基于黏土+表面活性剂协同乳化的采出液高频电脉冲脱水机理研究  

Study on the Mechanism of High-frequency Electric Pulse Dehydration of Produced Fluid Based on the Synergistic Emulsification of Clay and Surfactant

作　　者：刘鑫成 杨文武 曹广胜[1] 张宁 白玉杰[1] 李丹[1] LIU Xin-cheng;YANG Wen-wu;CAO Guang-sheng;ZHANG Ning;BAI Yu-jie;LI Dan(Key Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education,Northeast Petroleum University,Daqing Heilongjiang 163318,China;Daqing Oil Field Co.,Ltd.Exploration and Development Research Institute,Daqing Heilongjiang 163318,China)

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]大庆油田有限责任公司勘探开发研究院开发一室,黑龙江大庆163000

出　　处：《当代化工》2023年第6期1462-1467,共6页Contemporary Chemical Industry

基　　金：国家自然科学基金,活性原油在非均质储层中的自适应控水增油机理(项目编号:51574089)。

摘　　要：在高频脉冲电场下,通过控制变量法对电场强度、频率、时间等因素进行合理改变,得出其对电场脱水效果的影响规律。向油水混合溶液中加入乳化剂和黏土,判断乳化剂和黏土对电场脱水效果造成的影响。从实验结果中可以得到存在最佳的电场强度为6 kV,最佳电场频率为2 kHz。随着外施电场强度增加,脱水率逐渐增高,当外施电场强度超过水滴临界破裂电场强度时,脱水率有所下降,且脱水电场不稳定;当外施电场频率使水滴达到共振时水滴振幅最大、脱水效果最好。随着施加电场时间的增加和温度的升高,脱水率逐渐增加,并且都在达到一定数值后脱水率变化极小或不变。加入乳化剂后脱水率减小,并且在乳化液中加入黏土后脱水率降低幅度更大,说明形成了黏土+乳化剂的协同乳化体系。当加入黏土质量超过一定质量后,脱水率围绕一定数值上下波动,不会产生很大的变化;在加入破乳剂后,脱水率上升并达到最大值。Under the high-frequency pulsed electric field,the electric field strength,frequency,time and other factors were reasonably changed by the control variable method,and the law of its influence on the dehydration effect of the electric field was obtained.The emulsifier and clay were added to the oil-water mixed solution to determine the influence of the emulsifier and clay on the dehydration effect of the electric field.The experimental results showed that the optimum electric field strength was 6 kV,and the optimum electric field frequency was 2 kHz.With the increase of the applied electric field strength,the dehydration rate gradually increased.When the applied electric field strength exceeded the critical breaking electric field strength of the water droplet,the dehydration rate decreased,and the dehydration electric field was unstable;when the applied electric field frequency made the water droplet reach resonance,the droplet amplitude was the maximum,the dehydration effect was the best.With the increase of the applied electric field time and temperature,the dehydration rate gradually increased,and the dehydration rate changed little or did not change after reaching a certain value;the dehydration rate decreased after adding the emulsifier,and after clay was added to the emulsion,the post-dehydration rate decreased more greatly,indicating that a synergistic emulsification system of clay and emulsifier was formed;when the clay mass exceeded a certain quality,the dehydration rate fluctuated around a certain value and did not change greatly;after adding the demulsifier,the dehydration rate rose and reached the maximum value.

关 键 词：高频电脉冲脱水 电场强度 黏土 协同乳化 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]