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US 2015/0315907 A1Published application
New tracers for the study of an oil reservoir in high salinity and high temperature conditions
AssigneeTotal SA
InventorNicolas AGENET
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Abstract
The invention relates to the use of a compound 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 C1 to C4 alkyl group and R′ represents a hydrogen atom, or R and R′ are linked together to form a cycle, and the —R—R′— radical represents —CO—, as a tracer for use in a Single-Well Chemical Tracer Test, to determine the Residual Oil Saturation in oil reservoirs.
Claims9
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 there fro 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):
- R—O—A—O—R′ (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 C1 to C4 alkyl group and R represents as hydrogen atom,
- or R and R′ are linked together to form a cycle, and the —R—R′— radical represents —CO—.
6 more elements
9-15. (canceled)
Dependencies are inferred from the claim text.