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首页> 外国专利> METHOD FOR OIL RESERVOIR DEVELOPMENT AT LATER STAGE BY WATER-GAS HYDRODYNAMIC ACTION DURING PERIODICAL GASEOUS PHASE DISPERSION CHANGE

METHOD FOR OIL RESERVOIR DEVELOPMENT AT LATER STAGE BY WATER-GAS HYDRODYNAMIC ACTION DURING PERIODICAL GASEOUS PHASE DISPERSION CHANGE

机译：周期性气态相散变化过程中水-气动力作用在后期开发储层的方法

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FIELD: oil production, particularly enhanced recovery methods for obtaining hydrocarbons.;SUBSTANCE: method involves determining oil-saturated thickness distribution pattern; periodically operating highly-flooded well located in zones with decreased oil-saturated thickness; operating wells with increased oil-saturated thickness at accelerated fluid production regimes; injecting water-gas dispersed mixture through injection wells, wherein the water-gas dispersed mixture includes reservoir water and purified oil gas dispersed in water; periodically changing water-gas dispersed mixture dispersion. First of all water-gas dispersed mixture having bubble dimensions comparable with pore channel dimensions flushed with water is injected up to 2-6.1% reduction of water content in produced fluid. Then water-gas dispersed mixture with gas bubbles comparable with capillary and sub-capillary oil-containing pore channels is injected to provide 0.5-2.5% increase of water content in produced fluid. Said water-gas dispersed mixture dispersion alternation is maintained during total injection period.;EFFECT: increased oil recovery due to extended reservoir coverage with treatment and improved displacement efficiency.;1 tbl, 1 ex
机译：领域：石油生产，特别是用于获得碳氢化合物的提高采收率的方法。在油饱和厚度减小的区域中定期运行高注水井;在油液加速开采时增加油饱和厚度的油井;通过注入井注入水气分散混合物，其中水气分散混合物包括储集水和分散在水中的纯净油气。定期改变水气分散混合物的分散度。首先，将气泡尺寸与用水冲洗的孔道尺寸相当的水-气分散混合物注入，最多可减少产出液中水含量的2-6.1％。然后注入具有可与毛细管和子毛细管含油孔通道相媲美的气泡的水-气体分散混合物，以使采出液中的水含量增加0.5-2.5％。所述水-气分散的混合物的分散交替在整个注入期间得以维持。效果：由于扩大了油藏覆盖范围并进行了处理并提高了驱替效率，因此提高了石油采收率; 1 tbl，1 ex

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