常规多层油藏在注水开发时由于各储层物性差异特别是渗透率的差异，会引起各储层油水前缘的指进现象。
Different characteristic of oil bearing strata, especially permeability contrast can arise fingering of the water oil frontal during waterflooding stage in a regular multilayer reservoir.
注水开发后期胜坨油田三角洲前缘反韵律厚油层剩余油分布复杂。
Residual oil distribution is complicated in the thick reverse rhythm reservoir in the delta front of Shengtuo oilfield in late waterflooding stage.
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