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.

齐40块蒸汽驱先导试验取得了较为理想的开发效果，但由于受油藏非均质性的影响，蒸汽驱过程中出现了蒸汽波及效率低、稳产时间短等现象。

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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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For the reservoir with high water cut, alternative injection of gas and solution can improve sweep efficiency, increase producing reserves and recovery factor.

采用气液交替注入技术可以提高高含水油藏的波及效率，改善油层的动用程度，达到提高原油采收率的目的。

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