高效复合稠油降黏剂的优选及性能评价  

Optimization and performance evaluation of high efficiency compound heavy oil viscosity reducer

作　　者：郑旭 ZHENG Xu(Tianjin Branch of CNOOC,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《能源化工》2020年第6期45-48,共4页Energy Chemical Industry

基　　金：国家科技重大专项“大型油气田及煤层气开发”(2011ZX05024)。

摘　　要：针对海上某稠油区块稠油黏度较高、流动性差以及集输难等问题,通过室内试验对不同类型的单一水溶性稠油降黏剂进行了效果评价,筛选出4种性能较好的降黏剂,在此基础上对4种降黏剂进行复配评价,优选出了一种高效复合稠油降黏剂体系,其组成配比为m(HS-3):m(MB-2)=1:1,并评价了该复合降黏剂加量、老化温度以及矿化度对降黏效果的影响。结果表明:优选的复合降黏剂的质量分数为0.5%时,降黏率可达99%以上;该复合降黏剂经过180℃老化后,降黏率仍可以达到99%;使用矿化度为90 g/L的盐水配制复合降黏剂时,降黏率仍可达98%以上,说明该复合降黏剂具有良好的耐温抗盐性能。Aiming at the problems of high viscosity,poor fluidity and difficult gathering and transportation of heavy oil in a offshore heavy oil block,the effect of different types of single water-soluble heavy oil viscosity reducer is evaluated in the laboratory,and the viscosity reducers with better performance are selected.On this basis,the compound evaluation of different viscosity reducers is carried out,and an efficient compound heavy oil viscosity reducer system is optimized,of which the mass ratio of HS-3 to MB-2 is 1:1.The effect of the dosage of compound viscosity reducer,aging temperature and mineralization degree on the viscosity reduction efficiency is investigated.The results show that the viscosity reduction rate can reach up to more than 99%when the mass fraction of optimized compound viscosity reducer is 0.5%,the viscosity reduction rate can still reach up to 99%after aging at 180℃,the viscosity reduction rate can reach up to more than 98%by using salt brine with mineralization of 90 g/L compounding with the compound viscosity reducer,which indicates the compound viscosity reducer has better temperature and salt resistance performance.

关 键 词：稠油 降黏剂 复合 性能评价 降黏率 

分 类 号：TE39[石油与天然气工程—油气田开发工程]