中国石油大学学报（自然科学版）Issue(3)：170-176,7.DOI:10.3969/j.issn.1673-5005.2015.03.024
Cr3+聚合物凝胶成胶效果及其影响因素
Study on gelling effect of Cr3+polymer gel and its influence factors
摘要
Abstract
Although high-concentration polymer has strong viscoelasticity, there exist the compatibility problems between pol-ymer molecules aggregate size and reservoir rock pore size during its practical application. According to the geological charac-teristics and fluid properties of Daqing Oilfield reservoir, the viscoelasticity and oil displacement efficiency of the intramolec-ular cross-link polymer gel system were investigated after it was selected by orthogonal experiment through evaluating seepage characteristics, with core flow experiment and oil displacement experiment. It was found that intramolecular cross-link poly-mer gel system with smaller molecular aggregate, higher resistance coefficient and residual resistance coefficient can be ob-tained by regulating polymer concentration, water solution salinity and polymer/Cr3+. Once intramolecular cross-link reacted in polymer solution, on the one hand, transmission migration ability of polymer molecular clew is enhanced, and its rigidity is also improved. In this way, deformation ability of the polymer molecular clew is weakened when it flows through core pore, which can enhance the retention ability, increase the injection pressure and enlarge sweep volume effectively. On the other hand, the viscoelasticity and first normal stress difference of polymer gel system are improved, as well as the washing oil effi-ciency. The above two aspects insure jointly Cr3+ polymer gel has higher oil displacement efficiency.关键词
聚合物凝胶/正交试验/分子内交联/渗流特性/黏弹性/驱油效率Key words
polymer gel/orthogonal experiment/intramolecular cross-link/seepage characteristics/viscoelasticity/oil dis-placement efficiency分类
能源科技引用本文复制引用
卢祥国,谢坤,曹豹,陈欣..Cr3+聚合物凝胶成胶效果及其影响因素[J].中国石油大学学报（自然科学版）,2015,(3):170-176,7.基金项目
黑龙江省自然科学基金重点项目(ZD201312) （ZD201312）
东北石油大学研究生创新科研项目(YJSCX2014-017NEPU) （YJSCX2014-017NEPU）
