本文根据四川地层特点，针对聚合物钻井液在高温高压井段及盐类污染下，滤失量大，滤饼质量差等问题，研究了抗温抗盐性聚合物滤失剂ＣＰＦ。室内研究表明：ＣＰＦ在１８０℃的淡水钻井液中，或在１５０℃的含盐钻井液中（ＮａＣｌ３×１０５ｍｇ／Ｌ，Ｃａ２＋３×１０３ｍｇ／Ｌ），均能有效的降低滤失量，且热稳定性好。在四川、吐哈等油气田应用，取得了良好的效果。 In this paper, according to the characteristics of Sichuan strata, aiming at the problems of polymer drilling fluid in high temperature and high pressure well section and salt pollution, the filter loss and filter cake quality are poor. Laboratory studies have shown that CPF can effectively reduce the fluid loss in freshwater drilling fluid at 180 ℃ or saline drilling fluid at 150 ℃ (NaCl3 × 105mg / L, Ca2 + 3 × 103mg / L) Good sex. In Sichuan, Turpan and other oil and gas fields, and achieved good results.