To
    better probe the laws of distribution of oolitic shoal which lies in the
    platform margin of Feixianguan Formation, Sichuan Basin to facilitate the
    exploration and development on the oolitic shoal gas pool, this paper analyses
    the development properties and distribution law of platform margin shoal by
    means of case study of northeastern region of Sichuan basin, after which it
    points out that this type of oolitic shoal expands in the direction of NW-SE
    along the platform margin and stretches in “finger-shape” to the platform
    interior from which two groups of positive faults basement cross in directions
    of NE and NW, while the extension direction of the “fingershape” is vertical to
    the platform margin.