哈里伯顿页岩气固井技术及对国内的启示

Halliburton Shale Gas Well Cementing Technology and Its Enlightenment to Domestic Gas Industry

针对国内页岩气水平井固井套管安全下入难度大,高密度油基钻井液条件下提高顶替效率及改变界面润湿性困难,对水泥石力学性能要求高等问题,本文对哈里伯顿公司页岩气固井相关技术进行了深入调研及分析,重点介绍了提高顶替效率的模拟软件,保证长期密封的水泥浆体系及配套技术,低伤害和防漏失固井技术,保证套管安全下入的工具等,并对Haynesville页岩气藏应用的固井技术进行了总结,期望据此对提高国内页岩气固井质量及技术攻关起到一定的借鉴指导作用。

It is difficult for casings to run safely into a horizontal shale gas well during cementing operations, and by taking into account of difficulties in improving the displacement efficiency and changing the interface wettability under conditions where the oil-based drilling fluids are of high density, high-level requirements on mechanical properties of cement slurry, etc. According to current characteristics and difficulties of shale gas well cementing in China, so as to further improve the shale gas well cementing quality, the in-depth research and analysis of shale gas well cementing-related technologies of Hal- liburton have been conducted, focusing on the description of the simulation software that improves displacement efficiency, the cement slurry system and supporting technology that ensure a long-term sealing ability, the cementing technology charac- terized by low damage and leakage control, the tools that ensure safe casing running, etc. , and the cementing techniques ap- plied for Haynesville shale gas reservoir have been summarized. The analysis shows that shale gas well cementing technologies overseas move toward the technology with characteristics of bundle, serialization, customization, integration, and the assur- ance of wellbore sealing and long-term sealing ＆ isolation. By combining with development trends of shale gas well cementing technologies overseas and characteristics of shale gas development in China, cementing challenges we currently face have been analyzed, and problems to be solved in the next step have been presented, which, to a certain extent, serves as a reference guide for knowing the status of shale gas well cementing technologies and development trends overseas, improving the shale gas well cementing quality and tackling problems in key technologies in China..