Evaluation and Application of the Transient-Pulse Technique for Determining the Hydraulic Properties of Low-Permeability Rocks—Part 1: Theoretical Evaluation

    Volume 23, Issue 1 (March 2000)

    ISSN: 0149-6115

    CODEN: GTJOAD

    Page Count: 8


    Zhang, M
    Geological Survey of Japan, Ibaraki,

    Takahashi, M
    Geological Survey of Japan, Ibaraki,

    Morin, RH
    United States Geological Survey, Denver, CO

    Esaki, T
    Faculty of Engineering, Kyushu University, Fukuoka,

    (Received 29 December 1998; accepted 29 September 1999)

    Abstract

    The transient-pulse technique is a well-established laboratory method for determining the permeability of hydraulically tight rocks. Although graphical solutions to this test make it possible to evaluate both the permeability and the specific storage of a rock specimen, the attendant procedures are relatively complicated. Often, the expression introduced by Brace et al. (1968) is typically used to interpret the experimental results and arrive at a value for permeability only. In Part 1 of this study, the general solution for the transient-pulse test is extended to consider quantitatively the transient distributions of hydraulic head and hydraulic gradient within the specimen and to examine the validity of using the solution presented by Brace et al. (1968) under these conditions. Based on a series of parametric studies, some theoretical and practical considerations related to the design of a transient-pulse test are also provided. In Part 2, a relatively convenient and general approach to calculating the specific storage of a specimen from a transient-pulse test is presented and its efficiency is demonstrated through the application of this approach to experimental investigations.


    Paper ID: GTJ11126J

    DOI: 10.1520/GTJ11126J

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    Author
    Title Evaluation and Application of the Transient-Pulse Technique for Determining the Hydraulic Properties of Low-Permeability Rocks—Part 1: Theoretical Evaluation
    Symposium , 0000-00-00
    Committee D18