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采用大庆采油二厂、大庆采油四厂脱气原油和表面活性剂ＯＲＳ４１（美国进口）及ＮａＯＨ，Ⅱ型，Ⅲ型络合剂，以及采油二厂污水、采油四厂杏五三元复合驱采出水进行了复合体系的界面活性实验。在油田污水中添加Ｉ型络合剂后，配制体系的界面张力由原来７．７×１０２ｍＮ／ｍ降到１０－３～１０－４ｍＮ／ｍ数量级。当Ⅱ型络合剂质量浓度为１００～１５０ｍｇ／Ｌ或Ⅲ型络合剂质量浓度为１００ｍｇ／Ｌ或１５０ｍｇ／Ｌ时，采出水体系的界面张力下降幅度最大。其原因在于添加少量含磷有机物后，能生成稳定的络合物，减少了非表面活性物质生成和进入界面的几率。建议使用含磷有机物质或与无机磷酸盐复配。
Using Daqing Oil Production Plant, Daqing Oil Production Plant degassed crude oil and surfactant ORS 41 (US imports) and NaOH, â ... ¡, â ... ¢ type complexing agent, as well as the second plant effluent, oil plant apricot five three yuan complex Flooding produced water for the composite system of interface activity experiments. After adding Type I complexing agent into oilfield wastewater, the interfacial tension of the preparation system is reduced from the original 7.7 × 10 -2 mN / m to 10-3-10-4 mN / m. When the type II complexing agent concentration is 100-150mg / L or the type III complexing agent concentration is 100mg / L or 150mg / L, the interfacial tension of the produced water system has the largest decrease. The reason is that adding a small amount of phosphorus-containing organic compounds, can generate stable complexes, reducing the non-surfactant generation and the probability of entering the interface. It is recommended to use phosphorus-containing organic substances or complex with inorganic phosphate.