【摘要】：中東地區(qū)碳酸鹽巖儲層以孔隙介質(zhì)為主,注水是未來重要的開發(fā)方式,而注入水的性質(zhì)影響了注水提高采收率的效果。利用中東地區(qū)M層碳酸鹽巖油藏巖心,通過改變注入水礦化度、鈣離子和硫酸根離子質(zhì)量濃度,研究注入水性質(zhì)對驅(qū)油效果的影響。結(jié)果表明,隨著注入水礦化度的減小,水驅(qū)采收率增大;降低礦場注入水中鈣離子質(zhì)量濃度或相對比例、增加礦場注入水中硫酸根離子質(zhì)量濃度或相對比例,均有利于提高水驅(qū)采收率,改善驅(qū)油效果。礦場注水過程中可以通過改變注入水礦化度和離子質(zhì)量濃度提高驅(qū)油效果,還須進(jìn)一步結(jié)合現(xiàn)場水源水量及其他限制條件優(yōu)選注入水源。
[Abstract]:The carbonate reservoir in the Middle East is dominated by porous media, and water injection is an important way of development in the future, and the nature of injected water affects the effect of waterflooding on oil recovery. By changing the salinity of injected water, the mass concentration of calcium ion and sulfate ion, the effect of injected water properties on oil displacement effect is studied by using the core of carbonate reservoir in M layer in the Middle East region, by changing the salinity of injected water and the mass concentration of calcium ion and sulfate ion. The results show that with the decrease of the salinity of injected water, the recovery efficiency of water flooding increases, the mass concentration or relative ratio of calcium ion decreases, and the mass concentration or relative ratio of sulfate ion increases. It is beneficial to improve water flooding recovery and oil displacement effect. The oil displacement effect can be improved by changing the salinity and ion mass concentration of injected water in the process of field water injection. It is also necessary to select the optimal injection water source in combination with the field water quantity and other limited conditions.
【作者單位】： 中國石油勘探開發(fā)研究院;中國科學(xué)院滲流流體力學(xué)研究所;北京拓普萊博油氣田開發(fā)技術(shù)研究院;中國石油青海油田公司勘探開發(fā)研究院;
【基金】：中國石油科技重大專項(xiàng)“中國石油海外油氣上產(chǎn)2億噸開發(fā)關(guān)鍵技術(shù)研究”(2011E-2501)
【分類號】：TE357.6

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