Abstract: The Dongying sag is located in southeastern part of the Jiyang Depression. A study has been made on main rock types, type of reservoir space, physical characteristics and affecting factors of the glutenite reservoirs in northern Yongxin area in the Dongying sag based on core observation, thin section analysis, physical property analysis, scanning electron microscopy. The results show that the glutenites are of a low compositional maturity and textural maturity, and the reservoir spaces are intergranular corroded hollow, moldic pore and cementing corroded hollow. The dominant factors affecting physical characteristics of the reservoirs include burying depth, diagenism and sedimentary facies, of which the burying depth serves as a fundamental factor affecting physical properties of the reservoirs.