Quick method to determine subsidence, reservoir compaction, and in-situ stress induced by reservoir depletion

N. Morita, D. L. Whitfill, O. Nygaard, A. Bale

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    44 Citations (Scopus)

    Abstract

    A method is presented to determine subsidence, compaction, and in-situ stress induced by pore-pressure change. The method is useful for a reservoir whose Young's modulus is less than 20% or greater than 150% of the Young's modulus of the surrounding formation (where the conventional uniaxial strain assumption may not hold). In this work, a parameter study was conducted to find groups of parameters controlling the in-situ stress, subsidence, and compaction. These parameter groups were used to analyze the numerical calculation results generated by a three-dimensional (3D), general, nonlinear, finite-element model (FEM). The procedure and a set of figures showing how to calculate the in-situ stress, subsidence, and compaction induced by pore-pressure changes are provided. Example problems are also included to prevent confusion on sign convention and units.

    Original languageEnglish
    Pages (from-to)71-79
    Number of pages9
    JournalJPT, Journal of Petroleum Technology
    Volume41
    Issue number1
    Publication statusPublished - 1989 Jan

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    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Earth and Planetary Sciences (miscellaneous)
    • Energy Engineering and Power Technology
    • Fuel Technology

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