Development and Application Effect of High-efficiency Demulsifier for GD Oilfield Pro-duced Fluids
The development of GD Oilfield has entered the middle and late stages.With the exploita-tion of weak alkali ASP flooding,the water content and drug content of the produced fluid are increas-ing,the oil and water are easy to emulsify and difficult to separate during the gathering and transporta-tion process.In order to solve this problem,the indoor evaluation experiment of a high-efficiency de-mulsifier is carried out.Based on the orthogonal design experiment,the high-efficiency demulsifier is screened out.According to the screened optimal compound ratio and optimal processing temperature range,the process plan suitable for the treatment of the produced fluids of weak alkali ASP flooding in GD Oilfield is formulated.The results show that demulsifiers DQZY-2C and LJZ-425 have good de-mulsification effects on produced fluids,with dehydration rates of over 90% after 90 minutes settling at 50℃.After further compounding,at a 2∶1 compounding ratio,the synergistic dehydration rate of the two reaches over 93% .As the processing temperature and system water content increase,the demul-sification effect gradually strengthens.After one year of on-site application,the water content of puri-fied oil after dehydration treatment is no more than 1.0%,and the mass concentration of oil in water is no more than 1 000 mg/L,which effectively solves the problem of demulsification for weak alkaline ternary produced fluids in GD Oilfield.
high-efficiency demulsifierproduced fluiddehydration rateprocessing temperature
万方数据
维普
