mriselMagnetic Resonance in SolidsMagnetic Resonance in Solids2072-5981Kazan Federal Universitymrisel-204Research ArticleСтатьиSolid-like Component in the Spin-Spin NMR-Relaxation of Heavy OilsShkalikovN. V.

420008, Kremlevskaya, 18, Kazan

Nikolay.Shkalikov@ksu.ruSkirdaV. D.

420008, Kremlevskaya, 18, Kazan

ArkhipovR. V.

420008, Kremlevskaya, 18, Kazan

Kazan State UniversityRussian Federation200621012024813842Copyright © Shkalikov N.V., Skirda V.D., Arkhipov R.V., 20242024Shkalikov N.V., Skirda V.D., Arkhipov R.V.Shkalikov N.V., Skirda V.D., Arkhipov R.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.mrsej.ru/jour/article/view/204

The study of row heavy oil samples from Tatarstan and Vietnam oil wells was done by solid-echo nuclear magnetic resonance (NMR) technique on the hydrogen nuclei. For the first time in the oil study, the component with short spin-spin relaxation time (T2s = 9.8-31.2 ms) and free induction decay (FID) shape similar to a solid one was detected for all oil samples. Density 𝜌, "zero" viscosity 𝜂0, asphaltene content and solid part PS of 1H NMR signal were measured for whole row oil samples. The correlation between the part PS of 1H NMR signal and oil density r was found for samples of Tatarstan oil, by the other hand, data for samples of Vietnam oil did not show the correlation. No correlation dependences of the part PS of 1H NMR signal and "zero" viscosity 𝜂0 from asphaltene amount for whole row of oil samples were confirmed, that indicates other crystalline supramolecular structures (more probably, crystalline paraffin) existence in the oil. As a main result, the correlation between oil viscosity and the amount of the solid-like structures in it was found. The significant differences of the solid-echo signal shapes and spin-spin relaxation times of the solid-like structures were obtained for the different oil samples, that demands additional studies.

Nuclear magnetic resonancesolid-echoheavy oilsasphaltenesWork is supported by Schlumberger R&D and the Federal Agency on the Science (under contracts N 02.451.11.7019 and N 02.445.11.7402).ReferencesLin M.-S., Chaffin J.M., Davison R.R., Glover C.J., Bullin J.A. in Structures and Dynamics of Asphaltenes, edited by O. C. Mullins and E. Y. Sheu (Plenum, New York, 1998), p. 267.Lin M.-S., Chaffin J.M., Davison R.R., Glover C.J., Bullin J.A. in Structures and Dynamics of Asphaltenes, edited by O. C. Mullins and E. Y. Sheu (Plenum, New York, 1998), p. 267.Sheu E.Y in Structures and Dynamics of Asphaltenes, edited by O. C. Mullins and E. Y. Sheu (Plenum, New York, 1998), p. 115.Sheu E.Y in Structures and Dynamics of Asphaltenes, edited by O. C. Mullins and E. Y. Sheu (Plenum, New York, 1998), p. 115.Kimmich R. NMR: tomography, diffusometry, relaxometry (Springer-Verlag, Berlin, 1997), p. 26.Kimmich R. NMR: tomography, diffusometry, relaxometry (Springer-Verlag, Berlin, 1997), p. 26.

The authors declare that there are no conflicts of interest present.