水泥浆加重剂Micromax在缅甸Pyay油田的应用

为优选出一种既便于现场使用又有利于提高固井质量的高密度水泥浆加重剂,对常用的几种水泥浆加重剂性能进行了分析,选择了挪威E lkem公司生产的M icrom ax作为水泥浆密度加重剂,介绍了其物理性能和优点,与钛铁矿粉进行了性能对比试验,基于室内水泥浆性能数据,用现场水泥浆、现场水进行了配伍性试验以及加量对流变性、稳定性和强度的影响试验研究。研究表明:M icrom ax配制的高密度水泥浆综合性能明显优于重晶石和铁矿粉;M icrom ax自身稳定性好,水泥浆密度易于调节,具有直角稠化效果,水泥石强度高,与其他外掺料和外加剂有良好的配伍性,在不具备干混装置的情况下可以加入水中使用。在缅甸PSC-101、PSC-2井两口井中采用该加重剂进行打塞和固井作业5次,应用效果良好,具有很好的推广应用前景。

Application of heavyweight additive micromax to Pyay Oilfield in Burma

To select out a kind of high-density heavyweight additive for cement slurry favorable for field application and upgrading cementing,properties of several types of heavyweight additives commonly used are analyzed in this paper.Finally,Micromax developed by Elkem Company in Norway is selected as the heavyweight additive for density of cement slurry.In this paper,physical properties and advantages of Micromax are introduced,as well as comparative test is conducted on properties between Micromax and ilmenite powder.According to cement slurry properties data acquired in the lab,compatibility performance test and experimental research on the effect of Micromax addition on rheological properties,stability,and strength of cement slurry are conducted by using water and cement on site.Research shows that comprehensive properties of high-density cement slurry developed by using Micromax are superior to that of barite and iron ores.Micromax features in good stability.High-density cement slurry developed by using it has good rheological properties,adjustable density,right angle coagulation effect,and high strength of cement paste.It is well compatible with extra materials and agents.If there are no dry mixing devices,cement slurry can be added into water.Micromax has been utilized for plugging and cementing operation for five times in PSC-101 and PSC-2 wells in Burma and good application results have been obtained.It has broad prospect for popularization and application.