Abstract：As development goes on, the Huizhou A oilfield in the South China Sea shows characteristics of extra-high water cut and extra-high recovery, so that the remaining oil is globally scattered and locally enriched. After conducting 3.5D and T-L seismic survey based on dual-azimuth high-quality 3D seismic technology, and carrying out rock physical analysis, prestack time-lapse data processing and spatial dynamic production information interpretation, the distribution of the remaining oil was investigated based on the relationship of seismic amplitude and dynamic information of reservoir production during the later development stage of the oilfield. The seismic result has been applied to update the pressure-depleting development plan in the Huizhou A oilfield. New wells show high recovery and help to produce the remaining oil.
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