In-situ permeability determining method

Details In-situ permeability determining method In-situ permeability determining method

1983-03-15

1985-01-29

Myracle, Jerry W.

Measuring and testing

Borehole or drilling

Downhole test

E21B 4710

Patent

active

044958056

ABSTRACT:
A method of determining the permeability of a particular stratum in an earth formation traversed by a borehole includes injecting a liquid into the borehole at a first pressure thereby causing liquid flow into the stratum. A first flow rate of the liquid is determined at the first pressure. The pressure of the liquid being injected into the borehole is then changed to a second pressure level and a second flow rate of the liquid flowing into the stratum is determined at the second pressure. An indication of the permeability of the stratum is then derived in accordance with the two pressures, the two flow rates and known characteristics of the stratum.

REFERENCES:
patent: 3871218 (1975-03-01), Louis
patent: 4353249 (1982-10-01), Lagus et al.

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