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在75℃下系统地研究了蒙脱石、高岭石、以及蒙脱石和高岭石的复配矿物与7#碱性驱替剂(ρNa2CO3=15g·L-1)间的作用,采用分光光度法对反应后反应液中的硅铝元素质量密度进行了测定,并对两种矿物单独存在时的结果和共存时的进行了比较,结果表明因为蒙脱石在碱性驱替剂中容易析出硅元素,而高岭石在碱性驱替剂中容易析出铝元素,当二者共存时会相互抑制。并且,蒙脱石的存在会对高岭石析出铝元素产生很大的抑制作用,而高岭石的存在对蒙脱石析出硅元素的抑制作用较小,证明蒙脱石更容易与碱液反应而对整个反应起到控制作用。协同效应研究还表明,蒙脱石的作用与其质量不成比例,当加入很少的蒙脱石也会控制整个反应。这些研究对化学驱中化学剂损耗预测模型的建立具有重大的意义。
The effects of montmorillonite, kaolinite, and complex mineral of montmorillonite and kaolinite with 7 # basic displacer (ρNa2CO3 = 15g · L-1) were investigated systematically at 75 ℃. The mass concentration of Si and Al in the reaction solution after the reaction was determined by spectrophotometry. The results when the two minerals were present alone were compared with those at the time of coexistence. The results show that because montmorillonite is easy to be used in a basic displacer The silicon element is precipitated, and kaolinite easily precipitates the aluminum element in the basic displacer, and suppresses each other when they coexist. Moreover, the presence of montmorillonite will greatly inhibit the precipitation of aluminum from kaolinite, while the presence of kaolinite has less inhibitory effect on the deposition of silicon by montmorillonite, which proves that montmorillonite is easier to react with lye The reaction controls the entire reaction. Synergistic studies have also shown that the role of montmorillonite is not proportional to its mass and that the overall reaction is controlled when very few montmorillonites are added. These studies are of great significance for the establishment of chemical loss prediction models in chemical flooding.