Abstract: The structure of C6 faulted block is complicated, the type of sedimentary microfacies is various, and horizontal and vertical heterogeneity were serious during adopting a stratum development. The output of oilfield fell quickly because water cut had risen, oilfield had prematurely entered the middle-high water cut stage, and development effect became poor. Aiming at low water displacement recovery, we use geology, reservoir and exploration to research oil potential. The technique of the subdivision of series of strata development is also used to adjust well pattern, and this adjustment achieves superior result.