re-evaluation of Middle and Upper Jurassic stratigraphy and the flooding history of the Moray Firth Rift System, North Sea / Geological Society, London, Special Publications, 114:81-108, doi:10.1144/GSL.SP.1996.114.01.04 --- S. D. Harker and M. Rieuf: Genetic stratigraphy and sandstone distribution of the Moray Firth Humber Group (Upper Jurassic) / Geological Society, London, Special Publications, 114:109-130, doi:10.1144/GSL.SP.1996.114.01.05 --- Claire R. Hallsworth, Andrew C. Morton, and Graham Dore: Contrasting mineralogy of Upper Jurassic sandstones in the Outer Moray Firth, North Sea: implications for the evolution of sediment dispersal patterns / Geological Society, London, Special Publications, 114:131-144, doi:10.1144/GSL.SP.1996.114.01.06 --- R. E. Frost and J. F. Rose: Tectonic quiescence punctuated by strike-slip movement: influences on Late Jurassic sedimentation in the Moray Firth and the North Sea region / Geological Society, London, Special Publications, 114:145-162, doi:10.1144/GSL.SP.1996.114.01.07 --- M. A. Martin, J. E. Pollard, and M. A. Martin: The role of trace fossil (ichnofabric) analysis in the development of depositional models for the Upper Jurassic Fulmar Formation of the Kittiwake Field (Quadrant 21 UKCS) / Geological Society, London, Special Publications, 114:163-183, doi:10.1144/GSL.SP.1996.114.01.08 --- Stuart Gowland: Facies characteristics and depositional models of highly bioturbated shallow marine siliciclastic strata: an example from the Fulmar Formation (Late Jurassic), UK Central Graben / Geological Society, London, Special Publications, 114:185-214, doi:10.1144/GSL.SP.1996.114.01.09 --- S. J. C. Cannon and S. Gowland: Facies controls on reservoir quality in the Late Jurassic Fulmar Formation, Quadrant 21, UKCS / Geological Society, London, Special Publications, 114:215-233, doi:10.1144/GSL.SP.1996.114.01.10 --- Geoff Freer, Andrew Hurst, and Paul Middleton: Upper Jurassic sandstone reservoir quality and distribution on the Fladen Ground Spur / Geological Society, London, Special Publications, 114:235-249, doi:10.1144/GSL.SP.1996.114.01.11 --- C. Y. McCants and S. D. Burley: Reservoir architecture and diagenesis in downthrown fault block plays: the Lowlander Prospect of Block 14/20b, Witch Ground Graben, Outer Moray Firth, UK North Sea / Geological Society, London, Special Publications, 114:251-285, doi:10.1144/GSL.SP.1996.114.01.12 --- Michael J. Pearson, Alasdair D. Duncan, and Alasdair D. Duncan: Biomarker maturity profiles in the Inner Moray Firth Basin and implications for inversion estimates / Geological Society, London, Special Publications, 114:287-298, doi:10.1144/GSL.SP.1996.114.01.13 --- B. Dickinson: The Puffin Field: the appraisal of a complex HP-HT gas-condensate accumulation / Geological Society, London, Special Publications, 114:299-327, doi:10.1144/GSL.SP.1996.114.01.14 --- Susan Currie: The development of the Ivanhoe, Rob Roy and Hamish Fields, Block 15/21A, UK North Sea / Geological Society, London, Special Publications, 114:329-341, doi:10.1144/GSL.SP.1996.114.01.15

Pages: Online-Ressource (350 Seiten) , Illustrationen, Diagramme, Karten

ISBN: 1897799705

URL: http://sp.lyellcollection.org/content/114/1

Language: English

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Reservoir characteristics of the Upper Jurassic sequence in the 35/8-2 discovery, Porcupine Basin (2001)

Robinson, A. J. ; Canham, A. C.

In: Geological Society Special Publication 188: 301-321.

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Publication Date: 2001-01-01

Description: The 35/8-2 well, drilled by Phillips Petroleum in 1981, tested oil and gas from a Late Jurassic reservoir within a plunging, tilted fault block. The reservoir is overpressured by 5000 psi and, despite having good porosity and high net to gross ratio, exhibits very low permeability. Three hydrocarbon-bearing sandstone intervals were encountered in the well, and more than 120 m of core was taken from these reservoir sections. The sedimentological structures identified in core are clearly indicative of a deep-water (below storm wave base) submarine fan system, comprising a wide spectrum of turbidite and debris-flow, channel and lobe deposits. Detailed petrographic analysis of the reservoir was undertaken to identify the key factors affecting reservoir quality. The sandstones are chemically immature lithic arenites, containing abundant quartz, feldspar and rock fragments. Reservoir quality is generally poor, largely as a result of the chemical instability of the sandstones. Diagenetic overprinting is the main agent of downgrading the sandstones, with kaolinites and carbonate cements blocking pore throats and reducing permeability. Facies type, sand to mud ratio and ultimately the clastic provenance of the sandstones are also critical factors affecting the reservoir quality in these sandstones. Hydrocarbon flow was predominantly from a single sandstone facies (B1) and was confined to the A' sand interval in well 35/8-2, but it is inferred that this facies may occur away from the wellbore in all three sand intervals. Uncertainties in the results of the drillstem test and pressure data demonstrate that it is not possible to confirm whether the hydrocarbons present in the reservoir are gas condensate or volatile oil. Uncertainty in the extent of the productive reservoir facies, hydrocarbon columns and hydrocarbon type are challenges that must be overcome before the reserves contained within the 35/8-2 structure can be developed.

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Geochemical Correlation In An Exhumed Submarine Channel Complex (Tabernas Basin, Se Spain): Comparison To Sedimentological Correlation At Various Length Scales (2013)

Aehnelt, M., Worden, R. H., Canham, A. C., Hill, S. J., Hodgson, D. M., Flint, S. S.

Society for Sedimentary Geology (SEPM)

In: Journal of Sedimentary Research

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Publication Date: 2013-07-31

Description: A bstract : Whole-rock, inorganic, geochemical data have previously been used to aid characterization and stratigraphic correlation of fossil-poor clastic sedimentary deposits, although this approach has not yet been calibrated by testing chemostratigraphic correlations against physical stratigraphic correlations from outcrop. Chemical data from a well-exposed siliciclastic succession in a Tortonian (late Miocene) submarine slope channel system in the Tabernas Basin of southern Spain were generated using X-ray fluorescence supplemented by X-ray diffraction, SEM analysis, and light microscopy. Amongst the 〉 60 elements measured, nearly a quarter of them have proved to be useful or reliable for geochemically based correlation at the tested scales (~ 10 m, ~ 50 m, ~ 100 m). These elements are SiO 2 , K 2 O, Al 2 O 3 , CaO, and TiO 2 , as well as Zr, Nb, Th, Rb, Cs, As, and the rare earth elements, La, Nd, and Ce. High-resolution, bed-to-bed geochemical correlation is feasible over short distances (~ 10 m). Geochemical data from sections in beds that are traceable suggest that a given stratigraphic level seems to be geochemically homogeneous with respect to some key elements. Geochemical data also provide a useful aid for high-resolution sedimentary correlation, at distances of several tens of meters up to at least 100 m. Since each individual bed seems to be broadly homogeneous in composition, at a larger scale it is possible to discern a provenance signal in geochemical data. Chemical stratigraphy thus seems to work even in stratigraphically complicated submarine channel complexes.

Print ISSN: 1527-1404

Topics: Geosciences