海上油田聚合物驱后残留聚合物性质对再利用效果的影响  

Influence of polymer residue property on EOR after polymer injection for offshore oilfield

作　　者：杨帅[1] 戴彩丽[1] 张健[2,3] 姜维东[2,3] 张艳辉[1] 闫立朋[1] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266555 [2]海洋石油高效开发国家重点实验室,北京100027 [3]中海油研究总院,北京100027

出　　处：《油气地质与采收率》2012年第5期65-68,115,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"渤海化学驱油田整体调驱技术研究"(2011ZX05024);山东省杰出青年基金"提高采收率与采油化学"(JQ201013);山东省"泰山学者"建设工程(TS20070704)

摘　　要：针对渤海绥中36-1油田地层残留疏水缔合聚合物具有高水解度、低特性粘数的特点,开展了残留聚合物再利用室内实验研究。应用原子力显微镜探究了地层残留聚合物再利用剂提高采收率机理,并通过物理模拟实验测定了残余阻力系数和采收率增值,研究了残留聚合物水解度和特性粘数的变化对地层封堵性能和采收率增值的影响。结果表明,低特性粘数和高水解度的残留聚合物与再利用剂作用可使其对地层的封堵作用显著提高,残余阻力系数可达20以上,其中特性粘数越低,水解度越高,残余阻力系数越大,封堵作用越强。提高采收率增值实验结果表明,残留聚合物与再利用剂作用后比单纯聚合物驱的采收率提高了8.9%,可视化模拟结果也证实了此观点。As the hydrophobically associating polymer in Bohai Suizhong 36-1 reservoir has the character of high degree of hydrolysis and low intrinsic viscosity,laboratory has carried out the residual-recycled experiments to investigate the sealing characteristics with the changes in degree of hydrolysis and intrinsic viscosity. Residual resistance factor and recovery appreciation are determined by the physical simulation method, to study the effect of formation sealing performance and recovery evaluation by the change of polymer degree of hydrolysis and intrinsic viscosity. The results of laboratory experiments indicates that the sealing characteristics of the interacted production which originates from the reaction of residual polymer with high degree of hydrolysis and low intrinsic viscosity and recycled agent is much better than the single polymer with the residual resistance factor reaching more than 20,which lowers the intrinsic viscosity,that is, the higher the degree of hydrolysis, the better the sealing performance. The enhanced oil recovery experiments also indicate that the method can improve the recovery by 9. 4% . The result of visualized simulation experiment also validates the viewpoint.

关 键 词：残留聚合物 特性粘数 水解度 再利用 提高采收率 

分 类 号：TE357.431[石油与天然气工程—油气田开发工程]