钻井液用非离子型微乳液WR-Ⅰ的研制及其封堵和润滑作用

发布时间：2018-03-29 20:41

本文选题：复合表面活性剂　切入点：非离子型微乳液　出处：《油气地质与采收率》2017年03期

【摘要】：作为油田处理剂,微乳液主要应用于三次采油,在钻井液中的应用未见报道。水平井和定向井钻进过程中经常遇到井壁失稳和摩阻过大的问题,常用的钻井液处理剂功能单一,难以同时兼顾封堵和润滑功能。针对上述问题,以Span-80和Tween-80复合表面活性剂为基础,以正丁醇为助表面活性剂,研制了非离子型微乳液WR-Ⅰ,考察其对钻井液性能的影响,并重点研究其封堵和润滑作用。实验结果表明,非离子型微乳液WR-Ⅰ的粒度中值为75nm,界面张力低至0.005mN/m,对钻井液的流变性影响小,有降滤失作用;通过快速吸附及封堵作用,该微乳液封堵率高达95%,对泥页岩井壁稳定具有突出作用;该微乳液具有优异的润滑作用,其极压润滑系数为0.051,滤饼粘附系数为0.138,可大幅度降低钻具与井壁、钻具与钻屑间的摩阻。
[Abstract]:As the oil treatment agent, micro emulsion is mainly used in the extraction of three times, in the drilling fluid has not been reported. The application of horizontal wells and directional drilling are often encountered in the process of borehole instability and friction is too large, commonly used drilling fluid additive single function, difficult to balance sealing and lubrication function to solve the above problems. In Span-80, and the Tween-80 composite surfactant based, with n-butanol as cosurfactant, developed Nonionic Microemulsion WR- 1, to investigate its effects on the properties of drilling fluids, and focus on the sealing and lubrication. The experimental results show that the median particle size of Nonionic Microemulsion of WR- for 75Nm, the interfacial tension decreased to 0.005mN/m, the rheological properties of drilling fluid, a fluid loss effect; through rapid adsorption and plugging effect, the micro emulsion plugging rate as high as 95%, has a prominent effect on the shale stability of the microemulsion; The lubricant has excellent lubrication effect. Its extreme pressure lubrication coefficient is 0.051, and the cake adhesion coefficient is 0.138. It can greatly reduce the friction between drilling tools and shaft lining, drilling tools and drilling cuttings.

【作者单位】：中国石化胜利石油工程有限公司钻井工艺研究院;
【基金】：国家科技重大专项“低渗油气藏钻井液完井液及储层保护技术”(2016ZX05021-004)和“致密油气开发环境保护技术集成及关键装备”(2016ZX05040-005) 中国石化重点课题“低活度水基钻井液体系研究”(JP15015)
【分类号】：TE254.4

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