Apparatus for determining horizontal and/or vertical permeabilit

Measuring and testing – Borehole or drilling – Downhole test

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166100, E21B 4900

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active

052791530

ABSTRACT:
Apparatus for obtaining horizontal and/or vertical permeability measurements through a probe having an elongate aperture. The invention uses the elongate aperture in the probe to orient fluid flow in an earth formation horizontally or vertically. The elongate aperture is approximated through the use of a single elongate opening or through the use of a group of aligned openings of varying shapes. Measurements can be taken at different orientations by including additional probe openings along more than one axis.

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patent: 3780575 (1973-12-01), Urbanosky
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patent: 4470456 (1984-09-01), Moutray, III
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patent: 4890487 (1990-01-01), Dussan V. et al.
E. B. Dussan V. et al., An Analysis of the Pressure Response of a Single-Probe Formation Tester, SPE Paper No. 16801, presented at the 62nd Annual Technical Conference and Exhibition of the Society of Petroleum Engineers (1987).
R. Eijpe et al., Geological Note: Mini-Permeameters for Consolidated Rock and Unconsolidated Sand, The American Association of Petroleum Geologists Bulletin, vol. 55, No. 2, (1971) pp. 307-309.
C. McPhee, Proposed Mini-Permeameter Evaluation Report, Edinburgh Petroleum Equipment, Ltd., Edinburgh, Scotland (1987).
D. Goggin et al., A Theoretical and Experimental Analysis of Minipermeameter Response Including Gas Slippage and High Velocity Flow Effects, In Situ, 12 (1 and 2), (1988), pp. 79-116.

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