Permeability prediction using stress sensitive petrophysical properties

C. Jones, J. M. Somerville, B. G D Smart, O. Kirstetter, S. A. Hamilton, K. P. Edlmann

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)

    Abstract

    The correlation of stress sensitivity to various petrophysical parameters was studied by analysis of experimental results from a range of sandstone core plugs tested hydrostatically at room temperature. The parameters measured were: compressional wave velocity, porosity, permeability and electrical resistivity. More detailed information on the effects of sorting and grain size distributions was obtained from experiments on artificial, unconsolidated sandstone cores. The measurements showed a high of degree of stress sensitivity, which was different for each core but, broadly, could be classified as either high or low stress sensitivity. Cores from the high permeability clean sand were less stress sensitive than the cores from the low permeability coarsening-upwards sequence and the petrophysical values when combined into a synthetic log distinguished between the two lithologies. The results were compared to the predictions of a simple asperity deformation model. The experimental results and the model suggested a possible logging strategy to deduce permeability, by varying wellbore pressure.

    Original languageEnglish
    Pages (from-to)211-219
    Number of pages9
    JournalPetroleum Geoscience
    Volume7
    Issue number2
    Publication statusPublished - 2001

    Keywords

    • Acoustic property
    • Grain sorting
    • Permeability
    • Stress sensitivity

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