Use of tracers to monitor in situ miscibility of solvent in oil

Details Use of tracers to monitor in situ miscibility of solvent in oil Use of tracers to monitor in situ miscibility of solvent in oil

1991-06-06

1992-05-12

Suchfield, George A.

Wells

Processes

With indicating, testing, measuring or locating

166250, 436 27, 436 56, E21B 4900, E21B 4322

Patent

active

051118823

ABSTRACT:
A method for monitoring in situ miscibility of a solvent with reservoir oil by using at least two tracers having different boiling points and being miscible with the solvent. The tracers are mixed with the solvent, injected into a well and produced from another well. Appropriate analysis of the produced tracers will reveal whether the solvent is first contact miscible. The tracers are selected from the group consisting of halocarbons, halo-hydrocarbons, sulfur hexafluoride, tritiated or carbon 14 tagged hydrocarbons, tritium gas and radioactive isotopes of inert gases.

REFERENCES:
patent: 3008521 (1961-11-01), Boucher
patent: 3231018 (1966-01-01), Handy
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patent: 3894584 (1975-07-01), Fertl
patent: 4223727 (1980-09-01), Sustek, Jr. et al.
patent: 4725551 (1988-02-01), Thompson
patent: 4742873 (1988-05-01), Craig, III

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