钻井液与完井液2017，Vol.34Issue(6)：52-55,61,5.DOI:10.3969/j.issn.1001-5620.2017.06.010
井壁强化与堵漏双作用可钻水泥实验研究
Experimental Study on Drillable Set Cement Capable of Strengthening Borehole Wall and Controlling Lost Circulation
摘要
Abstract
Conventional compound lost circulation materials (LCMs) have no cementation among their particles.When these LCMs are put into the hole to stop mud losses,they are quite easy to be eroded away by the flow of drilling fluid.Cement slurry is another LCM frequently used to deal with severe mud losses,with a shortage of being easy to make new "hole" in a hole that uses cement slurry to stop mud losses.A Laboratory study has been conducted on ddllable cement LCM.In this study,ultra-fine calcium carbonate was added into sulphoaluminate cement,a new gel material with adjustable drillability.It was found that when the concentration of ultrafine calcium carbonate in the cement slurry was not greater than 7％,the strength of the cement slurry was increasing with increase in the concentration of ultra-fine calcium carbonate.When the concentration of calcium carbonate was greater than 7％,the strength of the cement slurry was decreasing with increase in the concentration of ultra-fine calcium carbonate,i.e.,the drillability of the cement was getting better.A sulphoaluminate cement treated with 0.4％ water reducer,0.3％ viscosifier and 0.6％ retarder had thickening time of 155 min,satisfying the needs of safe operation.A new lost circulation material was thus formulated by adding 1 2％ scaly mica,1％fiber and 1.5％ limestone powders.This lost circulation material can be used to plug slots of 3 mm and 5 mm width,respectively.This drillable cement has provided a technical support for borehole wall strengthening and lost circulation control in drilling operations.关键词
可钻水泥/硫铝酸盐水泥/超细碳酸钙粉体/井壁强化/堵漏Key words
Drillability cement/Sulphoaluminate cement/Ultra-fine calcium carbonate powder/Borehole wall strengthening/Lost circulation control分类
能源科技引用本文复制引用
王在明,吴艳,朱宽亮,李云峰,李路宽..井壁强化与堵漏双作用可钻水泥实验研究[J].钻井液与完井液,2017,34(6):52-55,61,5.基金项目
国家科技重大专项“渤海湾盆地黄骅坳陷滩海开发技术示范工程”(2011ZX05050). （2011ZX05050）
