Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent
1989-03-23
1990-10-16
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Well logging
73152, G01V 140
Patent
active
049641018
ABSTRACT:
A method for determining the mobility of fluids within earth formations surrounding a borehole. The preferred embodiment of the invention utilizes measured tube wave parameters such as acoustic slowness and attenuation as indicators of formation fluid mobility, and further modifies the results with a mudcake compensated parameter. The mudcake compensated parameter preferably includes a non-zero, finite membrane impedance contribution, and a mudcake elastic deformation contribution. By inputting values for certain mudcake parameters such as mudcake compressional acoustic velocity, shear velocity, density and impedance, the invention generates an improved quantitative estimate for tube wave derived mobility or permeability.
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J. H. Rosenbaum, "Synthetic Microseismograms: Logging in Porous Formations," Geophysics, vol. 39, No. 1, Feb. 1974.
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Cheung Philip S.
Liu Hsui-lin
Lee Peter Y.
Lobo Ian J.
Schlumberger Technology Corp.
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