摘要
吸水树脂类储层堵漏液在油田堵漏作业中,以其优异的性能发挥着越来越重要的作用。针对常用破胶剂对吸水树脂储层堵漏液破胶效果不佳的问题,通过以合成出的过碳酸钠为主剂,辅配一定比例的稳定促进剂,得到了一种破胶解堵性能优异的氧化破胶剂(取代号为PLOK)。与其他常用的6种破胶剂的对比评价结果表明,PLOK和过硫酸铵破胶剂的效果最好,而且破胶液均透明澄清,几乎为水状自由流动,无凝胶颗粒状残留物,但PLOK的破胶率高达90.91%,而过硫酸铵的破胶率为85.45%;当PLOK加量超过2%时破胶率趋于恒定。储层保护评价实验表明,PLOK对高、低渗透率岩心的破胶效果不一,但破胶解堵后吸水树脂储层堵漏液的油相渗透率恢复值均在85%以上。
The water-absorbing resin reservoir plugging fluids has been playing an important role in oilfield reservoir plugging operations,however,common gel breaker cannot break gel completely.A kind of gel breaker PLOK is synthetized,compared with six common gel breakers,PLOK and ammonium persulfate are the best gel breakers,and there is no particle residue.The breaking rate of PLOK is 90.91% with content of 2%,higher than ammonium persulfate of 84.45%,which the reservoir protection evaluation experiments show that gel breaking effect of PLOK varies in high and low permeability core and that oil permeability recovery of water-absorbing resin reservoir plugging fluids is more than 85%.
出处
《钻井液与完井液》
CAS
北大核心
2013年第4期43-45,94,共3页
Drilling Fluid & Completion Fluid
基金
中国海洋石油总公司项目级项目"渤海油田井漏对策和配套工艺研究"
关键词
氧化破胶剂
合成
防止地层损害
吸水树脂储层堵漏液
临时性封堵
Gel breaker
Synthesis
Formation damage prevetion
Water-absorbing resin reservoir plugging fluid
Temporary plugging
