Cementing of adjustment wells in Jilin Oilfield is verydifficult, failures occur frequently. The causes of poorcementing include complicated geological condition,low well temperature, channeling of oil, gas and wa-ter. A early strength agent, DWA-Ⅱ, for fluid losscontrol in low temperature is developed. It has the ad-vantages of improving the flow ability of cement slur-ry, reduce water loss, enhance the early strength ofcement, etc. Its application in field is very successful,and the cementing quality is remarkably improved.%吉林油田1000 m以下的调整井地层稳定性差、井温低、油层渗透率低，在开发过程中的大量注水使地下流体分布难掌握，油、气、水窜问题难以控制，甚至造成固井失政。研制了水泥低温降失水早强剂DWA-Ⅱ。该剂能改善大连A级水泥浆的流动性、降低水泥浆失水量、提高水泥石的早期强度、实现水泥浆稠化曲线呈"直角"。经4 3口井现场应用表明，DWAⅡ能使水泥浆具有流动性好、低失水、早强、"直角"稠化等特性，使水泥浆和地层及套管间的界面胶结良好，实现有效封窜，明显地提高了固井质量。
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