加拿大稠油油田油溶性降黏剂的制备及性能评价  

Preparation and performance evaluation of oil soluble viscosity reducer for heavy oil fields in Canada

作　　者：肖洒[1] 孙玉豹[1] 王少华[1] 吴春洲[1] 舒展 Sa Xiao;Yubao Sun;Shaohua Wang;Chunzhou Wu;Zhan Shu(Oilfield Production Department,China Oilfield Services Limited,CNOOC,Tianjin 300459,China)

机构地区：[1]中海油田服务股份有限公司油田生产研究院,天津300459

出　　处：《日用化学工业》2021年第9期832-838,共7页China Surfactant Detergent & Cosmetics

摘　　要：加拿大M油田油藏温度低,油藏埋深浅,原油黏度高,含水少,流动性差,针对M油田稠油特性,研制了油溶性降黏剂PH-OV。实验研究表明:油溶性降黏剂PH-OV的较优组成为4%酯化改性聚醚+15%二乙二醇二丁醚+81%芳烃类溶剂油,PH-OV质量分数达到3%时,对M油田稠油降黏率可达到85.2%;加量达到5%以上时,在14~80℃内的降黏率均可达到80%以上。随着原油含水率的增高,降黏率随之增大,60%含水率时降黏率达到98.5%。该降黏剂可有效降低原油屈服值,对原油降黏性能稳定可达168 h以上,辅助冷水驱油效率可达到30.03%,相比水驱冷采提升了12.86%。油溶性降黏剂PH-OV可适用于M油田稠油冷采,具备有效实施提高采收率的潜力。M oilfield in Canada is characterized by low temperature,shallow buried depth,high viscosity of crude oil,less water cut and poor fluidity.Due to the high content of resin and asphaltene,it is very difficult to recover the crude oil by conventional mining method.It is necessary to reduce the viscosity of the crude oil from M oilfield in Canada.Oil soluble viscosity reduction technology has stable viscosity reduction effect on heavy oil and saves the steps of produced fluid demulsification and dehydration.In recent years,the research on oil soluble viscosity reducer at home and abroad has developed rapidly.Due to the great differences in the composition and characteristics of heavy oil in different regions,the adaptability to oil soluble viscosity reducer is different.According to the characteristics of heavy oil in M oilfield,an oil soluble viscosity reducer PH-OV was developed.The results show that the optimum composition of PH-OV is 4%esterified polyether+15%diethylene glycol dibutyl ether+81%aromatic solvent oil.When the dosage of PH-OV is 3%,the viscosity reduction rate can reach 85.2%;when the dosage of PH-OV is more than 5%,the viscosity reduction rate can reach more than 80%within 14-80℃.The SEM chart show that the viscosity reducer PH-OV can effectively destroy the aggregation structure of crude oil,disperse resin and asphaltene,inhibit the formation of macromolecular aggregates and reduce viscosity.With the increase of water content of crude oil,the viscosity reduction rate increases.When the water content is 60%,the viscosity reduction rate reaches 98.5%.The viscosity reducer can effectively reduce the yield value of crude oil,and the viscosity reduction performance of crude oil can be stable for more than 168 h.With the increase of viscosity reducer,the yield value of crude oil decreases significantly,which can effectively reduce the initial starting pressure of crude oil.The efficiency of PH-OV assisting cold water flooding can reach 30.03%,which is 12.86%higher than that of cold water flooding.The

关 键 词：稠油 油溶性降黏剂 屈服值 冷采 

分 类 号：TE357[石油与天然气工程—油气田开发工程]