Construction of a slim-tube equipment for gas tracer evaluation at simulated reservoir conditions

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Abstract

For several years the application of tracers has been a supplementary technique to monitor fluid flow in oil and gas reservoirs. This work describes the design and construction of a slim-tube equipment for evaluation of different gas tracers under reservoir conditions. The intention behind the construction and build-up of this high-pressure equipment is to study the interaction between the rock matrix and various tracer molecules, and the interaction between oil and the tracer molecules. Chemical tracers, i.e. perfluorinated hydrocarbons, are analysed on-line by gas chromatography with EC-detection. Radioactively labelled tracer gases are analysed by automatic sample collection followed by liquid scintillation counting directly on the gas phase.

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