Abstract: Cementing in deep wells and ultra deep wells, especially in gas wells is extremely difficult, and it may be a world question there. Northeast Sichuan is one of the most complicated areas in China's onshore oil and gas fields in terms of development. It is characterized by deep wells, high temperature, high pressure and rich H2S gas. There are different formation pressure systems in the same open well section. Lost circulations and kicks often happen there. Drilling and cementing get more difficult. Through scientific research, technicians of cementing engineering have optimized cementing technologies and developed special slurry systems. The complicated cementing problem in the area has been solved successfully, so the cementing quality is guaranteed.

Key words: gas province in northeast Sichuan, deep well, gas well, cementing, slurry technology

摘要： 深井、超深井固井,尤其是气井,难度非常大,有的问题可以说是世界级的难题。川东北是我国陆上油气田开发最复杂的地区之一,不仅井深,而且井下高温、高压、高含硫化氢气体,在同一裸眼井段往往有不同的压力系统,井漏、井涌现象严重,钻井难度大,固井难度更大。中原油田固井工程技术人员通过科技攻关,优选了固井工艺技术,开发了特种水泥浆体系,成功地解决了这一复杂地区的固井技术难题,使固井质量得到了保证。

关键词: 川东北气区, 深井, 气井, 固井, 水泥浆体系