油井水泥悬浮剂的研究进展

Research Progress of Oil Well Cement Suspension

油井水泥浆沉降稳定性是水泥浆施工性能的重要指标之一。随着勘探开发逐步朝着深井、超深井方向发展,特别是近年来井深接近万米,井底的温度将达到240℃以上,对油井水泥浆的稳定性提出了的更高的要求。传统悬浮剂往往在提高悬浮稳定性的基础上,对水泥浆流变性造成不利影响,不利于复杂井况固井施工。针对油井水泥悬浮剂的国内外研究现状进行调研,系统阐述了悬浮剂主要种类及其作用机理,重点对当前悬浮剂研究的优化情况进行分析,包括无机和有机高分子材料优选复配和共聚单体优选或接枝共聚等技术,为今后油井水泥悬浮剂研发提供借鉴。

The settlement stability of cementing slurry is one of the important indicators of cement slurry construction performance.With the more complex well conditions such as deep wells and ultra-deep wells,especially in recent years,the well depth is extended to 10000 meters,therefor the temperature of the bottom of the well will reach more than 240℃.Consequently,it poses a challenge to the stability of cementing slurry.Previously the suspending agents can improve the suspension stability,but reduce the rheological property of cementing slurry,which is detrimental to well cementing under complex well conditions.By summarizing the research status of oil well cement suspension,the main types and mechanisms of suspending agents were systematically discussed.Additionally,the optimization of current suspension agents was analyzed,including the optimal compounding of inorganic and organic polymer materials,the optimization of comonomers,as well as the graft copolymerization,which would provide reference for research of oil well cement suspension.