Prepositive polymer slug displacement can decrease the effect by the formation heterogeneity, prevent the gas breakthrough and improve the displacement sweep efficiency of the injective gas.
对于地层非均质性的影响，通过注入聚合物段塞调驱，能起到防止气窜，增加注入气驱扫效率。
Third, in order to calculate microscopic sweep efficiency in pore models, we define sweep boundary of displacement fluid, and determine it by velocity method.
第三，为了计算孔隙模型的微观波及效率，本文给出了驱替液波及边界的定义，并采用速度法确定其在流场中的位置。
The results show that the sweep efficiency and displacement efficiency work different effects on different layers in the severely heterogeneous reservoir.
通过研究表明对于非均质严重的油藏，不同层段的波及效率和驱替效率所起的作用不同。
Compared to secondary recovery, it improves the sweep volume and efficiency of oil displacement by the AIDS of physical and chemical dual effect.
与二次采油相比，它借助物理和化学的双重作用，提高驱油的波及体积和效率。
In addition, using the relationship among recovery percent, displacement and volumetric sweep efficiency, the equations for estimation of the volumetric sweep efficiency and.
利用采出程度、驱油效率和体积波及系数三者关系，给出了体积波及系数与可采储量采出程度的计算公式。
Cyclic water injection development can expand sweep radius and enhance displacement efficiency.
通过多周期的注水吞吐开发，逐渐扩大水驱波及半径，提高驱替效率。
The mechanism and the extent of action of polymer solution's depleted layer effect and viscoelastic effect on displacement efficiency and sweep coefficient.
通过聚合物溶液在不同模型中的驱油实验，研究了聚合物溶液的衰竭层效应和粘弹性效应对驱油效率和波及系数的作用机理和作用程度。
The study results show that the displacement efficiency and sweep efficiency play different roles in the different layers.
研究结果表明，对于非均质性严重的油藏，不同层段的波及效率和驱替效率所起的作用不同。
The sweep efficiency and oil displacement effect of polymer flooding in seven spot and five spot patterns for single and multizone reservoirs were simulated by numerical simulation.
用数值模拟研究手段对七点法井网、五点法井网以及单油层、多油层聚合物驱的波及系数及驱油效果进行了模拟；
The result of laboratory experiments showed that the chemicals MCA improved the displacement efficiency of hot water and the sweep efficiency of steam and hot water.
化学体系中室内实验结果表明，化学体系中MCA能提高热水的驱替效率以及蒸汽和热水的波及效率。
The result of laboratory experiments showed that the chemicals MCA improved the displacement efficiency of hot water and the sweep efficiency of steam and hot water.
化学体系中室内实验结果表明，化学体系中MCA能提高热水的驱替效率以及蒸汽和热水的波及效率。
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