Na_2CO_3在油砂中的损耗及一些离子的浓度变化

Consumption of Na_2CO_3 by Oil Sand and the Variations of Concentrations of Some Kinds of Ions

模拟了Na2CO3碱水溶液驱三次采油过程并测定了碱耗量，分析了K+，Ca2+，Mg2+，Al3+及SiO32-浓度的变化．对辽河油田油砂与Na2CO3溶液反应过程中几种离子浓度的分析表明，在碱作用下，油砂既发生一定的溶解又有再沉积过程；地层水的硬度将会影响耗碱量．

The caustic water flooding was imitated and the consumption of Na2CO3 was measured, the variations of K+, Ca2+, Mg2+, Al3+ and Si032- concentrations were also analyzed. The variations of ions' concentrations in the reactions of Na2CO3 solution with oil sand from Liaohe Oil Field indicated that the dissolution and deposition of oil sand occurred. The hardness of the water in oil reservoir will influence the alkallne consumption noticeably.