Experimental Research on Chemical Demulsification for Emulsified and Visbreaking Heavy Oil in Z-70 District of Huabei Oilfield

Abstract

Abstract: The visbreaking of heavy oil is the key technology for the heavy oil development and gathering. However, it will bring some new challenges to its following demulsification and dehydration treatment. This paper selects the typical heavy oil emulsion as the basis for chemical demulsification and adopts light scattering-based automatic detection method to evaluate and analyze the real-time dynamic dehydration speed and rate systematically. In contrast with traditional bottle-test method, by the new method the efficiency and accuracy can be improved greatly. The oil content ratio of dehydration and the water content ratio of purified oil are evaluated, indicating that the heavy oil system after visbreaking treatment followed by chemical demulsification and dehydration is suitable for field requirement.

Key words: heavy oil, chemical demulsification, visbreaking, bottle-test method, stability analysis, oil content ratio, water content ratio

CLC Number:

TE345

GUO Ying, LIANG Jin-lu, LUO Jian-hui, DING Bin, WANG Ping-mei. Experimental Research on Chemical Demulsification for Emulsified and Visbreaking Heavy Oil in Z-70 District of Huabei Oilfield[J]. Xinjiang Petroleum Geology, 2011, 32(1): 77-79.

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Experimental Research on Chemical Demulsification for Emulsified and Visbreaking Heavy Oil in Z-70 District of Huabei Oilfield

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