Authors: Nikolay Yu ELISEEV. graduated from Gubkin Russian State University of Oil and Gas in 1988, he is Candidate of Technical Sciences, assistant professor of the Department of Physics of Gubkin Russian State University of Oil and Gas. He is specialist in the field of viscous flow of disperse systems, rheology, wave effect on fluids, surface phenomena in crude oil. He is author of more than 40 scientific publications. E-mail: eliseev@gubkin.ru
Abstract: On the basis of pilot rheological studies structural transitions in oil between free disperse state and bound disperse state are found. This effect consists in the system oscillation, with «viscosity bifurcation» at small shift speeds characteristic of this condition of oil. The structural state of samples of heated-up oil was described as «liquidlike» while that at formation temperatures as «solidlike». The structural phase transition of the oil in question from solidlike state to liquidlike state occurs at Тс = 26,5-27,5 °С. The studied oil is a high-concentrated disperse system with increased viscosity explained by capture of considerable volumes of oil in the microgel dispersed particles created by colloids of asphaltenes and waxes
Index UDK: УДК 532.135
Keywords: rheology, structural transitions, viscosity bifurcation, asphaltenes
Bibliography:
1. Dobryansky A.F. Himiya of oil. L.: Tekhizdat, 1961, 229 p.
2. Devlikamov V.V., Khabibulin Z.A., Kabirov M.M. Abnormal oils. M.: Nedra, 1975, 168 p.
3. Syunyaev Z.I., Safiyeva R.Z., Syunyaev R.Z. Oil disperse systems. M.: Chemistry, 1990, 226 p.
4. Pisarevsky V.M., Polyakov V.A., Soshchenko A.E., Chernyaev V.D., Prokhorov A.D., Chelintsev S.N. Pipeline transport nefty with abnormal properties M.: Oil and gas, 1997, 56 p.
5. Evdokimov I.N., Losev A.P., Fesan A.A. Lack of additivity of properties of oil mixtures. Drilling and oil, 2012, no. 1, p. 27-28.
6. Haken X. Synergetrics. M: World, 1980, 406 p.
7. Coussot P., Nguyen Q.D., Huynh H.T., Bonn D. J. Rheol 46, 2002, p. 573-589.
8. Ragouilliaux A., Coussot P., Palermo T., Herzhaft B. Oil & Gas Science and Technology — Rev. IFP, 64, 2009, p. 571-581.
9. Yoshida R. Engineering of Chemical Complexity. World Scientific Publ, 2012, p. 170-186.
10. Krieger I.M., Dougherty T.J. Journal of Rheology 3(1), 1959, р. 137-152.
11. Mooney M. Journal of Colloid Science 6(2), 1951, р. 162-170.
12. Roshchin P.V., Petuhov A.V., Vasquez Kardenas L.K., Nazarov A.D., Hromih L.N. Oil and gas geology. Theory and practice 8 (1), 2013, p. 1-17.
13. Barnes H.A. J. Non-Newtonian Fluid Mech 70, 1997, р. 1-33.
14. Evdokimov I.N. Structural characteristics of trade water oil emulsions. M.: Gubkin RGU of oil and gas publishing Center, 2012, 477 p.
15. Vinogradov G.V. Reologiya of polymers. M.: Chemistry, 1977, 440 p.
16. Malkin A.Ya., Isaev A.I. Reologiya. Concepts, methods, appendices. M.: Profession, 2007, 560 p.