摘要
针对油田在低压易漏地层中使用１．４０～１．６０ｇ／ｃｍ３的低密度水泥浆固井存在水泥浆返高不够、固井质量差等问题，结合矿渣膨润土水泥浆、矿渣ＭＴＣ固井技术和多功能钻井液固井技术，利用矿渣和漂珠等材料设计了密度１．２０～１．３５ｇ／ｃｍ３的超低密度矿渣膨润土水泥浆、矿渣ＭＴＣ浆和矿渣ＵＦ浆。对３种体系水泥石抗压强度、水泥浆凝结时间、流变性和稳定性进行了试验对比，并对密度为１．３５ｇ／ｃｍ３的矿渣膨润土水泥浆现场试验进行了对比分析。结果表明，超低密度矿渣水泥浆流变性好，体系稳定，水泥石抗压强度高，因而能提高低压易漏地层的油气井二级固井的固井质量，且能大大降低固井成本。
In the light of blast furnace slag (BFS)/bentonite cement slurry,BFS/MTC cementing technology and universal (drilling) fluid (UF) cementing technology, three ultra low density cement systems, BFS/bentonite, BFS/MTC and BFS/UF with a density range of 1 20-1 35 g/cm 3 are developed by using BFS and floating beads to deal with inadequacy of cement top and poor cementing when using light weight (1 40-1 60 g/cm 3 ) slurry for cementing thief zones of low pressure encountered also in two stage cementing operation of gas wells. The compressive strength, setting time, rheology and stability of the three cement systems are compared and analyzed Both laboratory experimemts and field tests are carried out on the rheology, stability and compressive strength of the 3 systems The results from field test of ultra low density BFS cement slurry are analyzed showing its excellent rheology, high stability and compressive strength and the capability to reduce greatly the cementing cost and to increase the cementing quality in thief zones of low pressure as well as in two stage cementing operation of oil and gas wells
出处
《江汉石油学院学报》
CSCD
北大核心
1999年第1期48-50,共3页
Journal of Jianghan Petroleum Institute
关键词
固井
水泥浆
高炉
矿渣水泥浆
超低密度
cementing
cement slurry
blast furnace slag(BFS)
cementing quality
