Gadolinium compounds for use as oil-soluble tracers

Details Gadolinium compounds for use as oil-soluble tracers Gadolinium compounds for use as oil-soluble tracers

1995-11-29

1998-01-27

Gibson, Sharon

Compositions

Nonreactive analytical, testing, or indicating compositions

252517, 252518, 252521, 252600, 252645, 250260, 250965, 567905, G01N 3100, C09K 700

Patent

active

057119007

ABSTRACT:
A tracer solution suitable for use in measuring flow velocities in a borehole, includes: a) a gadolinium salt of a carboxylic acid of general formula ##STR1## where R is an alkyl of not less than four carbon atoms, typically C4 or C5 alkyl, and R.sub.1 and R.sub.2 are hydrogen or an alkyl group, typically hydrogen, methyl or ethyl; b) a free branched-chain carboxylic acid such as an excess of the acid used to form the Gd salt; and c) a non-polar solvent such as hexane or heptane. The Gd content of the solution should be not less than about 50 g/l and is best when it is as high as possible, for example greater than 100 g/l, and the viscosity should be less than 20 cP.

REFERENCES:
patent: 3784828 (1974-01-01), Hayes
patent: 3970561 (1976-07-01), Sievers et al.
patent: 4166215 (1979-08-01), Anderson
patent: 4166216 (1979-08-01), Cubberly, Jr.
patent: 4233508 (1980-11-01), Arnold
patent: 4423152 (1983-12-01), Lewis et al.
patent: 4522631 (1985-06-01), Mourao et al.
patent: 4755469 (1988-07-01), Showalter et al.
patent: 4825072 (1989-04-01), McWhirter et al.
patent: 4962264 (1990-10-01), Forester
patent: 5047632 (1991-09-01), Hunt
patent: 5108636 (1992-04-01), Leising et al.
patent: 5306911 (1994-04-01), Hunt
patent: 5407560 (1995-04-01), Miyawaki et al.
patent: 5543617 (1996-08-01), Roscoe et al.

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