Statoil Asa

Sinvent As

Kolbjorn Zahlsen

Lars Kilaas

Havard Sletta

Paal Skjetne

Ingvar Eide

Per Oscar Wiig

Aslak Einbu

Asgeir Winnberg

Bernd Wittgens

It is described a method and a system for wireless in-situ sampling of a reservoir fluid from a hydrocarbon reservoir comprising obtaining a number of local samples of the reservoir fluid from different zones of the reservoir at given times. Local characterization of production fluid is obtained based on identifying chemical fingerprints of each of the number of local samples. This information can be used to determine local production rates from different zones in the well or from coming led wells.

Method and system for wireless in-situ sampling of a reservoir fluid

The invention provides a method of analysing a complex hydrocarbon-containing mixture, the method comprising the steps of: obtaining a liquid sample of the complex hydrocarbon-containing mixture; injecting the sample into a liquid carrier flowing to a mass spectrometer, wherein the mass spectrometer is set so as to ionise molecules in the sample without causing fragmentation thereof; recording a mass spectrum for ions obtained from the sample; and using the mass spectrum to obtain fingerprint of the mixture. {dot over (a)}In one embodiment, two or more mass spectra are recorded and are combined to obtain a fingerprint of the mixture.

Fingerprinting of complex hydrocarbon containing mixtures

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Trondheim, Norway

Kolbjorn Zahlsen