钻井液用微乳液润滑剂NE的研究与应用

董兵强; 邱正松; 邓智; 张华莲; 康远波

doi:10.3969/j.issn.1001-5620.2018.03.009

钻井液用微乳液润滑剂NE的研究与应用

doi: 10.3969/j.issn.1001-5620.2018.03.009

董兵强^1,2,3,
邱正松³,
邓智^1,2,
张华莲^1,2,
康远波^1,2

1. 页岩气勘探开发国家地方联合工程研究中心·重庆地质矿产研究院, 重庆 400042;
2. 国土资源部页岩气资源勘查重点实验室·重庆地质矿产研究院, 重庆 400042;
3. 中国石油大学(华东), 山东青岛 266580

基金项目:

国家自然科学基金“高温高密度高矿化度钻井液流变性的调控机理及新方法”（U1562101）；重庆市“科技创新领军人才支持计划”（CSTCCXLJRC201712）；重庆市科研院所绩效激励引导专项“页岩气储层纳米乳液防水锁剂研究”（cstc2017jxjl90001）。

详细信息

作者简介:
董兵强,工程师,硕士,1990年生,毕业于中国石油大学(华东)石油与天然气工程,现在从事钻井液技术研究工作。电话15689131689;E-mail:dbqs123@163.com/qiuzs63@sina.com。

中图分类号: TE254.4
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出版历程
- 收稿日期: 2018-01-09
- 刊出日期: 2018-05-30

Study and Application of a Drilling Fluid Microemulsion Lubricant NE

1. National and Local Joint Engineering Research Center of Shale Gas Exploration and Development, Chongqing Geology and Mineral Research Institute, Chongqing 400042;
2. Key Laboratory of Shale Gas Exploration, Ministry of Land and Resources, Chongqing 400042;
3. China University of Petroleum, Qingdao, Shandong 266580

摘要

摘要: 当前钻井液用液体润滑剂存在抗温性能差、制备工艺复杂、起泡率及荧光级别高等难题，制约了水平井钻井井眼的有效延伸，降低了钻井效率。结合胶体与界面化学基础理论，以液态石蜡、Span80及Tween80等为原料，研发出一种微乳液润滑剂NE，并通过室内实验评价了其性能，分析了其主要润滑机理。研究结果表明，NE稀释后形成的纳米液滴呈正电性，平均粒径在187～258 nm之间；加入2.0% NE后膨润土浆的润滑系数降低率为83.8%，泥饼黏附系数降低率为74.2%；NE可抗160℃高温，耐温性良好，荧光级别为2级，起泡率低，与钻井液配伍性良好；基于吸附作用与纳米效应，NE可良好地吸附在矿物与金属钻具表面，大幅提高润滑效率。现场应用结果表明，NE可大幅降低钻柱扭矩与摩阻，减少卡钻事故发生频率，满足水平井段钻井液润滑性的技术要求。
- 钻井液 /
- 润滑剂 /
- 微乳液 /
- 纳米
Abstract: Deficiencies have been found of the drilling fluid lubricants used presently, such as poor high temperature stability, complex preparation process, severe foaming and high level of fluorescence etc. These deficiencies have hindered drilling horizontal wells with longer horizontal displacement, and decreased drilling efficiency. A new micro emulsion lubricant, NE, has been developed with liquid paraffin, Span80 and Tween80 etc. based on the basic principle of colloid and interface chemistry. Laboratory study on the performance of NE showed that the nanophase liquid drops formed by the dispersed NE are positively charged, and the average diameter of the drops is between 187 nm and 258 nm. A bentonite slurry treated with 2.0% NE has its coefficient of friction reduced by 83.8%, and sticking coefficient of mud cake reduced by 74.2%. NE has good high temperature stability; it performs effectively at 160℃. NE has fluorescence level of 2 and is resistant to foaming. NE is compatible very well with drilling fluids. NE can firmly adsorb on the surfaces of minerals and metallic drilling tools through nano effect, thereby greatly enhance the lubricating efficiency of the drilling fluid. Field application has demonstrated that NE greatly reduced torque and friction of drilling tools and minimized the occurrence of pipe sticking, satisfying the lubricity requirement imposed on drilling fluid in horizontal drilling.
- Drilling fluid /
- Lubricant /
- Micro emulsion /
- Nanometer

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参考文献(23)

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