油井水泥缓凝剂SDH-2的性能研究及应用  

Performance research and application of oil cement retarder SDH-2.

作　　者：齐志刚[1] 徐依吉[1] 王槐平[2] 何英[1] 

机构地区：[1]中国石油大学(华东)石油工程学院 [2]中国石油大学(华东)化学化工学院

出　　处：《钻井液与完井液》2005年第5期24-27,共4页Drilling Fluid & Completion Fluid

摘　　要：为满足深井固井对水泥缓凝剂的特殊要求,研制出了一种高温耐盐缓凝剂SDH-2.该缓凝剂由碱、醛、亚磷酸制备,具有工艺简单、成本低的特点.介绍了SDH-2的制备条件,考察了反应物配比和催化剂加量对产品性能的影响,并在室内评价了SDH-2的缓凝性能、耐温抗盐性能、配伍性能以及对水泥石抗压强度的影响.结果表明:SDH-2在40～170 ℃的范围内具有优良的缓凝效果,缓凝时间可调性好,稠化曲线理想,抗盐性良好,与降失水剂、减阻剂有良好的相容性,对油井水泥选择性小,水泥石抗压强度高.SDH-2在现场应用了6口井,结果表明:该缓凝剂解决了深井固井中水泥浆稠化性能不稳定,稠化时间难以控制的问题,水泥浆具有良好的流动性能,满足不同井眼条件下固井对水泥浆流动性能的要求;同时水泥浆抗压强度发展迅速,高温条件下水泥石性能稳定,符合深井固井的要求.To meet the special requirements of cement retarder for deep cementing,a high temperature and salt tolerant cement retarder was developed.In this paper,the preparation of SDH-2 was introduced,and evaluation results of retardation,thermal stability,salt tolerance,compatibility with other additives and compressive strength of cement stone were also presented.Experimental data showed that SDH-2 exhibits good retarding ability to oil well cement slurries at 40 to 204 ℃,and the thickening time is adjustable and the thickening curve is in good shape;It works well with the presence of other salts;it is compatible with dispersants,filtrate loss controllers and the set slurry has high compressive strength.SDH-2 has been applied in 6 wells.Field using verified that it could help solve problems onsite such as unstable cement slurry properties and uncontrollable thickening time in deep wells.The slurry with SDH-2 in has good rheological property,satisfying rheological requirements of cement slurry for different down hole conditions.At the same time compressive strength develops rapidly,and the stone is stable at high temperature.

关 键 词：缓凝剂 油井水泥外加剂 油井水泥 固井 固井质量 

分 类 号：TE256.6[石油与天然气工程—油气井工程]