13C NMR of whole cores

H. J. Vinegar, P. N. Tutunjian, W. A. Edelstein, P. B. Roemer

Research output: Contribution to conferencePaperpeer-review


A whole core NMR system has been used to obtain natural abundance 13C spectra. The system enables rapid nondestructive measurements of bulk volume of movable oil, aliphatic/aromatic ratio, oil viscosity, and organic vs carbonate carbon. 13C NMR can be used in cores where the 1H NMR spectrum is too broad to separately resolve oil and water resonances. A 5 1/4 in. 13C/1H NMR coil has been installed on a General Electric CSI-2T NMR imager/spectrometer. With a 4-in. od whole core, good 13C signal-to-noise ratio is obtained within minutes, while 1H spectra are obtained in seconds. NMR measurements have been made of the 13C and 1H density of crude oils with a wide range of API gravities.

Original languageEnglish
Number of pages21219390
StatePublished - 1 Dec 1989
Externally publishedYes
EventProceedings: SPE Annual Technical Conference and Exhibition 1989 - San Antonio, TX, USA
Duration: 8 Oct 198911 Oct 1989


ConferenceProceedings: SPE Annual Technical Conference and Exhibition 1989
CitySan Antonio, TX, USA

ASJC Scopus subject areas

  • General Engineering


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