Quantitative prediction of oil saturation of unconsolidated sandstone reservoir based on time-lapse seismic “relative difference method”: Taking Zeta oil field in West Africa as an example

LU Hongmei,XU Hai,WO Yujin,GU Ning

Fig. 5. Forward modeling of time-lapse seismic. a and b are seismic forward modeling of a thin layer sandstone model with a thickness of 10 m in the background of shale, the sandstone reservoir in Fig. 5a is full of oil, and the fluid in Fig. 5b transited gradually from oil only to water only from the right of the model to the left. Fig. 5c shows the seismic reflection residuals of Fig. 5a model and Fig. 5b.