High-field nuclear magnetic logging for evaluating viscosity of Tatarstan extra-heavy oil

UDK: 550.832.582
Key words: extra-heavy oil, nuclear magnetic resonance (NMR), viscosity, high-field nuclear magnetic logging (NML)
Authors: R.S. Khisamov, R.Sh. Dinmukhamedov (Tatneft PJSC, RF, Almetyevsk), K.M. Musin (TatNIPIneft, RF, Bugulma), T.R. Abdullin, T.V. Shipunov (NTC Tatneft OOO, RF, Bugulma)
The purpose of this study is to determine the viscosity of heavy oil based on high-field nuclear-magnetic logging (NML) survey results. The procedure developed for the purposes of the study is based on the viscosity vs. spin-spin relaxation time T2 correlation dependence. More than 100 heavy oil samples extracted from the appraisal well’s oil-wet cores through high-speed centrifugation were used for the laboratory research. Spectrometer GeoSpec 2/100 (Oxford Instruments) was used for the tests at standard conditions. Empirical relationships were derived to determine oil viscosity using data about magnetic-relaxation characteristics of heavy oil in pore space. It was found that the average logarithmic of spin-spin relaxation time correlates with oil viscosity in the best way. The accuracy of the oil viscosity estimate made 20 %. These correlations and the procedure of NMR-data interpretation were used in the pilot project aimed at evaluation of viscosity heterogeneity using the high-field NML technique. Borehole surveys were carried out jointly with OOO TNG-Group. For logging, state-of-the-art NML-tools developed by OOO TNG-Group and the Kazan Federal University were used. The results obtained are comparable with direct in-situ viscosity measurement with the oscillatory viscometer HOV-700–development of Vinci Technology–with a PT measurement element to simulate reservoir pressure and temperature.
References
1. Zaripov A.T., Sozdanie i issledovanie kompleksa tekhnologiy dlya effektivnoy
razrabotki melkozalegayushchikh zalezhey tyazheloy nefti s primeneniem
termicheskogo vozdeystviya na produktivnyy plast (Creation and research
of complex of technologies for efficient development of shallow
heavy oil with application of thermal effects on the producing formation):
thesis of doctor of technical science, Bugul'ma, 2015.
2. LaTorraca G.A., Low-field NMR determinations of the properties of heavy
oils and water-in-oil emulsions, Magnetic Resonance Imaging, 1998, V. 16,
no. 5, pp. 659–662.
3. Yang Z., Hirasaki G.J., NMR measurement of bitumen at different temperatures,
Journal of Magnetic Resonance, 2008, V. 192, no. 2, pp. 280–293.
4. Musin K.M., Fomichev A.V., Sotnikov O.S. et al., Determination of the viscosity
of EHV oil at reservoir conditions using core samples data (In Russ.), Vestnik
TsKR Rosnedra, 2015, no. 4, pp. 16–21.
5. Musin K.M., Abdullin T.R., Gibadullin A.A., On spatial heterogeneity of the
distribution of viscosity of EHV oil within a deposit of the Sheshminskiy horizon
(In Russ.), Vestnik TsKR Rosnedra, 2015, no. 4, pp. 22–25.
6. Zaripov T.A., Gizatullin B.I., Lozovoy A.R. et al., Study of correlation of oil flow
properties with nuclear magnetic resonance and self-diffusion characteristics
(In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 2, pp. 74–77.
7. Shkalikov N.V., Skirda V.D., Archipov R.V., Solid-like component in the spinspin
NMR-relaxation of heavy oils, Magnetic Resonance in Solids. Electronic
Journal, 2006, V. 8, no. 1, pp. 38–42.
8. Arkhipov R.V., Kosarev V.E., Nurgaliev D.K. et al., Features of coupling between
rheological properties of oil and natural bitumen and the self-diffusion
data obtained by NMR method (In Russ.), Neftyanoe khozyaystvo = Oil Industry,
2013, no. 6, pp. 60–63.
9. Chizhik V.I., Yadernaya magnitnaya relaksatsiya (Nuclear magnetic relaxation),
St. Petersburg: Publ. of Sp. – SPb.: Izd-vo St. Petersburg University,
2004, 388 р.
10. Deng F., Rapid determination of fluid viscosity using low field two-dimensional
NMR, Journal of Magnetic Resonance, 2014, V. 247, pp. 1–8.
11. Sun B., In situ fluid typing and quantification with 1D and 2D NMR logging,
Magnetic resonance imaging, 2007, V. 25, no. 4, pp. 521–524.
12. Lin M.S., A new suspension viscosity model and its application to asphaltene
association thermodynamics and structures, Structures and Dynamics
of Asphaltenes, Springer US, 1998, pp. 267–302.
The purpose of this study is to determine the viscosity of heavy oil based on high-field nuclear-magnetic logging (NML) survey results. The procedure developed for the purposes of the study is based on the viscosity vs. spin-spin relaxation time T2 correlation dependence. More than 100 heavy oil samples extracted from the appraisal well’s oil-wet cores through high-speed centrifugation were used for the laboratory research. Spectrometer GeoSpec 2/100 (Oxford Instruments) was used for the tests at standard conditions. Empirical relationships were derived to determine oil viscosity using data about magnetic-relaxation characteristics of heavy oil in pore space. It was found that the average logarithmic of spin-spin relaxation time correlates with oil viscosity in the best way. The accuracy of the oil viscosity estimate made 20 %. These correlations and the procedure of NMR-data interpretation were used in the pilot project aimed at evaluation of viscosity heterogeneity using the high-field NML technique. Borehole surveys were carried out jointly with OOO TNG-Group. For logging, state-of-the-art NML-tools developed by OOO TNG-Group and the Kazan Federal University were used. The results obtained are comparable with direct in-situ viscosity measurement with the oscillatory viscometer HOV-700–development of Vinci Technology–with a PT measurement element to simulate reservoir pressure and temperature.
References
1. Zaripov A.T., Sozdanie i issledovanie kompleksa tekhnologiy dlya effektivnoy
razrabotki melkozalegayushchikh zalezhey tyazheloy nefti s primeneniem
termicheskogo vozdeystviya na produktivnyy plast (Creation and research
of complex of technologies for efficient development of shallow
heavy oil with application of thermal effects on the producing formation):
thesis of doctor of technical science, Bugul'ma, 2015.
2. LaTorraca G.A., Low-field NMR determinations of the properties of heavy
oils and water-in-oil emulsions, Magnetic Resonance Imaging, 1998, V. 16,
no. 5, pp. 659–662.
3. Yang Z., Hirasaki G.J., NMR measurement of bitumen at different temperatures,
Journal of Magnetic Resonance, 2008, V. 192, no. 2, pp. 280–293.
4. Musin K.M., Fomichev A.V., Sotnikov O.S. et al., Determination of the viscosity
of EHV oil at reservoir conditions using core samples data (In Russ.), Vestnik
TsKR Rosnedra, 2015, no. 4, pp. 16–21.
5. Musin K.M., Abdullin T.R., Gibadullin A.A., On spatial heterogeneity of the
distribution of viscosity of EHV oil within a deposit of the Sheshminskiy horizon
(In Russ.), Vestnik TsKR Rosnedra, 2015, no. 4, pp. 22–25.
6. Zaripov T.A., Gizatullin B.I., Lozovoy A.R. et al., Study of correlation of oil flow
properties with nuclear magnetic resonance and self-diffusion characteristics
(In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 2, pp. 74–77.
7. Shkalikov N.V., Skirda V.D., Archipov R.V., Solid-like component in the spinspin
NMR-relaxation of heavy oils, Magnetic Resonance in Solids. Electronic
Journal, 2006, V. 8, no. 1, pp. 38–42.
8. Arkhipov R.V., Kosarev V.E., Nurgaliev D.K. et al., Features of coupling between
rheological properties of oil and natural bitumen and the self-diffusion
data obtained by NMR method (In Russ.), Neftyanoe khozyaystvo = Oil Industry,
2013, no. 6, pp. 60–63.
9. Chizhik V.I., Yadernaya magnitnaya relaksatsiya (Nuclear magnetic relaxation),
St. Petersburg: Publ. of Sp. – SPb.: Izd-vo St. Petersburg University,
2004, 388 р.
10. Deng F., Rapid determination of fluid viscosity using low field two-dimensional
NMR, Journal of Magnetic Resonance, 2014, V. 247, pp. 1–8.
11. Sun B., In situ fluid typing and quantification with 1D and 2D NMR logging,
Magnetic resonance imaging, 2007, V. 25, no. 4, pp. 521–524.
12. Lin M.S., A new suspension viscosity model and its application to asphaltene
association thermodynamics and structures, Structures and Dynamics
of Asphaltenes, Springer US, 1998, pp. 267–302.


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