高含硫重质原油脱水用破乳剂SHD

DEMULSIFIER SHD FOR DEHYDRATION OF HIGH SULFIDE HEAVY VISCOUS CRUDE OIL

华北油田某油区原油属高含硫重质稠油，采出液形成了稳定的油水乳状液，采用常规的破乳剂无法正常进行破乳脱水。根据破乳剂之间的协同效应原理，研制了 Ｓ Ｈ Ｄ 破乳剂并投入了现场应用。该破乳剂对高含硫重质稠油脱水快、脱水率高、脱出污水清，保证了原油脱水生产的正常运行。

The crude oil produced in region x of Huabei Oil Fields is heavy (density at 20℃ 0.961-0.992 g/cm 3), viscous (viscosity at 50℃ 708-13100 mPa·s), of high sulfide(4.28-8.27%) and resin asphaltenes(32.7-60.8%) contents and thus is difficult to dehydrate. On the basis of experimental data for 19 single commercial crude oil demulsifiers of different molecular structure and by using synergetic principles, a combinational demulsifier, SHD, is developed for the aimed crude oil and is evaluated in laboratory to seek for the optimum use level at given dehydrating temperatures. The water cut of the produced crude decreases from～30% to 4% after having been sedimentated at 45℃ in the tank. Such crude is transported by car to the gathering plant for further dehydration by an electric chemical way.