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首页> 外文会议>International conference on computational and experimental methods in multiphase and complex flow >Pore-scale observation of surfactant flooding for weekly water-wet porous media: the effect of gas injection to improve oil recovery
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Pore-scale observation of surfactant flooding for weekly water-wet porous media: the effect of gas injection to improve oil recovery

机译：每周水润湿的多孔介质中表面活性剂驱的孔径观测：注气改善采油率的效果

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Surfactant flooding is one of the effective methods to produce trapped oil after water flooding. Surfactant is injected into reservoirs to reduce the interfacial tension between the trapped oil and water. However, at the pore scale, the mechanism of how the injected surfactant reaches the interface through the stagnant water adjacent to the interface has not been completely explained yet. This research provides new insights into the transport phenomena of multiphase flow in porous media using two-dimensional micro-model curved on a quartz glass plate. When the surfactant is injected after water flooding, stagnant water which extends a few pores from the interface, hampers the arrival of the surfactant. It is found that gas injection before the surfactant flooding increases the oil recovery with reducing amount of injected surfactant. Injected gas flows through the water and there is no direct effect on oil production. However, during the successive surfactant flooding, the gas bubbles are trapped in porous media which changes the flow of surfactant to reach the interface of the trapped oil.
机译：表面活性剂驱油是注水后采出油的有效方法之一。将表面活性剂注入储层中，以减少被困油和水之间的界面张力。然而，在孔隙尺度上，尚未完全解释注入的表面活性剂如何通过与界面相邻的死水到达界面的机理。这项研究使用在石英玻璃板上弯曲的二维微观模型，对多孔介质中多相流的传输现象提供了新的见解。当注水后注入表面活性剂时，停滞的水从界面延伸出一些孔，阻碍了表面活性剂的到达。发现在表面活性剂驱入之前的气体注入增加了石油采收率，同时减少了注入的表面活性剂的量。注入的气体流经水，对产油没有直接影响。然而，在连续的表面活性剂驱油期间，气泡被捕获在多孔介质中，这改变了表面活性剂的流量以到达所捕获的油的界面。

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