【摘要】 MD膜驱油现场试验中发现采出的含油污水有逐渐变清的趋势。实验考察了MD 1膜驱剂 (一种单分子双季铵盐 )对油田采出水的zeta电位、脱油率和水包油乳状液的脱水率的影响 ,结果表明 ,MD 1在水中电离生成的阳离子压缩双电层 ,zeta电位随着MD 1浓度的增加而增加 ,压缩双电层是渐进过程 ;MD 1对油田采出水的破乳作用随MD 1浓度增加而增加并且与采出水的含油量有关 ,含油量低时破乳脱油效果不佳 ;由阴离子表面活性剂ORS 4 1和非离子表面活性剂OP 10为乳化剂形成的水包油乳状液 (油相为含 1%胶质和沥青质的煤油 ) ,其脱水率均随MD 1浓度的增加而增加 ,但在乳化剂为OP 10时脱水率较低 ;MD 1膜驱剂与油相中的胶质及沥青质作用 ,破坏油水界面致使油滴聚并、破乳。图 7表 2参 11更多还原

【Abstract】 The tendency of produced oily water (POW) to become clearer gradually was observed in a field molecular deposition filming flooding (MDFF) trial. The effects of MDFF agent MD 1, an organic diammonium salt, on zeta potential and deoiling rate of POW and dehydration rate of a simulation high water cut crude oil (O/W emulsion) are investigated experimentally and it is shown that: the cations from MD 1 cause contract of the electric double layers in aqueous solution in a progressive way and the zeta potential increases with increasing MD 1 concentration in POW; the demulsification efficiency of MD 1 is enhanced with increasing MD 1 concentration and is influenced by oil content in POW: the deoiling rate is higher when POW contains more oily substances for O/W emulsions with kerosene containing 1% resins and asphaltenes as oil phase and formed with anionic surfactant ORS 41 or nonionic surfactant OP 10 as emulsifier, the dehydration rate increases with increasing MD 1 concentration and is lower in the case of using OP 10 as emulsifier, which indicates that MD 1 reacts with resins and asphaltenes, destrogy interfaces between oil and aqueous phases and thus causes coalescence of oil droplets and breaking down of O/W emulsions.更多还原