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1.Because of inner-layer, interlayer and areal heterogeneity of reservoir, after a long period of water flooding, injected water circulates in high permeability channel, sweep volume cannot be enlarged, and injected water volume of per ton increases a lot.
摘要由于储层层内、层间及平面不均衡性，经过长期注水开发，导致注入水沿高渗透条带循环，很难进一步扩大波及体积，使得吨油注水量大幅度增加。收藏指正
2.A unit for measuring the displacement of ships, equal to35 cubic feet, and supposed to equal the volume taken by a long ton of seawater.
排水吨测量船舶排水量的单位，等于三十五立方英尺，相当于一长吨海水的体积收藏指正
3.Total volume of cargo transported by various means was 3,770.6 billion ton-kilometers, a decline of 1.3 percent as compared with 1997.
全年各种运输方式完成货物周转量37706亿吨公里，比上年下降1.3%。收藏指正
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