Measuring and testing – With fluid pressure – Porosity or permeability
Patent
1976-08-24
1977-10-11
Yasich, Daniel M.
Measuring and testing
With fluid pressure
Porosity or permeability
G01N 1508
Patent
active
040528855
ABSTRACT:
The invention is directed to a device which is used for determining permeability characteristics of earth formations at the surface thereof. The determination of the maximum permeability direction and the magnitude of permeability are achieved by employing a device comprising a housing having a central fluid-injection port surrounded by a plurality of spaced-apart fluid flow and pressure monitoring ports radially extending from the central injection port. With the housing resting on the earth formation in a relatively fluid-tight manner as provided by an elastomeric pad disposed therebetween, fluid is injected through the central port into the earth formation and into registry with the fluid-monitoring ports disposed about the injection port. The fluid-monitoring ports are selectively opened and the flow of the fluid through the various fluid ports is measured so as to provide a measurement of flow rates and pressure distribution about the center hole which is indicative on the earth formation permeability direction and magnitude. For example, the azimuthal direction of the fluid-monitoring ports in the direction through which the greatest amount of injected fluid flows as determined by the lowest pressure distribution corresponds to the direction of maximum permeability in the earth formation.
REFERENCES:
patent: 2345935 (1944-04-01), Hassler
patent: 2949766 (1960-08-01), Kirkham et al.
patent: 3548635 (1970-12-01), Hutchinson et al.
patent: 3861196 (1975-01-01), Domenighetti
patent: 3889521 (1975-06-01), Jakimowicz
Publication: "Measurement of Air Permeability of Soil in Situ" by Evans et al., Soil Science Society Proceedings, vol. 14, 1949, pp. 65-69, 72-73.
Carlson Dean E.
Hamel Stephen D.
Larcher Earl L.
The United States of America as represented by the United States
Yasich Daniel M.
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