钻井液环保润滑剂SMLUB-E的研制及应用

Development and Application of an Environmental-FriendlyDrilling Fluid Lubricant SMLUB-E

钱晓琳 宣扬 林永学 杨小华

QIAN Xiaolin XUAN Yang LIN Yongxue YANG Xiaohua

中国石化石油工程技术研究院，北京 100101

Sinopec Research Institute of Petroleum Engineering, Beijing, 100101, China

针对现有钻井液润滑剂耐温与环保性能难以兼顾的不足，以天然脂肪酸、有机多元醇等为原料，合成了钻井液环保润滑剂SMLUB-E。室内试验发现：膨润土浆中加入1.0% SMLUB-E时，摩阻系数可降至0.05，且形成的润滑膜强度高；聚磺钻井液中加入2.0% SMLUB-E，可使摩阻系数从0.31降至0.08，其润滑性能优于加入8.0%原油；SMLUB-E耐温160 ℃，对钻井液的流变性、滤失量无不利影响，无毒，环保性能好。SMLUB-E在塔河油田TP238CH井等深井进行了现场应用，加入SMLUB-E的钻井液中表现出良好的润滑降摩性能，大幅降低了井下摩阻，避免了托压、卡钻等复杂情况发生。研究结果表明，SMLUB-E具有良好的耐温性与环保性，能有效解决深井超深井钻井井下摩阻大的技术难题。

SMLUB-E, an environmental-friendly drilling fluid lubricant, was synthesized from natural fatty acids and organic polyols because the existing drilling fluid lubricant was not sufficiently temperature-resistant, nor did it have sufficient environmental friendliness. An evaluation conducted indoors in laboratory conditions demonstrated that when 1.0% SMLUB-E was added to bentonite mud, the friction coefficient could be as low as 0.05 while maintaining a high strength of lubricating film. When 2.0% SMLUB-E was added to polysulfonate drilling fluid, the friction coeffi-cient decreased from 0.31 to 0.08 with lubricity better than that of 8.0% crude oil added. SMLUB-E has a temperature resistance of 160 ℃, which has no adverse effect on rheological property and fluid loss of drilling fluid. Further, SMLUB-E is easy to biodegrade, non-toxic and environmental-friendly. Field Applications of SMLUB-E has conducted on deep wells including Well TP238CH in Tahe Oilfield, the drilling fluids added SMLUB-E showed good lubrication and friction-reducing property, significantly reduced downhole friction, avoided complex situations such as WOB hang-off and sticking, etc.. The results showed that SMLUB-E has a good performance in temperature resistance and environmental friendliness, and could effectively solve the technical problem of large downhole friction in the drilling of deep & ultra-deep wells.

国家科技重大专项“耐高温高性能钻井液体系及井筒强化技术”（编号：2017ZX05005-005-002）资助

https://doi.org/10.11911/syztjs.2019113