亚铁离子对驱油聚合物溶液黏度的影响及其降黏机理  

Effect of Ferrous Ion on Reducing the Viscosity of Oil Flooding Polymer Solution and Its Mechanism

作　　者：黄漫 李美蓉 田兰兰 黄银 马宝东[2] 刘坤[2] 

机构地区：[1]中国石油大学(华东)理学院,青岛266580 [2]中国石化胜利油田地质科学研究院,东营257015

出　　处：《应用化学》2013年第12期1399-1403,共5页Chinese Journal of Applied Chemistry

基　　金：国家重大专项(2011zx05011-004)高温高盐油田化学驱提高采收率技术;国家重大科技专项基金(2008ZX05011);国家"八六三"(2008AA092801)资助项目

摘　　要：采用NaOH沉淀法去除胜坨油田T28区污水含有的亚铁离子(Fe2+),使配制的聚合物溶液黏度增加,通过红外光谱仪(IR)、荧光光谱仪及扫描电子显微镜(SEM)对Fe2+的降黏机理进行了分析。结果表明,采用NaOH沉淀法处理Fe2+含量为5.9 mg/L的污水,控制pH=9,聚合物溶液的黏度可由19.17 mPa·s提高到92.50 mPa·s。Fe2+使聚合物大分子发生断链,分子间的缔合作用减弱,破坏了分子链间形成的空间网络结构,导致溶液黏度显著降低;当用NaOH处理Fe2+后形成了Fe(OH)2沉淀而析出,同时使聚合物分子链间形成致密的空间网络结构。The viscosity of prepared polymer solution was increased by the precipitation of Fe2＋ with NaOH from the sewage of the T28 district, Shengtuo oilfiled. The mechanism of reduced viscosity introduced by Fe2 ＋ was studied by IR, fluorescence spectroscopy and SEM. The viscosity of polymer solution was elevated from 19. 17 mPa.s to 92.50 mPa-s when treating the sewage containing 5.9 mg/L of Fe2＋ with NaOH at pH 9. Fe2＋ was found to split the polymer chain, weaken the association, destroy the spatial network structure of macromolecules, and lead to decreasing viscosity of the polymer solution. The precipitation of ferrous hydroxides from the polymer solution promotes the formation of compact spatial network structure of the polymer chains.

关 键 词：聚合物 亚铁离子 黏度 机理 

分 类 号：O631.1[理学—高分子化学]