摘要
为解决固井隔离液湿混中存在的工序多、费时费力、应用范围有限等问题,开展了边混边注型隔离液的研制工作。首先,通过水泥泵车混配隔离液的地面试验测得流变参数,再与室内利用瓦林搅拌器以不同方式混配隔离液的流变参数进行分析对比,并依此确立了与固井水泥车较为近似的仿真混拌模式。其次,利用仿真混拌模式进行了隔离液体系外加剂、外掺料的筛选与优选,从而研制出了一种可以适应边混边注模式的固井隔离液,并进行了相关的性能评价试验。试验结果表明:该隔离液具有优异的配浆性能和悬浮稳定性能,有效解决了浆体的流变性与稳定性之间的矛盾;采用重晶石作为加重材料,密度在1.35～1.50kg/L之间可调;与钻井液相容性良好,抗温达到170℃。
In order to solve the problems in wet mixing cementing spacer operation, including time consuming, and limitation to certain situation the injecting while mixing （IWM） spacer was developed. Firstly, measuring spacer rheology by surface mixing tests with cementing truck, and comparing rheology tested in different mixing means using a Waring agitator, based on which an emulation mixing pattern like cementing truck is established. Secondly, using the emulation mixing equipment, optimizations of cement additives were conducted and a proper IWM spacer was developed and tested. Experiments indicate that the spacer can be suspended with other materials stably so that the conflicts between rheology and stability are resolved. The density of this spacer ranges from 1.35 to 1.50 g/L, and can be used in 170℃ downhole condition.
出处
《石油钻探技术》
CAS
北大核心
2009年第4期57-60,共4页
Petroleum Drilling Techniques
关键词
固井
隔离液
边混边注
稳定性
流变性
well cementing
spacer
injection while mixing
stability
rheology
