Steam drive pilot test in Block Qi40 has achieved ideal development result, but the sweep efficiency is low and stable production period is short because of reservoir heterogeneity.
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。
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The sweep efficiency of an oil reservoir plays a decisive role in the course of oil production and the ultimate recovery in a large heterogeneous oil reservoir with complex geological structure.