摘要
在大位移井钻井过程中,水基钻井液的润滑效果是制约开发效率的一个难题,其性能优劣对钻具与井壁间的扭矩、摩阻及井壁稳定性和井眼清洁有着重要影响。通过对高分子脂肪酸改性制备了一种高效润滑剂NC-1,该润滑剂具有润滑性优良、抗温性好、抗摩阻系数高等特点。进一步结合抑制剂、降滤失剂、封堵防塌剂构建了一套抗高温低摩阻水基钻井液体系:2%膨润土浆+0.3%烧碱+0.2%NaCO3+0.4%PLUS+0.3%XC+3%SMP-2+3%SPNH+5%KCl+10%NaCl+2%NC-1+3%聚胺+3%防塌剂+重晶石(以上配方均为质量分数)。该水基钻井液润滑系数低至0.07,黏滞系数低至0.09,抗磨能力达到10块砝码,滚动回收率和体积防膨率均达到95%以上,高温高压线性防膨率达80%以上,其润滑降摩阻和抑制黏土水化膨胀能力显著,且能抗160℃高温,流变性较好,高温高压滤失量低于10mL。
In the drilling process of extended reach well drillings,the lubrication effect of water-based drilling fluid is a difficult problem that restricts its development efficiency.It has an important influence on the frictionand torque between the drilling tool and the borehole wall.Therefore,a high-efficiency lubricant NC-1 is prepared through laboratory experiments,which has the characteristics of excellent lubricity,good temperature resistance and high anti-friction coefficient;Further combined with inhibitor,filterreducing agent and plugging agent,a set of anti-high temperature and low friction water-based drilling fluid system is developed.The water-based drilling fluid has a lubrication coefficient as low as 0.07,a viscosity coefficient is as low as 0.09,an anti-wear capacity is 10 weights.The rolling recovery rate and the volume anti-expansion rate are both above 95%,and its lubrication and friction resistance and suppression ability are significant,the drilling fluid system has good rheology and can resist 160℃.Its high temperature and high pressure filtration loss is less than 10 mL,which has the advantages of high temperature resistance,low friction,strong inhibition and low fluid loss.
作者
管申
侯珊珊
王佳
赵春艳
Guan Shen;Hou Shanshan;Wang Jia;Zhao Chunyan(Zhanjiang Branch of CNOOC China Limited , Zhanjiang 524057, Guangdong;Jingzhou Jiahua Technology Co. Ltd., Jingzhou 434000, Hubei)
出处
《长江大学学报（自然科学版）》
CAS
2019年第8期49-52,I0004,共5页
Journal of Yangtze University(Natural Science Edition)
关键词
大位移井
润滑
抗高温
摩阻
水基钻井液
extended reach well
lubrication
high temperature resistance
friction resistance
water-based drilling fluid
作者简介
管申(1984-),男,高级工程师,现主要从事海上钻完井技术方面的研究和管理工作,guanshen@cnooc.com.cn.
