Estimation of permeability and rock mechanical properties of limestone reservoir rocks under stress conditions by strain gauge

A. G. Işcan, M. V. Kök, A. S. Bagci

    Research output: Contribution to journalArticle

    Abstract

    Petroleum engineering reservoir parameter calculations are generally performed in the absence of the overburden pressure effect. This leads to serious errors in further development of a hydrocarbon-bearing reservoir. Thus, measurements under stress conditions become important vitally. The objective is to correlate the overburden pressure and the permeability to see the overburden pressure effects on the permeability of Turkish southeastern limestone reservoir rock samples. Stress was applied to four representative limestone samples taken from southeast Turkey. In the laboratory tests, two identical core plugs from every sample were used for each application. This is why a Wheatstone Bridge with a full-bridge strain gauge method was used. A sample is inserted into a load frame and the axial load was increased. Internal friction angles and cohesion factors were determined. An exponential correlation was proposed between permeability and confining pressure. The experimental and correlated results match very accurately. The stress and permeability correlations may be useful with resistivity logs through which permeability may be measured and for stress-strain-related CBL (cement bond logs) which are used for the well bore stability during cementing applications. © 2006 Elsevier B.V. All rights reserved.

    Original languageEnglish
    Pages (from-to)13-24
    Number of pages12
    JournalJournal of Petroleum Science and Engineering
    Volume53
    Issue number1-2
    DOIs
    Publication statusPublished - Aug 2006

    Fingerprint

    reservoir rock
    gauge
    mechanical property
    limestone
    permeability
    overburden
    pressure effect
    rock
    petroleum engineering
    confining pressure
    cohesion
    electrical resistivity
    cement
    friction
    hydrocarbon
    well

    Keywords

    • Limestone
    • Permeability
    • Rock mechanics
    • Strain
    • Stress

    Cite this

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    abstract = "Petroleum engineering reservoir parameter calculations are generally performed in the absence of the overburden pressure effect. This leads to serious errors in further development of a hydrocarbon-bearing reservoir. Thus, measurements under stress conditions become important vitally. The objective is to correlate the overburden pressure and the permeability to see the overburden pressure effects on the permeability of Turkish southeastern limestone reservoir rock samples. Stress was applied to four representative limestone samples taken from southeast Turkey. In the laboratory tests, two identical core plugs from every sample were used for each application. This is why a Wheatstone Bridge with a full-bridge strain gauge method was used. A sample is inserted into a load frame and the axial load was increased. Internal friction angles and cohesion factors were determined. An exponential correlation was proposed between permeability and confining pressure. The experimental and correlated results match very accurately. The stress and permeability correlations may be useful with resistivity logs through which permeability may be measured and for stress-strain-related CBL (cement bond logs) which are used for the well bore stability during cementing applications. {\circledC} 2006 Elsevier B.V. All rights reserved.",
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    Estimation of permeability and rock mechanical properties of limestone reservoir rocks under stress conditions by strain gauge. / Işcan, A. G.; Kök, M. V.; Bagci, A. S.

    In: Journal of Petroleum Science and Engineering, Vol. 53, No. 1-2, 08.2006, p. 13-24.

    Research output: Contribution to journalArticle

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