Abstract: Es_2 10 sand group in He-4 block of Haojia oilfield in Dongying sag is a deep-water turbidite fan deposit,with rapid lateral changes,strong heterogeneity and good pore-permeability correlation,and it is a medium-pore-permeability reservoir.The reservoir types of Es_2 10 sand group are mainly of fault block reservoir,fault-lithologic reservoir and lithologic reservoir,which are distributed near He-4 fault and its derived fault and at the high position of the long axis anticline,while the sand bodies of each main oil layer are not connected.The accumulation and distribution of oil and gas are controlled by the structural amplitude fault and sedimentary microfacies.