Electricity: measuring and testing – Particle precession resonance – Using well logging device
Patent
1998-02-13
2000-07-04
Oda, Christine K.
Electricity: measuring and testing
Particle precession resonance
Using well logging device
324300, 335296, G01V 300
Patent
active
060844086
ABSTRACT:
A method for determining intrinsic transverse relaxation time of a first mobile phase in a porous medium using nuclear magnetic resonance measurement sequences. The sequences are measured at first and second wait times. At least two different interecho spacing times are used for each wait time. The first and second wait time are selected to provide different magnetization recoveries of the first phase, and are selected to be longer than the longitudinal relaxation time of a second mobile phase. For the measurements made at the first interecho spacing time, components of signals in the measurements corresponding to the first phase are separated from components corresponding to the second mobile phase by determining differences between the signals measured at the first and at the second wait times. The step of separating is performed for each of the interecho spacing times. An apparent transverse relaxation time of the first mobile phase is calculated from the separated components for each one of the interecho spacing times. A relationship of the apparent transverse relaxation time with respect to the interecho spacing time is determined, and the intrinsic relaxation time is calculated from the relationship. Viscosity of the first mobile phase can be determined from the intrinsic relaxation time.
REFERENCES:
patent: 5291137 (1994-03-01), Freedman
patent: 5486762 (1996-01-01), Freedman et al.
patent: 5498960 (1996-03-01), Vinegar et al.
patent: 5517115 (1996-05-01), Prammer
patent: 5557200 (1996-09-01), Coates
patent: 5698979 (1997-12-01), Taicher
patent: 5712566 (1998-01-01), Taicher
Chen Songhua
Georgi Daniel T.
Fagin Richard A.
Oda Christine K.
Shrivastav Brij B.
Springs Darryl M.
Western Atlas International Inc.
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