高频脉冲原油脱水技术在页岩油处理中的应用

Application of High Frequency Pulse Crude Oil Dehydration Technology in Shale Oil Treatment

吉木萨尔页岩油是新疆油田公司近年来发现的两个10亿吨级大油田之一。页岩油凝点高,乳化程度高,采用常规的热化学脱水工艺存在处理难度大、处理流程长、处理能耗高等问题。通过高频脉冲脱水工艺的研究与应用,页岩油可实现密闭、高效、低成本处理。油井采出液经过油气分离后,进入高频脉冲处理装置内,先经过电磁辐射降黏,再经过高频脉冲破乳,最后经过高频电场聚结脱水,在脱水温度50℃、破乳剂质量浓度50 mg/L的条件下,处理后的页岩油含水率达到0.5%以下,出水含油量质量浓度控制在500 mg/L以下。高频脉冲处理技术将常规的常压多级沉降处理工艺优化简化成一级密闭处理工艺,实现了动态交油,降低了处理能耗,吨液处理耗电量是常规电脱装置的50%。

Jimsar shale oil is one of the two 1 billion ton oil fields discovered by Xinjiang Oilfield Company in recent years.Shale oil has high freezing point and high emulsification degree.The conven-tional thermochemical dehydration process has some problems such as being difficult to deal with,re-quiring long treatment process,and having high energy consumption.Through research and application of the high frequency pulse dehydration process,shale oil can be treated in a closed,efficient and low cost way.After oil and gas separation,the produced fluid of oil well enters into the high-frequency pulse processing device.First,the viscosity is reduced by electromagnetic radiation,then the emulsion is demulsified by high-frequency pulse,and finally coalesced and dehydrated by high-frequency elec-tric field.Under the condition of dehydration temperature of 50℃and demulsifier mass concentration of 50 mg/L,the water content of shale oil after treatment is less than 0.5%,and the mass concentration of the effluent oil content is controlled below 500 mg/L.High-frequency pulse processing technology simplifies the conventional atmospheric pressure multi-stage sedimentation treatment into one-stage closed treatment process,realizes dynamic oil delivery and reduces the treatment energy consumption.The power consumption per ton of liquid treatment is 50%of that of the conventional electric dehydra-tion device.