适用于大位移井新型水基钻井液室内研究  

Laboratory Study on New Water Base Drilling Fluid for Extended Reach Wells

作　　者：陈斌 周姗姗 赵远远 覃建宇 饶志华 狄明利 左坤 CHEN Bin;ZHOU Shanshan;ZHAO Yuanyuan;QIN Jianyu;RAO Zhihua;DI Mingli;ZUO Kun(Shenzhen Branch of CNOOC(China)Co.,Ltd.,Shenzhen,Guangdong 518067;Jingzhou Jiahua Technology Co.,Ltd.,Jingzhou,Hubei 434000;Shenzhen Operation Company of Oilfield Chemical Division of COSL,Shenzhen,Guangdong 518067)

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东深圳518067 [2]荆州嘉华科技有限公司,湖北荆州434000 [3]中海油服油田化学事业部深圳作业公司,广东深圳518067

出　　处：《钻井液与完井液》2021年第1期42-46,共5页Drilling Fluid & Completion Fluid

摘　　要：为了满足大位移井对水基钻井液的需要,针对水基钻井液润滑性、摩阻扭矩以及当量循环密度控制等问题,通过在水基钻井液中引入一种多功能基液MBF,得到一种新型水基钻井液,其可有效改善水基钻井液的润滑性能,使其接近油基钻井液。结果表明,在水基钻井液中,MBF含量为30%时,其润滑系数为0.064,优于常规氯化钾聚合物钻井液的0.123,接近油基钻井液的0.056;同时该新型水基钻井液可有效抑制黏土水化造浆,且具有更好的降滤失性能,高温高压滤失量低,接近于油基钻井液。构建的新型水基钻井液能够满足大位移井钻探的需要。A new water base drilling fluid was formulated to satisfy the needs of extended well drilling.Optimization was done to the lubricity,friction,torque and the control of the equivalent density of the drilling fluid.By adding a multi-function base fluid MBF into the drilling fluid,the lubricity of the drilling fluid can be improved to a level that is equivalent to oil base drilling fluids.Comparison of the new water base drilling fluid with conventional water base drilling fluids and oil base drilling fluids showed that the friction coefficient of the new drilling fluid treated with 30%MBF was 0.064,lower than the friction coefficient of conventional KCl polymer drilling fluid,which was 0.123,and close to the friction coefficient of an oil base drilling fluid,which was 0.056.This new drilling fluid is able to effectively inhibit the yield of clays,and has better filtration control capacity;its low HTHP filtration rate is close to that of oil base drilling fluids.The new water base drilling fluid formulated can be used to replace oil base drilling fluids in drilling extended wells.

关 键 词：大位移井 水基钻井液 多功能基液 抑制性 润滑性 

分 类 号：TE254[石油与天然气工程—油气井工程]