Technology for Enhancing Oil Recovery and Tapping the Potentialfor High Water-cut Offshore Oilfields——By Taking An Offshore Oilfield for Example

Compared with onshore oilfields,higher precision was needed and bigger difficulty was faced at the late stage of high water-cut development of offshore oilfields.By taking a offshore Oilfield for example and according to the analysis of reservoir geology and development features,based on Q-Marine seismic data,the technology using time migration seism of the residual oil distribution,PP-PS joint pre-stack inversion technology and the technology of comprehensively characterizing the reservoir heterogeneity were used to describe the spatial distribution of sand body and reservoir heterogeneity and predict the distribution of residual oil.On the basis stated above an oilfield development strategy of directional wells with multiple targets as well as multilateral horizontal wells is proposed.And consequently good result is acquired for potential tapping.