注入水性质对中东地区碳酸盐岩油藏驱油效果的影响
发布时间：2018-07-27 15:00
【摘要】：中东地区碳酸盐岩储层以孔隙介质为主,注水是未来重要的开发方式,而注入水的性质影响了注水提高采收率的效果。利用中东地区M层碳酸盐岩油藏岩心,通过改变注入水矿化度、钙离子和硫酸根离子质量浓度,研究注入水性质对驱油效果的影响。结果表明,随着注入水矿化度的减小,水驱采收率增大;降低矿场注入水中钙离子质量浓度或相对比例、增加矿场注入水中硫酸根离子质量浓度或相对比例,均有利于提高水驱采收率,改善驱油效果。矿场注水过程中可以通过改变注入水矿化度和离子质量浓度提高驱油效果,还须进一步结合现场水源水量及其他限制条件优选注入水源。
[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.
【作者单位】： 中国石油勘探开发研究院;中国科学院渗流流体力学研究所;北京拓普莱博油气田开发技术研究院;中国石油青海油田公司勘探开发研究院;
【基金】：中国石油科技重大专项“中国石油海外油气上产2亿吨开发关键技术研究”(2011E-2501)
【分类号】：TE357.6
[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.
【作者单位】： 中国石油勘探开发研究院;中国科学院渗流流体力学研究所;北京拓普莱博油气田开发技术研究院;中国石油青海油田公司勘探开发研究院;
【基金】：中国石油科技重大专项“中国石油海外油气上产2亿吨开发关键技术研究”(2011E-2501)
【分类号】：TE357.6
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