适用于页岩气水平井的低摩阻硅酸钾钻井液体系  

Low Friction Potassium Silicate Drilling Fluid System For Shale Gas Horizontal Wells

作　　者：雷正勇 许明标[1,2] 由福昌 郭远曜 周文 LEI Zhengyong;XU Mingbiao;YOU Fuchang;GUO Yuanyao;ZHOU Wen(School of petroleum engineering,Yangtze University,Wuhan,Hubei 430100;Hubei Collaborative Innovation Center for unconventional oil and gas,Wuhan,Hubei 430100;Jingzhou Jiahua Technology Co.,Ltd.,Jingzhou,Hubei 434000)

机构地区：[1]长江大学石油工程学院,武汉430100 [2]非常规油气湖北省协同创新中心,武汉430100 [3]荆州嘉华科技有限公司,湖北荆州434000

出　　处：《钻井液与完井液》2021年第1期62-67,共6页Drilling Fluid & Completion Fluid

基　　金：国家科技重大专项课题“大型油气田及煤层气开发及勘探评价”(2016ZX05060033-004)。

摘　　要：当前环保形势日趋严峻,亟待广大钻井液从业者开发出一套可替代油基的水基钻井液体系,来解决页岩气水平钻进过程中存在的摩阻、井壁稳定以及井眼清洁等一系列难题。本次研究在硅酸钾钻井液强抑制、强封堵、易成膜的基础上,开发引入了一种具备协同封堵能力的强效水基润滑剂,并通过系列筛选和评价实验,构建了一套低摩阻硅酸钾钻井液体系。其润滑系数在0.08左右,抗磨砝码质量达到10 kg,具备媲美油基钻井液的润滑和抗磨性能;同时具有较低滤失量(FLHTHP小于6 mL);此外该体系还有较强的抑制和抗污染能力,流变易于控制,完全能满足页岩油气藏的开发需要。At present,with the increasingly severe environmental protection pressure,it is more and more urgent for drilling fluid practitioners to develop a set of water-based drilling fluid system that can replace oil-based to solve a series of problems such as friction,wellbore stability and borehole cleaning in the process of shale gas horizontal drilling.In this study,a potent water-based lubricant with synergistic plugging ability was developed and introduced on the basis of potassium silicate drilling fluid’s features such strong inhibition,strong plugging and easy film-forming.Finally,the low friction potassium silicate drilling fluid was constructed through a series of screening and evaluation experiments.Its lubrication coefficient is about 0.08,and the weight of anti-wear weight reaches 10 kg,which is comparable to oil-based lubrication and anti-wear performance;at the same time,it has a low filtration rate(FL_(HTHP)<6 mL);in addition,the system has strong inhibition and anti pollution ability,and its rheology is easy to control,which can fully meet the development needs of shale oil and gas reservoirs.

关 键 词：页岩气 水平井 强效水基润滑剂 硅酸钾 

分 类 号：TE254.3[石油与天然气工程—油气井工程]