高温高性能低密度水泥浆的室内研究  

Laboratory Study of High-temperature Resistance and High-performance Low-density Cement Slurry

作　　者：曾建国[1] 孙富全[1] 高永会[1] 侯薇[1] 李鹏晓[1] 

机构地区：[1]天津中油渤星工程科技有限公司

出　　处：《钻井液与完井液》2011年第3期47-49,94-95,共3页Drilling Fluid & Completion Fluid

摘　　要：针对高温、低压易漏以及封固段长等固井难点,开展了密度为1.2 g/cm3长封固段高温水泥浆的研究。选择耐高压合成钠硼珠为减轻剂,基于紧密堆积理论设计高温低密度高性能水泥浆,开发出了配套的缓凝剂BCR-300S和降失水剂BCF-230L,并研究了耐高温低密度水泥浆的高温稳定性、流变性、水泥石在高温下的强度稳定性以及顶部强度发展情况。研究结果表明,含有钠硼珠的低密度水泥浆密度在高压下变化较小,高温下浆体稳定(≤0.05 g/cm3);水泥浆在180℃下稠化时间和失水性能可调;水泥石在230℃下养护24 h强度达18 MPa,强度7 d不衰退,并且水泥浆顶部强度发展较快。In this paper,aiming at the difficulties of high temperature,low formation pressure and long cement section in cementing job,a cement slurry system with the density of 1.2 g/cm3 is developed based on close packing theory,which is composed of sodium boron pearls as light weight additive,BCR-300S as the retardant and BCF-230L as the filtration reducer.The experimental results show that the density of this system changes little(≤0.05 g/cm3),the performances of thickening time and filtration rate can be controlled at 180℃,the strength of cement stone reaches 18 MPa after curing 24 hours and the strength can be kept for at least 7 days.

关 键 词：固井 高温水泥浆 低密度水泥浆 紧密堆积 

分 类 号：TE256.6[石油与天然气工程—油气井工程]