Measuring and testing – Borehole or drilling – Downhole test
Patent
1987-04-07
1990-01-02
LaRoche, Eugene R.
Measuring and testing
Borehole or drilling
Downhole test
73155, 364422, E21B 4900
Patent
active
048904872
ABSTRACT:
Pressure and flow measurements made during extraction of fluid samples from a subsurface earth formation using a borehole logging tool having a single extraction probe are analyzed to derive separate values for both horizontal and vertical formation permeability. Build-up measurements are used to derive the slope of variation of formation pressure with respect to a spherical time function, and this value is incorporated in an expression for a dimensionless variable relating pressure, flowrate, porosity, compressibility and probe radius. The resulting value of the dimensionless constant provides an index into a look-up table obtained by a new analysis of the fluid dynamics in the immediate vicinity of the probe for an anisotropic formation. The table gives values for two or more dimensionless variables from which the permeability values are derived.
REFERENCES:
patent: 3771360 (1973-11-01), Prats
patent: 4353249 (1982-10-01), Lagus et al.
patent: 4495805 (1985-01-01), Dowling et al.
patent: 4742459 (1988-05-01), Lasseter
Goodier, J. N. and Hodge, P. G., "Elasticity and Plasticity", John Wiley & Sons, Inc., pp. 29-35 (1958).
Stewart, G. and Wittmann, M., "Interpretation of the Pressure Response of the Repeat Formation Tester", Society of Petroleum Engineers of AIME, (SPE 8362), Sep. 23-26, 1979.
Dussan V. Elizabeth B.
Sharma Yogeshwar
Coker David G.
Ham Seung
LaRoche Eugene R.
Schlumberger Technology Corporation
Tager Clifford L.
LandOfFree
Method for determining horizontal and/or vertical permeability o does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for determining horizontal and/or vertical permeability o, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for determining horizontal and/or vertical permeability o will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1377564