Patent ID: 9410424
Filing Date: 2016-08-09
CPC Classification: C09K,E21B

Claim Text:
1. A method for measuring Residual Oil Saturation in an oil reservoir, comprising the steps of: injecting a tracer fluid into said oil reservoir; shutting in the oil reservoir during a reaction period; and collecting the tracer fluid back after the reaction period, and analyzing the injected tracer fluid to deduce therefrom the value of the Residual Oil Saturation in said oil reservoir, wherein the injected tracer fluid contains at least one tracer of the general formula (I): wherein A represents an alkanediyl radical having 2 to 4 carbon atoms, which may be substituted by one or more methyl and/or ethyl groups, and either R represents a linear or branched C or R and R′ are linked together to form a cycle, and the —R—R′— radical represents —CO—.