CAJ | 학술논문

为进一步探究不同 pH 条件下 Cr3+聚合物凝胶“分子内”交联成胶机理，针对大庆喇嘛甸油田储层地质特征和流体性质，以聚合物质量浓度、矿化度调节剂浓度和聚铬比为影响因素，在通过正交试验优选出成胶效果良好的聚合物凝胶配方组成基础上，研究了 pH 对 Cr3+聚合物凝胶成胶效果影响。结果表明，酸性条件能够促进醋酸铬的电离，增大多核羟桥配离子与聚合物分子链上羧基之间发生配位反应的概率，有利于 Cr3+聚合物凝胶形成“分子内”交联结构体系；随溶剂水 pH 增加，溶液中 OH -数量增加，参与交联反应的 Cr3+数量减少，聚合物凝胶分子内”交联成胶效果变差；适当降低溶剂水 pH 可进一步改善聚合物凝胶“分子内”交联成胶效果。
위진일보탐구불동 pH 조건하 Cr3+취합물응효“분자내”교련성효궤리，침대대경나마전유전저층지질특정화류체성질，이취합물질량농도、광화도조절제농도화취락비위영향인소，재통과정교시험우선출성효효과량호적취합물응효배방조성기출상，연구료 pH 대 Cr3+취합물응효성효효과영향。결과표명，산성조건능구촉진작산락적전리，증대다핵간교배리자여취합물분자련상최기지간발생배위반응적개솔，유리우 Cr3+취합물응효형성“분자내”교련결구체계；수용제수 pH 증가，용액중 OH -수량증가，삼여교련반응적 Cr3+수량감소，취합물응효분자내”교련성효효과변차；괄당강저용제수 pH 가진일보개선취합물응효“분자내”교련성효효과。
In order to further explore intramolecular rosslinked gelation mechanism of Cr3 + polymer gel under different pH conditions,effect of pH on Cr3 + polymer gel gelation performance was researched.Polymer gelformulation composition with good gelation performance was obtained by orthogonal experiment taking polymer mass concentration,water solution salinity and"polymer/Cr3 +" as the influence factors,aimed at Daqing Lamadian oilfield geological characteristics and fluid properties. The results showed that acidic conditions could promote ionization of chromium acetate and increase the number of Cr3 + in solution,thus increase the probability of coordination reaction between carboxyl in polymer chains and polynuclear olation complex ion,which is in favor of the formation of intramolecular crosslinked Cr3 + polymer gel system.The number of OH -was increased with solvent water pH,which could result in the reduction of Cr3 + involved in crosslinking reaction and gelation performance getting worse accordingly.when the system was similar to intramolecular crosslinked Cr3 + polymer gel,gelation performance of polymer gel system can be further improved by appropriately reducing pH value of solvent water.