【摘要】 随着油田深部调剖应用的不断推广,以及环保要求的提高,适用于深部调剖调驱体系的低污染有机锆交联剂逐渐受到关注。以ZrOCl₂·8H₂O、乳酸、乙二胺、硫脲为原料,制备了有机锆交联剂和HPAM-锆交联凝胶,其结构和性能经SEM和岩心驱替装置表征。并利用正交实验法优化了制备条件。结果表明:制备有机锆交联剂的最佳条件为:氧氯化锆、乳酸、乙二胺及硫脲的质量比为7. 8/1/6. 7/5,反应温度为70℃,反应时间为3 h。交联温度为60℃,HPAM浓度为2 g·L^-1、聚锆比为30/1时,聚合物凝胶成胶强度达到24968 m Pa·s,成胶时间约8 h,凝胶体系可维持90 d不破胶。在级差为3. 9的双管驱替岩心实验中,两管的岩心分流率均接近50%,剖面改善率达到66. 77%。更多还原

【Abstract】 With the continuous application of deep profile control in oilfields and the increasingly strict environmental protection,zirconium crosslinkers which are suitable for deep profile control and drive system with low pollution are gradually getting more attention. The organic zirconium crosslinker and gel were prepared using ZrOCl₂·8H₂ O,lactic acid,ethylenediamine,HPAM and thiourea as materials. The structure and performance were characterized by SEM and core displacement device. The orthogonal experiment showed that the best synthetic conditions of the organic zirconium crosslinker were as follows: the mass ratio of zirconium oxychloride,lactic acid,ethylenediamine and thiourea was7. 8/1/6. 7/5,the reaction temperature was 70 ℃,and the reaction time was 3 h. When the crosslinking temperature was 60 ℃,the concentration of partially hydrolyzed polyacrylamide（ HPAM）was 2 g·L^-1,and the ratio of polyzirconium was 30/1,the gel strength of the polymer gel reached 24968 m Pa·s,and the gelation time was about 8 h,the system could keep the gel unbroken for 90 days. In the double-tube displacement core experiment with the difference of 3. 9,the core diversion rate of both tubes were finally close to 50%,the profile improvement rate reached 66. 77%.更多还原