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永乐油田属构造-岩性油藏,受地层条件影响,油田开发效果逐年变差,出现了主力油层单一,严重水淹,产量大幅度递减,注水压力逐年升高,小层吸水能力变差,并导致油井排油井间剩余油不能得到有效动用。为此,考虑在永乐油田高含水、高注采比实施周期注水,降低注采比。通过高低渗透层的交互渗透作用提高油井间剩余油的动用程度。通过具体实施,总结出在永乐油田采用周期注水的适当时机及不同区块特征的效果。
Yongle Oilfield is a tectonic-lithologic reservoir. Affected by the formation conditions, the effect of oilfield development is deteriorating year by year. Single and severe flooding of main oil reservoirs occurred. The yield dropped drastically. The water injection pressure increased year by year, And lead to the remaining oil in the well row can not be effectively used. To this end, consider the Yongle Oilfield high water, high injection and injection cycles than the implementation of water injection, reducing injection-production ratio. Through the interaction of high and low permeability layers to enhance the interaction between residual oil well utilization. Through the concrete implementation, summed up the effect of periodic injection of water and the characteristics of different blocks in Yongle Oilfield.