Abstract: The demulsification of high paraffinic content crude oil from the South Sea were explored by 3 kinds of different molecule weight nitrogenous polyether demulsifiers (PRO7501X,X=A,B or C) with a traditional bottle test. The influences of types, concentration and molecule weight of the demulsifiers on demulsification properties were discussed in detail. Through on-site pilot and dosing point transformation, the actual dehydrated water purification ability of demulsifier PRO7501B in the scene actual was investigated. Experimental results show that PRO7501X performed higher interface activity than the field usage demulsifier under the action of 10 min. In the experimental range, the demulsification ability was closely related to the molecule weight of demulsifier. The Dehydration rate was improved with the increase of demulsifiers concentration, and tends to be stable at the demulsifiers concentration of 15 mg/L. After the onsite pilot, PRO7501B can decrease the water percent in oil of separator PV103 from the initial 11.0%~15% to 0.2%~1.0% and decrease the oil content in water phase from 30~35 mg/L to below 3 mg/L, which can basically resolve the problem of the oil film in the sea.

Key words: Demulsifiers, Nitrogencontaining polyether, Paraffinic containing crude oil, Demulsification, Water purification

摘要： 采用传统瓶试法测定了3种不同相对分子质量的含氮聚醚型破乳剂( P RO 7 5 0 1 X, X=A、 B或C) 对
南海某高含蜡原油破乳脱水净水的能力, 考察了破乳剂种类、 破乳剂相对分子质量、 破乳剂质量浓度等因素对原油
乳状液脱水率的影响。通过现场中试以及加药点改造, 考察了该药剂在现场实际脱水净水的能力。结果表明, 在现
场停留1 0m i n时, 破乳剂P RO 7 5 0 1 X 的脱水速度较快, 其中, 破乳剂P RO 7 5 0 1 B因其相对分子质量适中, 脱水率最
大。在实验范围内, 随着破乳剂P RO 7 5 0 1 B质量浓度的增大, 脱水率逐渐升高, 当质量浓度升高到1 5m g / L时, 脱水
率趋于稳定。对现场中试以及加破乳剂点进行了改造, 检测结果表明, 破乳剂P RO 7 5 0 1 B可以明显降低P - V - 1 0 3分
离器油相出口的含水率, 由原来的1 1. 0%~1 5. 0%降至0. 2%~1. 0%, 处理后外输原油的含水率为2. 5%~3 . 0%, 可
以满足平台的正常生产及外排要求, 水相出口含油的质量浓度从3 0~3 5m g / L降至3m g / L以下, 基本解决海面存
在油膜的问题。

关键词: 破乳剂 ,  含氮聚醚 , 含蜡原油 ,  破乳脱水 , 净水