Study of influence of demulsifiers on complex in rheology oil dehydration kinetics

• Main Authors: Gafar G. Ismaiylov, Esen I. Izbasarov, Mekhpara B. Adygezalova, Ruslan Z. Khalilov
• Format: Article
• Language: English
• Published: Perm National Research Polytechnic University 2017-06-01
• Series: Perm Journal of Petroleum and Mining Engineering
• Subjects: oil treatment; water; water-oil emulsion; viscosity; density; chemical agents; dehydration; demulsifier; surface active agent; kinetics; chloride salts; rheological properties; physical and chemical properties; chemical composition; efficient dosage; agent consumption
• Online Access: http://vestnik.pstu.ru/get/_res/fs/file2.pdf/6593/Study+of+influence+of+demulsifiers+on+complex+in+rheology+oil+dehydration+kineticsfile2.pdf

One of the relevant challenges in development of oil fields is a challenge to increase efficiency of oilfield treatment of hydrocarbons. Solution for that challenge can significantly improve level of oil treatment, reduce hydrocarbon losses with drainage water and thereby improve ecology of the environment and make additional profit for an enterprise. A system of gathering and treatment of water and oil of Karazhanbas field, influence of surface active agents (surfactants) on water-oil emulsions under conditions of the field are studied in the paper. In addition, a chemical demulsifier which has the most efficient properties for field treatment of well production at Karazhanbas field is chosen. Results of laboratory studies of water-oil emulsion, physical and chemical analysis of water composition and new chemical demulsifiers, recommended for pilot tests at Karazhanbas field, are presented. Analisys of results of laboratory studies shows that all test chemicals are inferior to a base demulsifier Randem-2208 by a degree of dehydration. Base demilsifier is inferior to demulsifiers Victory-2, 3 and Rauan-2050 by a degree of desaltation. It is established that demulsifier Victory-1 in comparison with base and other demulsifiers does not show a high demulsifying ability. In coparison with base Randem-2208 demulsifier Victory-2 showed the lowest demulsifying ability with degree of dehydration equal to 60.67 %. In comparison with the base product Randem-2208 demulsifier Victory-3 provides quite good dehydration. Compared to base demulsifier Randem-2208 demulsifier Rauan-2050 has a good demulsifying ability, consumption of demulsifier decreases with increase in water saturation in oil. At the same time, goal-based increase in water saturation of prepeared rheologically complex oil to its ultimate value allows to reduce consumption of demulsifier in several times with no reduce in efficiency oil dehydrationl.