Open AccessResearch on Basic Properties of Alkali-Surfactant-Polymer Flooding Produced Water and Influence of Oil-Displacing Agent on Settlement
Author(s) -
D Zhang
Publication year - 2020
Publication title -
petroleum and petrochemical engineering journal
Language(s) - English
Resource type - Journals
ISSN - 2578-4846
DOI - 10.23880/ppej-16000242
Subject(s) - settling , pulmonary surfactant , produced water , polymer , residual oil , chemistry , chemical engineering , ternary operation , alkali metal , enhanced oil recovery , petroleum engineering , environmental science , environmental engineering , geology , organic chemistry , computer science , engineering , programming language , biochemistry
The basic properties of alkali‒surfactant‒polymer (ASP) flooding produced water and effect of oil displacing agent on the stability of flooding produced water were obtained, through measuring and analysing water quality, oil content-settling time relationship and oil displacing agent-oil droplet size relationship of Zhong-106, Zhong-312, Zhong-417, Nan 4-8 and Bei 2-7 flooding produced water from Daqing Oilfield. The addition of ternary oil displacement agent to ASP flooding produced water greatly increases the difficulty of oil-water separation, and higher the concentration, worse the separation effect after standing. The effects of alkali, surfactant, and polymer on oil-water stability in simulated ASP flooding produced water were studied respectively. The ASP flooding produced water after 48 hours of settling formed a trace amount of nano-oil droplets, also accompanied by the accumulation and separation of a part of the oil droplets.