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

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

G - Physics

01

V

358/5.04

G01V 5/04 (2006.01) E21B 43/16 (2006.01) E21B 49/00 (2006.01) E21B 47/10 (2006.01)

Patent

CA 1310140

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. 22658/17/1-1-1/31

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