Key words: 
• beachbar sand body /
• effective reservoir /
• petrophysical parameter cutoff /
• controlling factors /
• Dongying Depression

Abstract: Beach and bar sandbodies are main sedimentary reservoir of the upper part of the fourth member of the Shahejie formation(Es4s) in the west part of Dongying depression. Based on the comprehensive application of physical properties, oil production test, and mercury injection data, the petrophysical parameter cutoff of effective reservoir of beach and bar sandbodies of Es4s is determined by distribution function curve method, production test method, and irreducible water saturation method, and the functional equation between petrophysical parameter cutoff and depth is obtained. On the basis of the research of petrophysical parameter cutoff, combining the analysis of sedimentary characteristics, diagenesis characteristics and reservoir pressure characteristics of beach and bar sandbodies, the controlling factors of effective reservoirs are discussed. Sedimentary microfacies and thickness are main controlling factors, and the effective reservoir is the most developed in the microfacies of bar main body and beach ridge. It is not obvious that the diagenesis and reservoir pressure influence physical properties of reservoir.