当前,保护油层使之不受污染的问题越来越受到重视。使用不适当的修井液,是引起油层污染、油井生产量下降的愿因之一。我们参考国外经验,研制成功用HEC(羟乙基纤维素)配制的无固相修井液。这种修井液在辽河油田14井次的试油、修井、防砂、注蒸汽热采,酸化等作业中使用,效果 At present, the issue of protecting oil reservoirs from being polluted is getting more and more attention. Using improper workover fluids is one of the reasons why oil layer contamination and well production decline. We refer to foreign experience, the successful development of HEC (hydroxyethyl cellulose) formulated solid-state workover fluid. This workover fluid in Liaohe Oilfield 14 wells test oil, workover, sand control, steam injection heat recovery, acidification and other operations use, the effect