摘要
通过考察电场参数对吉林油田W/O型乳状液中水颗粒聚结效果的影响,发现了高频脉冲交流电场的脱水规律:脱水率随脉冲频率的增大呈现先增大而后减小的趋势,当脉冲频率达到4.43kHz时,达到峰值;脱水率随脉冲幅度的增大亦呈现先增大后减小的趋势,当脉冲幅度为1320V时,达到峰值;脱水率随脉宽比的增大逐渐增大,当脉宽比为85%时,达到最大值。破乳剂可以缩小高频脉冲电场对乳状液的破乳脱水范围,包括降低最佳脉冲频率和脉宽比,但破乳剂对最佳脉冲幅度没有影响。吉林油田原油乳状液的最佳破乳参数:脉冲频率为3.86kHz,脉冲幅度为1320V,脉宽比为75%,PR929破乳剂加量为60mg/L,脱水温度为55℃,脱水时间为10min,此时,W/O型乳状液脱水率接近100%。
Effects of pulse frequency,pulse amplitude and pulse width ratio on the coalescence of water particles in W/O emulsions of Jilin Oilf ield were investigated,which is helpful for understanding the mechanisms of high-frequency pulsed AC electrical f ields on dehydration rate.The dehydration rate with the increase of pulse frequency increased and decreased,and 4.43 kHz was a peak,dehydration rate with the increase of pulse amplitude varied in a similar tendency,and 1320 V was a peak,dehydration rate increased with the increase of pulse width ratio whose maximum value was at 85%.Adding demulsifier to high-frequency pulsed AC electrical field made it easier to implement best demulsification with lower optimal pulse frequency and pulse width ratio,while the optimal pulse amplitude was not affected.The experimental results showed that under the conditions of dehydration temperature 55 ℃,duration time 10 min and 60 mg/L PR929 added,pulse frequency 3.86 kHz,pulse amplitude 1320 V,pulse width ratio 75%,the dehydration rate of the high-frequency pulsed AC electrical fields reached nearly 100%.
出处
《油气储运》
CAS
北大核心
2011年第10期771-774,717,共4页
Oil & Gas Storage and Transportation
基金
国家自然科学基金资助项目"基于自组织行为的特定两亲聚合物驱油剂溶液的流变动力学研究"
20873181
山东省自然科学基金资助项目"基于自组织行为的两亲聚合物的自乳化驱油研究"
Y2008F20
山东省泰山学者建设工程资助项目
TS20070704
关键词
W/O
乳状液
高频脉冲交流电场
电场参数
破乳剂
含水率
脱水率
water-in-oil emulsion,high-frequency pulsed AC electrical f ields,f ield parameter,demulsif iers,water content,dehydration rate
