Electricity: measuring and testing – Particle precession resonance – Using well logging device
Reexamination Certificate
2009-04-29
2011-12-13
Vargas, Dixomara (Department: 2858)
Electricity: measuring and testing
Particle precession resonance
Using well logging device
Reexamination Certificate
active
08076933
ABSTRACT:
A method for determining wettability of an earth formation zone surrounding a borehole, including the following steps: introducing paramagnetic ions into the water component of the zone; performing NMR measurements on the zone, and determining an NMR relaxation time parameter for the zone; extracting a fluid sample from the zone; performing NMR measurements on the sample, and determining the NMR relaxation time parameter for the sample; and determining wettability of the earth formation zone using the determined relaxation time parameter for the zone and the determined relaxation time parameter for the sample.
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DePavia, L. et al., A Next-Generation Wireline NMR Logging Tool, SPE 84482, Oct. 5-8, 2003.
Schlumberger Technology Corporation
Smith David J.
Vargas Dixomara
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