As
    low-grade faults have great influence on remaining oil distribution and injection-production
    relation, an accurate distribution of these minor faults is one of considerable
    interests in mature field development. After poststack seismic data are
    processed by high frequency enhancement and seismic attribute are obtained from
    ant tracking, the authors use a joint well-seismic interpretation to
    characterize low-grade faults with above 2-meter fault throw in the working area.
    This low-grade fault interpretation has been proven by well production
    information. The study demonstrates that this joint well-seismic interpretation
    has great potential to improve the minor geologic body delineation for the
    mature field development stage.