将中国东部老油田长期水驱开采中引起的储层物性变化换算成速度变化时，发现这种速度变化明显大于只计算水置换油时所引起的速度变化。根据这一特征，可利用地震资料来预测剩余油的分布。应 用时间推移地震求取水驱开采前后两次三维地震的振幅差异时，由于突出了流体的地震响应差异，比直接应用常规地震油气检测技术预测剩余油分布更为有效，而模型和实例也证明了该方法的可行性。最后，提出了一种利用时间推移地震进行叠前含油饱和度反演并预测剩余油分布的更为精确的方法。

The velocity contrast caused by the reservoir property variation in long period of water flood recovery in the old fields of eastern China is obviously greater than that caused by oil displacement water．So seismic data can be used to predict the remaining oil distribution．Time lapse seismic is applied to obtain the 3D seismic amplitude difference before and after water flood recovery．Because of the seismic response difference of fluids．it is more effective than conventional hydrocarbon detection technology to identify the remaining oil distribution．The model and application show that practicability of time lapse seismic for predicting remaining oil distribution．Finally an approach is proposed that using time lapse seismicis to carry out pre-stack.