Producing condition of poor reservoir is bad, which makes waterflood efficiency, conformance factor and final recovery efficiency low, and the development effect is bad.
差油层动用状况较差，导致油田水驱效率和波及系数较低，最终采收率低，开发效果差。
These researches have great significance for preventing aqueous phase trapping damages and improving waterflood efficiency in the course of drilling, completion and development.
在钻井完井及开发过程中防止水相圈闭损害，提高水驱效率具有重要意义。
Waterflood system efficiencies are made up with the average operation efficiency of motors, water injection pumps and pipe networks.
注水系统效率由电机平均运行效率、注水泵平均运行效率和管网运行平均效率组成。
After the analysis of the existing problems during waterflood development in this oil field, ways to the improvement of waterflood development efficiency were suggested.
在分析该油田注水开发中存在问题的基础上，提出了改善油田注水开发效果的途径。
Wettability is an important factor controlling the distribution of the oil, it strongly affects capillary pressure, relative permeability, waterflood behavior and efficiency.
润湿性是控制这些剩余油分布的一个重要因素，它强烈影响着砾岩油藏水驱动态、毛管压力和相对渗透率。
Polymer flooding can enhance the oil displacement efficiency through enhancing the water-out degree. But it is very difficult to decrease the waterflood remaining oil.
可通过提高水洗程度来提高驱油效率，但降低水驱残余油的难度很大。
Polymer flooding can enhance the oil displacement efficiency through enhancing the water-out degree. But it is very difficult to decrease the waterflood remaining oil.
可通过提高水洗程度来提高驱油效率，但降低水驱残余油的难度很大。
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