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Wanchang and Liangjia structural belts are the important hydrocarbon accumulation zones in Chaluhe faulted depression��controlled by different structures in the process of formation and evolution�� The Wanchang structural belt is controlled by the basin-controlled fault in southeastern margin��while the Liangjia structural belt is controlled by the No. 2 fault��which led to different sand facies�� According to drilling core��well-logging and seismic data��the fan delta in Wanchang structural belt and underwater fan deposits in Liangjia structural belt are the domain sandstone sediments in shallow Wanchang Formation�� The continuity and physical property of sand bodies in Wanchang Formation are good��especially��the distributary channel and braided channel sand near to provenance have higher porosity and permeability�� The source rocks are well developed in Shuangyang-��Sheling- and Yongji formations�� Basin-controlled faults and their derivative faults help the hydrocarbon migration and sealing�� Therefore�� the hydrocarbon accumulation are great in conditions��