Electricity: measuring and testing – Particle precession resonance – Using well logging device
Reexamination Certificate
2008-02-01
2010-11-23
Shrivastav, Brij B. (Department: 2831)
Electricity: measuring and testing
Particle precession resonance
Using well logging device
C324S306000, C324S318000
Reexamination Certificate
active
07839144
ABSTRACT:
A method for estimating a viscosity of a fluid in a rock formation, the method including: performing a first nuclear magnetic resonance (NMR) measurement with zero magnetic field gradient on at least a portion of a sample of the rock formation to obtain a first distribution of transverse relaxation time constants; estimating a first diffusive couple factor from the first distribution; replacing the fluid of the at least a portion of the sample with another fluid; performing a second NMR measurement with zero magnetic field gradient on the at least a portion of the sample containing the another fluid to obtain a second distribution of transverse relaxation time constants; estimating a second diffusive couple factor from the second distribution; and estimating the viscosity of the fluid using the first diffusive couple factor and the second diffusive couple factor.
REFERENCES:
patent: 5146924 (1992-09-01), Sepponen
patent: 5211166 (1993-05-01), Sepponen
patent: 5218964 (1993-06-01), Sepponen
patent: 7053611 (2006-05-01), Freedman
patent: 2005/0270023 (2005-12-01), Freedman
patent: 2009/0195246 (2009-08-01), Jebutu
T.K. Ogun, “Reservoir Development Optimisation Utilizing Nuclear Magnetic Resonance Technology”. SPE 57860. Aug. 4-6, 1999. pp. 1-9.
B. Terry, et al. “Profiling the Wall-Cake Characterisitc of theWellbore for Optimal Comparison of Logging-While-Drilling and Wireline-Bulk-Density Measurements”. SPE 96633. Oct. 9-12, 2005. pp. 1-7.
W.J. Looyestijn. “Distinguishing Fluid Properties and Proucibility for NMR Logs”. Proceedings of the 6th Nordic Symposium on Petrophysics, May 15-16, 2001, Trondheim, Norway. pp. 1-9.
Baker Hughes Incorporated
Cantor & Colburn LLP
Fetzner Tiffany A
Shrivastav Brij B.
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