考虑黏土矿物影响的湿相-非湿相置换实验

通过天然岩心与人工岩心的岩心渗吸实验结果分析,黏土矿物的存在对渗吸作用存在影响.利用玻璃管填充不同比例黏土矿物和石英砂,可视化观察和测量湿相置换量和气-液界面前缘突进速度,实验采用2％、3％、5％含量黏土矿物和纯石英砂填充做对比发现,纯石英砂湿相置换量为88.96％,5％含量黏土矿物湿相置换量为69.22％.黏土矿物含...

Experimental study on wet-non-wet phase replacement considering the influence of clay minerals

Through the analysis of the core imbibition experiment results of natural core and artificial core, the existence of clay mineral has an influence on imbibition. Using glass tubes to fill different proportions of clay minerals and quartz sand, visually observe and measure the amount of wet phase replacement and gas-liquid leading edge penetration rate. The experiment used 2%, 3%, 5% content of clay minerals and pure quartz sand as a comparison to find, The pure quartz sand wet phase replacement amount is 88.96%, and the 5% content clay mineral wet phase replacement amount is 69.22%. When the clay mineral content is 5%, the replacement time required is 2.29 times that of pure quartz sand, and the amount of wet phase replacement is 77.8% of pure quartz sand. Clay minerals swell after contact with deionized water, and the amount of wet phase replacement decreases with increasing clay mineral content. Adding KCL to the wet phase can effectively inhibit the expansion of clay minerals and increase the replacement rate of the wet phase. The experimental results show that in the 5% clay mineral filled tube experiment, the 4% concentration of KCL solution is added to the wet phase, and the final wet phase replacement rate is close to pure quartz. Sand wet phase replacement rate.