摘要
应用CT扫描技术研究聚合物驱过程中水解聚丙烯酰胺(HPAM)和酚醛交联聚合物溶液与储层渗透率之间的匹配关系,分别将不同质量浓度的交联聚合物溶液注入3类不同渗透率的天然岩心进行驱替实验。结果表明:对于储层渗透率高于1μm^2的作业层,可以选用HPAM质量浓度为1 500 mg/L、酚醛质量浓度为800 mg/L的交联聚合物体系,其注入过程顺利,不会发生堵塞现象,与储层适应性良好;对于渗透率在0.3~1.0μm^2范围的作业层,可以在考虑矿场实际的基础上酌情选用HPAM质量浓度为1 500 mg/L、酚醛质量浓度200~400 mg/L的交联聚合物体系;渗透率在0.3μm2以下的作业层与交联聚合物匹配性很差,注入过程中岩心的大部分区域发生严重堵塞,建议直接采用聚合物进行作业。
The polymer solution with different mass concentrations is injected into 3 kinds of natural cores of different permeability to study the matching relationship between the cross-linked polymer solution of hydrolyzed polyacrylamide( HPAM) with phenolic aldehydethe and reservoir permeability in cross-linked polymer flooding process using CT scanning technique. The experimental results show that: for the reservoirs whose permeability is higher than 1 μm2,the cross-linked polymer solution of 1 500 mg/L HPAM and 800 mg/L phenolic aldehyde can be smoothly injected,it has good adaptability to the reservoirs,and reservoir plugging phenomenon will not occur;for the reservoirs whose permeability is in 0. 3 ~ 1. 0 μm^2,the cross-linked polymer solution of 1 500 mg/L HPAM and 200 ~ 400 mg/L phenolic aldehyde can be used according to field practice; for the reservoirs whose permeability is lower than 0. 3 μm^2,the reservoirs will be plugged in the cross-linked polymer flooding process,therefore it is suggested to apply polymer flooding.
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2015年第6期72-77,10,共6页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
国家科技重大专项"油田开采后期提高采收率技术"(编号:2011ZX05009-004)
国家示范工程"大庆长垣特高含水油田提高采收率示范工程"(编号:2011ZX05052)
关键词
聚合物驱
交联聚合物浓度
储层渗透率
CT扫描技术
polymer flooding
cross-linked polymer concentration
reservoir permeability
CT scanning technique
