温敏型聚合物驱油性能研究  

Study on oil displacement performance of temperature sensitive polymer

作　　者：徐辉[1] 祝仰文[1] 宋敏[2] 庞雪君[1] 孙秀芝[1] XU Hui;ZHU Yangwen;SONG Min;PANG Xuejun;SUN Xiuzhi(Research Institute of Exploration and Development,Sinopec Shengli Oilfield,Dongying,Shandong 257015,China;Oil and gas development management Center,Sinopec Shengli Oilfield,Dongying,Shandong 257000,China)

机构地区：[1]中国石化胜利油田分公司勘探开发研究院,山东东营257015 [2]中国石化胜利油田分公司油气开发管理中心,山东东营257000

出　　处：《油气藏评价与开发》2020年第6期53-57,64,共6页Petroleum Reservoir Evaluation and Development

基　　金：国家科技重大专项“高温高盐油田化学驱提高采收率技术”(2016ZX05011-003)。

摘　　要：为了改善聚丙烯酰胺在高温高盐油藏条件下溶液的增黏性能,常用的方法是在合成过程中引入缔合类和抗盐类单体,但随着单体合成技术的发展,出现了一些温敏型共聚物,目前对这类聚合物驱油性能的研究较少。为此选择了常规AM-NaAA二元共聚物和AM-NaAA-RTM温敏型三元共聚物,对比了两种聚合物的基本物化性能、增黏性、耐温性和黏弹性,结果表明,引入温敏型单体后,温度低于60℃时,AM-NaAA-RTM共聚物黏度随温度的增加仍然降低,但在温度高于60℃时,黏度随温度的增加逐渐提高,在85℃时,AM-NaAA-RTM共聚物的黏度相对AM-NaAA二元共聚物提高1倍以上,有利于高温油藏扩大波及体积,且AM-NaAA-RTM共聚物黏弹模量高于常规AM-NaAA聚合物,因此,温敏型聚合物驱油效果好于常规AM-NaAA聚合物,有望应用在高温高盐油藏化学驱中。In order to improve the viscosity-increasing performance of polyacrylamide solution in high temperature and high salt reservoir,the common method is to introduce association and salt-resistant monomer in the synthesis process.However,with the development of monomer synthesis technology,some temperature-sensitive copolymers appear.At present,there are few researches on the oil displacement performance of these polymers.For this reason,conventional binary copolymer AM-NaAA and temperature sensitive terpolymer AM-NaAA-RTM have been selected,and the basic physico-chemical properties,viscosity enhancement,temperature resistance and viscoelasticity of the two polymers have been compared.The results show that after the introduction of temperature sensitive monomers,when the temperature is below 60℃,with the rise of temperature,the viscosity of AM-NaAA-RTM decreases;but when the temperature is above 60℃,its viscosity increases with the rise of temperature;while at 85℃,the viscosity of AM-NaAA-RTM is more than double that of AM-NaAA,which is conducive to expanding swept volume of high temperature reservoirs.In addition,the viscoelasticity modulus of AM-NaAA-RTM is higher than that of AM-NaAA.Therefore,the oil flooding effect of temperature-sensitive polymer is better than that of conventional AM-NaAA polymer,which is expected to be applied in chemical flooding of high temperature and high salt reservoirs.

关 键 词：聚合物驱 温敏三元共聚物 黏弹性 驱油效率 渗流运移性能 

分 类 号：TE357[石油与天然气工程—油气田开发工程]