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Design criteria for laboratory measurements of low permeability rocks
Author(s) -
Trimmer Donald A.
Publication year - 1981
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl008i009p00973
Subject(s) - transient (computer programming) , pulse (music) , reduction (mathematics) , materials science , systematic error , computer science , acoustics , optics , mathematics , physics , statistics , geometry , detector , operating system
The advantages and limitations of two versions of the pulse technique for laboratory measurements of low permeabilities (10 −16 to 10 −24 m²) are discussed. The transient pulse technique developed by Brace et al. [1968] is the preferred method because of the ease of data reduction. The modified transient pulse technique developed by Trimmer et al. [1980] can be used when the assumptions inherent in the transient pulse technique are invalid. The systematic error associated with the transient pulse technique is a function of the ratio of the effective sample pore volume to the reservoir volumes. If this ratio is less than 0.25, then the error associated with the transient technique is less than 10%. The modified transient pulse technique does not suffer from this systematic error. Criteria are also presented for optimizing the experimental configuration for measurement durations as well as ease of data reduction.