内源菌激活营养成分在石英砂上的吸附行为

Static and dynamic Absorption of nourishment used in stratal microflora activation on quartzite sand

为了确定微生物采油所用营养成分在地层中的损耗情况,在模拟油藏条件下,分别利用浸泡法和物质平衡法研究了微生物采油中内源菌激活常用营养组分(葡萄糖、硝酸钾、磷酸二氢钾)在石英砂上的静态和动态吸附作用。实验结果表明:3种组分中葡萄糖的静态吸附量和动态滞留量最高,分别为8.5×10-4和8.9×10-4,而硝酸钾和磷酸二氢钾的吸附较弱,其静态吸附量与动态滞留量都仅在1×10-4左右;动态吸附实验中,注入营养液1.5VP(VP为孔隙体积)时,岩心各组分的出口质量浓度接近入口质量浓度,转水驱2VP时,出口质量浓度接近0,表明动态驱替时吸附作用较弱。

In order to determine the exhaustion of nourishment components applied in microbial enhanced oil recovery （ ME- OR）, the static and dynamic absorption of the conventional nourishment components used in stratal microflora activation （glucose, potassium nitrate and potassium dihydrogen phosphate ） on quartzite sand were studied by methods of dipping in and mass balance under simulative formation conditions. The results show that there is little difference between static absorp- tion power of individual component and its dynamic holdup. Among the three components, the glueose＇s static absorption power and dynamic holdup are maximal, reaching 8.5 ×10^-4 and 8.9×10^-4 respectively, whereas, the absorption power and dynamic holdup of potassium nitrate and that of potassium dihydrogen phosphate are all very little, only about 1 ×10^-4 . And in the dynamic absorption experiments, individual component concentration in effluent liquid is approach to that in injec- ting liquid when the nourishment volume injected reaches 1.5 times of porosity volume（ Vp ）. Its concentration in effluent liq- uid is close to 0 after shifting to water flooding about 2Vp, which suggested that dynamic absorption of the three components on sand core is slight.