摘要
BS-9为聚氧乙烯(20)鲸蜡醇醚与十二烷基硫酸钠及助剂的混合物,由表面张力曲线测得蒸馏水溶液25℃下临界胶束浓度为7×10-5mol/L。黏度(50℃)24.1Pa.s的胜利陈庄特稠油与0.1%的BS-9蒸馏水溶液以体积比8∶2、7∶3、6∶4、5∶5混合形成的乳状液,其黏度比稠油降低73.03%、87.55%、89.13%、80.17%,静置1小时后(50℃)脱水率为82%、96%、88%、98%;当BS-9质量分数增至0.15%,油水体积比为7∶3和6∶4时,稠油乳化降黏率大幅增至96.31%和98.22%,静置1小时脱水率则有所减小(73%和60%),用含Ca2+、Mg2+各0.2g/L、矿化度10g/L的矿化水配制的0.1%BS-9溶液,在油水体积比为8∶2、7∶3、6∶4、5∶5时对稠油的乳化降黏率与0.1%BS-9蒸馏水溶基本相同;BS-9在矿化水溶液中的质量分数增至0.15%时,除油水体积比8∶2时对稠油的乳化降黏率有所增大外,乳化降黏效果并无改善。BS-9溶液逐步加热至90℃未见浑浊。BS-9可用于高矿化度、高钙镁条件下稠油的乳化降黏开采。
BS-9,being a mixture of cetyl alcohol polyoxyethylene（20） ether and dodecyl sulfate with auxiliaries added,had CMC value 7×10^-5 mol/L in distitlled water（DW） at 25℃ as determined by surface tension measurements. The Chenzhuang extra viscous crude oil of viscosity 24.1 Pa·s（50℃） and 0.1% BS-9 solution in DW at volume ratio（OWVR） 8：2,7：3,6：4,and 5：5 were mixed and formed emulsions of viscosity reduced by 73.03%,87.55%,89.13%,and 80.17% in comparision with original crude oil and a percentage water separation（PWS） of 82%,96%,88%,and 98%,respectively,was observed for these emulsions in 1 hour standing at 50℃; at an increased BS-9 mass fraction 0.15% in DW solution and at OWVR=7：3 and 6：4,the percentage viscosity reduction（PVR） was raised significantly to 96.31% and 98.22% and the PWS was lowered to 73% and 60%,respectively. For 0.1% BS-9 solution in salt water of TSD=10 g/L and concentration of Ca^2＋ 0.2 and of Mg^2＋ 0.2 g/L at OWVR=8：2,7：3,6：4,and 5：5,the PVR values were similar to that for 0.1% BS-9 solution in DW while at BS-9 mass fraction in solution increased to 0.15% the PVR values were not raised further besides of that the PVR value at OWVR=8：2 became larger. No clouding appeared in BS-9 solution at heating gradually to 90℃. BS-9 was suggested as emulsifier for viscosity reduction of viscous heavy crude oils in media of high salinity and high calcium/magnesium concentration.
出处
《油田化学》
CAS
CSCD
北大核心
2010年第1期81-83,25,共4页
Oilfield Chemistry
基金
国家自然科学基金"油水界面上聚合物/表面活性剂自组织行为机制的介观模拟研究"(项目编号20803069)
关键词
复配表面活性剂
鲸蜡醇聚氧乙烯醚
十二烷基硫酸钠
特稠油
乳化降粘
乳状液
黏度
稳定性
胜利陈庄油田
combinational surfactant
cetyl alcohol polyoxyethylene ether
dodecyl sulfate
extra heavy crude oil
viscosity reduction by emulsification
emulsions
viscosity
stability
Chenzhuang crude oil
