摘   要：以不同摩尔比的AMPS/NNDMA二元线性共聚物降失水剂和聚羧酸系分散剂（PCE）作为主要外加剂，研究了其对油井水泥浆抗滤失、流变、稠化、固结等性能的影响。试验结果表明，少量的AMPS/NNDMA共聚物就能有效控制水泥浆抗滤失性能；降失水剂使水泥浆流变性变差，但加入分散剂可大大改善体系流变性；同时两种外加剂复配有一定缓凝作用且稠化时间可调，水泥石强度也满足施工要求；随着NNDMA在降失水剂中含量的增加，水泥浆体系失水量、游离液含量减少，稠度增加，流变性和水泥石强度变差。

Abstract: Different mole ratio of AMPS/NNDMA binary linear copolymer fluid loss reducer and PCE dispersant as the main additives, the oil well cement slurry filtration resistance, rheology, thickening, the influence of consolidation are studied.The results show that the AMPS/NNDMA copolymer under little amount can effectively control the slurry filtration performance and free fluid content. Fluid loss reducer made the bad slurry rheological property, the dispersant can greatly improve the rheological property. With high temperature and high pressure thickening the consistency of cement slurry and thickening time, experiments show that additive offers certain retarding action and adjustable thickening time. By cement compressive strength test, the results show that under the reasonable dosage, cement strength also satisfies the requirement of construction. The increasing of NNDMA in the fluid loss additive reduces water loss and free fluid content, increases the consistency, and leads the poor rheology and strength of cement. In addition, the two additives have good thermal stability and heat resistance &salt resistance.