塔中油田KCl/聚合物“轻泥浆”的研究与应用  

Study and Application of KCl-polymer"Light Mud"

作　　者：刘俊峰[1] 陈林[2] 王书琪[3] 杜小勇[1] 徐广革 黎泽寒[1] 

机构地区：[1]塔里木油田塔中勘探开发项目经理部 [2]塔里木油田公司油气工程院 [3]塔里木油田勘探开发部

出　　处：《钻井液与完井液》2010年第6期4-7,共4页Drilling Fluid & Completion Fluid

摘　　要："轻泥浆"的低密度、低固相含量和良好的剪切稀释性对于提高钻速有直接作用,不仅对提高钻速有很好的效应,而且可为现有各项优快钻井技术提供一个优化集成的平台,以使它们能更好地发挥作用。利用三轴应力实验装置研究了地层岩石与不同钻井液作用前后的力学性质及强度变化,计算对比了岩石与不同钻井液作用前、后的地层坍塌压力,最后确定了地层坍塌压力当量钻井液密度的降低值。应用该方法,通过优选抗高温(150℃)聚合物和防塌剂,改进聚合物钻井液的封堵能力、流变性和抑制性,降低地层的坍塌压力,即降低钻井液密度,形成了KCl/聚合物"轻泥浆"体系。该技术在TZ721-5井得到了成功应用,使机械速度提高了20%以上。With low density,low viscosity,low clay and low gel strength,the so-called 'light mud' plays an important role in increasing ROP and making full use of advantages of different drilling technology.Triaxial stress test apparatus was applied to research the mechanical property and strength of formation rock that met some different drilling fluids,and get the conclusion of the decreased value of ECD caused by the caving pressure.This paper introduces the KClpolymer 'light mud',developed through optimization of high temperature and shale inhibitor,modification of shut off capability rheology inhibition and reduction of formation collapse pressures,showing good application in well TZ721-5 that increased the ROP by more than 20%.

关 键 词：地层坍塌压力 低密度钻井液 KCl/聚合物钻井液 提速 

分 类 号：TE254.3[石油与天然气工程—油气井工程]