摘要
固井后套管水泥环地层会形成一个胶结体,即固井屏障.固井屏障在油气井生产过程中,要受到各种载荷的作用,会导致固井屏障密封系统失效.为保证井筒的完整性,目前主要的解决办法是使用胶乳水泥浆体系,但是该体系有一个较大的缺点就是用量大、费用高.室内通过优选增韧材料GBS-51,其质量分数在2%-5%变化时,水泥浆性能能够满足常规固井作业的要求.为了能够在有效保证固井屏障良好完整性的情况下,降低生产作业成本,将GBS-51与胶乳复配（其中胶乳仅起到偶联剂的作用,用量较少）,成功构建了-套高强韧性水泥浆体系,试验结果表明该韧性水泥浆体系能够有效地控制成本,且适用温度范围广,可以满足不同井底温度的固井作业,形成的水泥石韧性以及其他物理特性优良,有利于保障井筒完整性.
After cementing,a cemented body would be formed in casing-cementing-loop formation,that was called a cementing barrier,in the production of oil and gas,all kinds of loads were applied on the cementing barrier,which would induce failure of sealing system of the cementing barrier.For ensuring the integrity of the wellbore,the main solution was to use latex cement slurry system.However,The available latex systems had a large disadvantage,such as high application volume and high cost.A toughening material GBS-51 was chosen in laboratory,when its mass fraction was changed from 2%to 5%,its property could meet the demands of cementing operation.To ensure a high integrity of the cementing barrier and reduce the operation cost,the GBS-51 system was combined with latex,(which only played the role of the coupling agent,the amount was small),a set of high strength and toughness cement slurry systems were successfully built.The results show that the system can effectively control the cost and are able to satisfy different temperature ranges in cementing operation,and it has high cement toughness and other physical properties,it is favorable for ensuring the integrity of borehole.
出处
《长江大学学报（自科版）（中旬）》
2016年第6期49-53,5-6,共5页
Journal of Yangtze University(Nature Science Edition)
关键词
固井屏障
增韧材料
胶乳
固井水泥浆
cementing barrier
toughening materials
latex
cementing slurry
