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- Title
PECULIARITIES OF THE PROCESS OF DESTRUCTION OF STABLE WATER-OIL EMULSIONS IN INTERMEDIATE LAYERS.
- Authors
Sladovskaya, Olga Yu.; Tsyganov, Dmitry G.; Bashkirtseva, Natalia Yu.; Mukhametzyanova, Aliya A.
- Abstract
Currently, most oil fields and reservoirs in Russia have entered a late stage of development: the average field waret cut of many large deposits is more than 80 %, and for the unique - 92 %. The encroachment of production horizons of reservoirs causes serious complications in oil recovery, collection and preparation processes associated with the formation of water-oil emulsions. Due to the presence of a dispersed phase and a strong oil-water adsorption boundary layer oil emulsions have a higher viscosity, that causes serious complications during oil recovery and collection, and the presence of natural surfactants in the oil gives the majority of emulsions a high resistance. The degree of de-emulsification depends on many technological factors, the main of which is the addition of demulsifiers during thermochemical dehydration of oil. At the same time, it should be noted that the use of demulsifiers is a necessary, but not a sufficient condition for high-quality oil treatment, for this it is necessary to create a highly efficient technology as a process in general. One of the directions of the complex approach can be the use of composite demulsifiers at all stages of the technological process. This approach should be based on the study of the mechanisms of the effect of chemical reagents on colloid-chemical properties and the structure of oil disperse systems. The results of this work show that substances with high surface-active and wetting properties intensify the coalescence of water globules during de-emulsification and reduce the strength of the interfacial adsorption layer at the «oil-water» boundary. The combination of surface-active, wetting and rheological properties of composite demulsifiers promotes high adsorption of the reagent on the interphase surface, displacement of emulsion stabilizers from the adsorption layer surface, that leads to the rapid breakage of highly stable water-oil emulsions.
- Subjects
RUSSIA; EMULSION testing; CHEMICAL stability; ADSORPTION capacity; DEMULSIFICATION; OIL fields
- Publication
Journal of Chemical Technology & Metallurgy, 2018, Vol 53, Issue 2, p191
- ISSN
1314-7471
- Publication type
Article