一种调剖剂的合成与性能评价

河南油田某区块地层温度异常、矿化度高,常规调剖剂所用的聚丙烯酰胺容易分解使得调剖效果差,调剖后的吸水剖面均质性不好。为了提高调剖效果,开展了新型调剖剂的研制。实验选用疏水缔合聚合物代替聚丙烯酰胺合成了一种调剖剂,并模拟油藏实际环境对其开展了调剖剂性能的室内实验评价。确定最佳的配方为:缔合聚合物的浓度是3 500—4 000mg/L的范围,调剖交联体系为:乌洛托品0.07%、苯酚0.07%、以及间苯二酚0.02%。最后对合成的调剖剂的稳定性进行了测定。实验发现,疏水聚合物的稳定性好,老化120 d后的黏度保留率很高,适合高温高矿化度油田调剖堵水。

Synthesis and Performance Evaluation of a Type of Gelant

There is a block strata in Henan oilfield with abnormal temperature,high salinity and the use of the polyacrylamide in conventional profile control agent break down easily making the profile control poor,and the field tests of water absorption section after homogeneous was bad.In order to improve the effect of the field tests,it carried out the new profile control agent development.The experiment synthesized a kind of profile control agent by choosing hydrophobic associating polymer instead of polyacrylamide and simulated real reservoir environment to carry out experimental evaluation of the profile control agent performance.The best formula was associating polymer concentration of 3 000—3 500 mg/L range,the profile control cross-linking system: urotropin 0.07%,0.07% phenol and resorcinol 0.02%.Finally,the stability of the synthetic profile control agent is determined and found that the stability of the polymer hydrophobic is good,the retention rate of viscosity is high after 120 days,suitable for profile control water plugging in high temperature and high salinity oilfield.