Method for determining wettability of an oil reservoir

Details Method for determining wettability of an oil reservoir Method for determining wettability of an oil reservoir

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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Freedman, R. et al., Wettability, Saturation, and viscosity Using the Magnetic Resonance Fluid Characterization Method and New Diffusion-Editing Pulse Sequences, SPE 77397, Sep. 29-Oct. 2, 2002.
DePavia, L. et al., A Next-Generation Wireline NMR Logging Tool, SPE 84482, Oct. 5-8, 2003.

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