高温盐水水泥浆体系的室内研究

Laboratory study of high-temperature saltwater cement slurry

罗刚 舒福昌 向兴金

Luo Gang Shu Fuchang Xiang Xingjin

长江大学化学与环境工程学院, 湖北荆州 434023; 长江大学石油工程学院, 湖北荆州 434023; 荆州汉科新技术研究所, 湖北荆州 434000

College of Chemical and Environmental Engineering, Yangtze University, Jingzhou 434023; College of Petroleum Engineering, Yangtze University, Jingzhou 434023; Jingzhou HANC New-Tech Research Institute, Jingzhou 434000

在盐膏层固井作业时, 常规的淡水水泥浆不能满足固井作业的要求。在评价了不同缓凝剂和不同降失水剂对盐水水泥浆性能影响的基础上, 优选出了以缓凝剂CHY-5和降失水剂CFL-2为主剂的含盐量为18%(BWOW)盐水水泥浆体系, 并分析了和CFL-2的作用机理。室内研究表明:缓凝剂CHY-5对温度不敏感, 能有效的防止井底温度波动对固井工作的影响;降失水剂CFL-2能有效控制体系的滤失量;优选的盐水水泥浆的稠化时间可调, 过渡时间短, 呈近直角稠化;能满足深部地层(约4 000 m)、井温约140℃的地层固井作业的要求。

In the process of salt stratum cementing operation, routine potable water cement slurry can't meet the need of cementing operation of salt strata.Laboratory studies were done on the influence of different retarders and filtrate reducers on the performance of saltwater cement slurry in which NaCl contents is 18%(BWOW),and the saltwater cement slurry was formulated using retarder CHY-5 and filtrate reducer CFL-2 as the main additives.It was found that the influence of hole temperature fluctuation on cementing can be ignored because CHY-5 was insensitive to temperature changes and CFL-2 can effectively control filtration.This cement slurry had a controllable thickening time and short transition time which meant that the slurry can become thick promptly.This cement slurry can be used in deep well (about 4 000 m) cementing at a temperature of about 140℃.

https://doi.org/10.3969/j.issn.1008-2336.2009.02.020