摘要
针对油藏非均质性特点,进行了铬冻胶调驱实验研究。研究表明:随着聚合物浓度和交联剂用量的增加,调驱体系成胶时间减小,体系的成胶强度和稳定性增加;随着促凝剂质量分数增加,调驱体系成胶时间和成胶强度增加,稳定性随交联剂和促凝剂质量分数的增加先增加后减小。对优选出的最佳成胶体系配方性能评价表明:体系的成胶时间和成胶强度随着矿化度的增加均先减小后增加;随着p H值的增加,体系的成胶时间增长,成胶强度先增加后下降。该体系的耐冲刷性好,最终采收率在水驱基础上提高21.26%,在非均质地层中具有良好的调驱效果。
In view of oil reservoir heterogeneity,the study of chromium gel flooding system was carried out.The results indicated with the increase of polymer concentration and the number of crosslinking agents,the gelling time decreased.With the increase of polymer concentration and crosslinking concentration,the gelling time and gelling strength rose.The gelling stability went up with the increase of polymer concentration,while increased first then declined later with the increase of the crosslinking agents and coagulants concentration.Performance evaluation results of the preferred gelling system indicated the gelling time and the gelling strength increased first then declined later as the mineralization degree increased.With the increase of p H,gelling time grew,and gel strength increased first then dropped later.The system was resistant to scour,the ultimate recovery improved 21.26% on the basis water flooding,and reflected good flooding effects in heterogeneity stratum.
出处
《石油地质与工程》
CAS
2017年第6期112-115,共4页
Petroleum Geology and Engineering
关键词
铬冻胶
体系优选
性能评价
采收率
chromium gel
system optimization
performance evaluation
recovery
