不同破乳剂对老化油脱水处理的适应性评价

Adaptability Evaluation of Different Chemical Demulsifiers on Dehydrating of Aging Crude Oil

油田中的老化油是指积存时间长、硫化亚铁等大量滋生而难以处理的原油。结合大庆榆树林油田集输工区"两段式"处理工艺,针对落地油、提捞油等复杂性质采出液进入电脱水系统时,电脱水器频繁跳闸而影响正常生产的问题,开展了不同破乳剂对老化油脱水处理的适应性实验研究,室内评价结果表明,用剂的适配性一方面直接关系到净化油含水率和脱后污水的含油量指标,另一方面也对电脱段脱水电流的高低有影响;非离子油溶性EC2020A牌破乳剂在(30～50)mg/L的用量下,能分别使掺混1.5%比例落地油、50%比例提捞油的采出液脱后含水低于0.5%,污水含油低于500mg/L,且使脱水电流维持在100mA以内,有助于缓解电-化学脱水中电场的冲击作用。

The aging crude oil of oil fields is the oil over a long time and has a large number of breeds such as FeS, which is difficult to deal with. When the recovery fluid of complex nature such as ground raw oil, bailing oil into the electric dehydration system, the electric dehydration devices have frequent tripping and affect the normal production. According to＂two-stage＂ process in Daqing Yushulin Oilfield gathering station, the experiment about adaptability evaluation on different chemical demulsifiers on dehydrating of aging oil is carried out. Indoor evaluation results show that, on the one hand the adaptation of agent directly related to moisture content of oil purification and oil indicators of wastewater after dehydration, on the other hand related to the level of electric current in electric dehydration. Non-ionic oil-soluble demulsifier licensing EC2020A with the adding amount of （40 -50） mg/L,can respectively make the liquid recovery mixing ratio of 1.5% ground oil, 50% of the proportion of bailing oil has less than 0.5% moisture content, sewage oil below 500mg/L after dehydration and dehydration electric current maintained at less than 100mA ,which is helpful for easing the impact of electric field in electro-chemical dehydration.