Perfluorocarbon tracer transport and dispersion experiment in the North Sea Ekofisk oil field. Revision.

摘要

A perfluorocarbon tracer (PFT) transport and dispersion experiment has been performed in the Ekofisk section of the North Sea Oil fields. Fifty grams each of three PFTs were injected into a well and 28 surrounding wells were sampled for the presence of PFT. Sampling was accomplished by initially collecting bottles of reservoir hydrocarbon gas and subsequently transferring 5 liter (gas phase) aliquots onto Capillary Adsorbent Tracer (CAT) samplers. The resulting CATS samplers were analyzed for PFT in a specially configured laboratory gas chromatograph with electron capture detection. Sampling was performed up to two years past the injection time. PFT was observed only in four sampling wells at four different times. The PFT concentrations observed in these four wells appeared to follow an exponential dilution law with a dilution half-life of approximately 70 days in the reservoir. 5 refs., 28 figs. (ERA citation 15:033116)