The research and evaluation of fracturing demulsification cleanup agent

Four kinds of reagents were screened by studying different types of surfactants, an demulsion cleanup agent with low surface tension and low interfacial tension are obtained with mixeding. In accordance with the requirements for its density, freezing point, emulsion-breaking rate and compatibility, some experiments were made and at last a surface active solution with excellent demulsification cleanup effect was obtained, and especially for its low price in similar products, with superior bihaviour. Measured by experiment: surface tension of 25.6mN/m, interfacial tension 0.8mN/m, freezing point-30 ℃, emulsion-breaking rate of ≥ 96%, compatibility ≥ 100mPa·s.