Abstract:In order to raise the effect of whole block water shut-off and profile control after polymer flooding, it needs to analyze all kinds of affecting factors,especially such as the deep ,occasion and the round of profile control, and optimise approprite parameter value. The paper does some concept model analysis to the deep,occasion and the round of profile control applying reservoir simulation means. The preliminary result indicates that it does the best while the deep of profile control is equal to the strong water flush radius and the occasion is at the moment of the valley bottom of the water cut hopper. And it can yet make the preferable effect to develop the second round or the third at the appropriate occasion after the first round whole block profile controlling.