Application of complementary methods for more robust characterization of sandstone cores

S. Baraka-Lokmane, I. G. Main, B. T. Ngwenya, S. C. Elphick

    Research output: Contribution to journalArticle

    Abstract

    This paper is based on detailed mineralogical, structural, petrophysical, and geochemical studies of sandstone core samples, using routine core analysis methods. These include X-ray computer tomography (CT) scanning, magnetic resonance imaging (MRI), particle size analysis, point counting based on petrographic thin sections, environmental scanning microscopy (ESEM), X-ray diffraction (XRD), and X-ray fluorescence (XRF). In this study, we demonstrate the feasibility of combing these complementary methods in the characterization of reservoir properties of sandstone cores. Four types of sandstones (Slick Rock Aeolian, Fife, Locharbriggs, and Berea sandstones) that differ in grain size, porosity, and mineralogy have been characterized. The results of the different methods used were found to be consistent with each other, but the combination of a variety of methods has allowed a fuller characterization of the rock samples than each method used on its own, bringing out subtle variations in petrographic characteristics that add significant value towards a better description of reservoir properties. For example, it becomes apparent that some types of rocks like Berea sandstones thought to be homogeneous are in fact heterogeneous. The recognition that rock heterogeneity at the sub-centimeter scale may have a significant effect on hydrocarbon recovery requires that field-scale reservoir models take account of these small-scale effects in order to lay claim to reasonable accuracy in production forecasts. © 2007 Elsevier Ltd. All rights reserved.

    Original languageEnglish
    Pages (from-to)39-56
    Number of pages18
    JournalMarine and Petroleum Geology
    Volume26
    Issue number1
    DOIs
    Publication statusPublished - Jan 2009

    Fingerprint

    sandstone
    rock
    core analysis
    scale effect
    X-ray fluorescence
    thin section
    tomography
    microscopy
    mineralogy
    grain size
    porosity
    X-ray diffraction
    particle size
    method
    hydrocarbon

    Keywords

    • Berea sandstone
    • Fife sandstone
    • Locharbriggs sandstone
    • Routine core analysis
    • Slick Rock Aeolian sandstone

    Cite this

    Baraka-Lokmane, S. ; Main, I. G. ; Ngwenya, B. T. ; Elphick, S. C. / Application of complementary methods for more robust characterization of sandstone cores. In: Marine and Petroleum Geology. 2009 ; Vol. 26, No. 1. pp. 39-56.
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    Application of complementary methods for more robust characterization of sandstone cores. / Baraka-Lokmane, S.; Main, I. G.; Ngwenya, B. T.; Elphick, S. C.

    In: Marine and Petroleum Geology, Vol. 26, No. 1, 01.2009, p. 39-56.

    Research output: Contribution to journalArticle

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