自愈合水泥在浅海固井中的应用研究

摘要

According to the actual situation of the shallow cementing,the self-healing properties of self-healing cement is studied.The experiment used simulated seawater to slurry mixing,and tested the compressive strength recovery and the permeability declines of the cement under different curing temperature and medium.Under the curing temperature of 50 ℃ and 70 ℃,the cement,s compressive strength recovery and permeability decline under the simulated seawater conservation are more than 100％ ; in crude oil curing,cement,s compressive strength recovery and permeability decreased more than 90％.%针对浅海固井的实际情况,研究了自愈合水泥的自愈合性能.实验利用模拟海水配浆,并测试了水泥石试件在模拟海水、原油、不同温度养护下的抗压强度的恢复情况及其渗透率的下降情况.实验结果表明,在50℃、70℃养护温度下,模拟海水养护中的水泥石试件抗压强度恢复和渗透率的下降均超过了100％；在原油养护下的水泥石试件抗压强度恢复和渗透率的下降均达到了90％以上.