钻井液用极压润滑剂PF-EXLUBE的开发及应用

Development and Application of Extreme-pressure Lubricant (PF-EXLUBE) for Drilling Fluid

薛森 狄明利 夏小春 曾祥聪 汪国辉

XUE Sen DI Mingli XIA Xiaochun ZENG Xiangcong WANG Guohui

中海油田服务股份有限公司油田化学事业部深圳作业公司，广东深圳　518000 中海油田服务股份有限公司油田化学研究院，河北燕郊　065201

Shenzhen Operating Company, Oilfield Chemicals Division , China Oilfield Services Limited, CNOOC, Shenzhen Guangdong 518000, China Institute of Oilfield Chemicals, China Oilfield Services Limited, CNOOC, Yanjiao Hebei 065201, China

针对海上钻进大位移井、水平井旋转扭矩高，影响作业安全和作业时效问题，以海水聚合物钻井液作为依托，对一系列润滑剂的常规润滑性能和抗极压润滑性能进行评价筛选，开发了一种极压润滑剂PF-EXLUBE。采用极压润滑仪和润滑评价模拟装置（LEM）对其分别使用在氯化钾-聚合物钻井液、饱和氯化钠钻井液和甲酸钾钻井液中的润滑性能进行评价测试，实验结果表明，当PF-EXLUBE加量为1%时，常温条件下摩擦系数降低了33%～95%；高温高压（150 ℃、100 psi）条件下摩擦系数降低了60%～80%。PF-EXLUBE首先在南海东部某水平井中应用，应用结果表明，在钻井液中加入2% PF-EXLUBE，钻进扭矩降低了15%～20%，且效果维持时间长，体现出良好的降扭矩效果。

To solve the problem of the high drag and torque in drilling extended reach wells and horizontal wells, to ensure operation safety and improve operation efficiency, based on sea-water polymer drilling fluid, an extreme-pressure lubricant using in drilling fluid, PF-EXLUBE was developed through screening and evaluating experiments of the properties of conventional lubricating and extreme-pressure of a series of lubraicants. The extreme pressure lubricator and the lubrication evaluation simulation device (LEM) were used to evaluate the lubricating properties of potassium chloride-polymer, saturated sodium chloride drilling-in fluid and potassium formate drilling-in fluid respectively.The experimental results show that when the amount of PF-EXLUBE is 1%, the friction coefficient is reduced by 33% ～95% under normal temperature conditions; the friction coefficient is reduced by 60% ～80% under high temperature and high pressure (150 ℃, 100 psi) conditions. PF-EXLUBE has been first applied in a well of the eastern South China Sea. The application results show that adding 2% PF-EXLUBE to the drilling fluid the torque of drilling could reduce by 15% ～20%, and the effect lasts for a long time. It shows good torque reduction effect.

https://doi.org/10.3969/j.issn.1008-2336.2022.02.103