改性大豆卵磷脂在水基钻井液中的润滑性能

王兰; 吴琦; 蒋官澄

doi:10.3969/j.issn.1001-5620.2019.01.002

改性大豆卵磷脂在水基钻井液中的润滑性能

doi: 10.3969/j.issn.1001-5620.2019.01.002

王兰^1,2,
吴琦²,
蒋官澄³

1. 油气田应用化学四川省重点实验室, 四川广汉 618300;
2. 川庆钻探工程有限公司钻采工程技术研究院, 四川广汉 618300;
3. 中国石油大学(北京), 北京 102249

详细信息

作者简介:
王兰,高级工程师,硕士,2007年毕业于西南石油大学应用化学专业,现在川庆钻探工程公司钻采工程技术研究院从事钻井液技术研究工作。电话(0838)5151118;E-mail:lanzi_2012@126.com

中图分类号: TE254.4
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出版历程
- 收稿日期: 2018-12-05
- 刊出日期: 2019-02-28

Modified Soybean Lecithin Used as Water Base Drilling Fluid Lubricant

1. Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Guanghan, Sichuan 618300;
2. Drilling & Production Technology Research Institute of CCDC, Guanghan, Sichuan 618300;
3. China University of Petroleum, Beijing 102249

摘要

摘要: 利用乳酸和双氧水对天然大豆卵磷脂进行了羟基化改性，改性大豆卵磷脂环保无毒，EC₅₀大于30 000 mg/L，同时改性后大豆卵磷脂在清水、淡水基浆及水基钻井液体系中润滑性能良好。在清水中，加入改性大豆卵磷脂的极压膜强度是国产对比润滑剂PF-Lube和CX-300H的2倍以上，在30 min四球摩擦实验中，0.5%改性大豆卵磷脂摩擦系数在0.1以下，优于国外DFL润滑剂。在4%淡水基浆中，120℃老化前后，加入1%改性大豆卵磷脂淡水基浆EP极压润滑系数降低率达90%，润滑性能优于对比的DFL和PF-Lube润滑剂。在密度为2.0 g/cm³的水基环保钻井液体系中，加入1%改性大豆乱磷脂的体系120℃老化后黏度更低，高温高压滤失量降低50%左右，滤饼黏附系数和极压润滑系数均降低60%以上。最后，利用扫描电镜对极压划痕进行了分析，并利用XPS元素分析揭示了改性大豆卵磷脂润滑机理。整体而言，改性大豆卵磷脂环保无毒，并具有良好的极压润滑性能，在大位移水平井水基钻井液中具有一定应用前景。
- 水基钻井液 /
- 润滑剂 /
- 大豆卵磷脂 /
- 划痕分析
Abstract: Using lactic acid and hydrogen peroxide, the natural soybean lecithin can be modified through hydroxylation. The modified soybean lecithin is non-toxic, with EC₅₀ greater than 30,000 mg/L. The modified soybean lecithin has good lubricity in fresh water, fresh water bentonite slurry and water base drilling fluids. Fresh water containing modified soybean lecithin has extreme pressure film whose strength is twice that of the extreme pressure film formed from PF-Lube in fresh water or CX-300H in fresh water. In 30 min four-ball friction test, the friction coefficient of a 1% modified soybean lecithin solution is less than 0.1, better as a lubricant than the DFL lubricant imported. The modified soybean lecithin was used at a concentration of 1% to treat 4% bentonite fresh water slurries before and after aging at 120 ℃,reducing the extreme pressure friction coefficient of the bentonite slurries by 90%, better than DFL and PF-Lube as extreme pressure lubricant. An environmentally friendly water base drilling fluid of 2.0 g/cm³ treated with 1% modified soybean lecithin and aged at 120 ℃ had lower viscosity,the HTHP filtration rate was reduced by about 50%, and the sticking coefficient and extreme pressure friction coefficient were all reduced by at least 60%. SEM was used to analyze the extreme pressure scratch, and XPS element analysis was conducted to reveal the lubricating mechanisms of the modified soybean lecithin. In general, the modified soybean lecithin is non-toxic and has good extreme pressure lubricity, revealing itself as a good lubricant in extended reach horizontal drilling.
- Water base drilling fluid /
- Lubricant /
- Soybean lecithin /
- Scratch analysis

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参考文献(11)

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