Deepening research on the distribution characteristics of interlayers in marine sandstone reservoirs

At present, CNOOC has a large number of bottom water reservoirs developed by horizontal wells in the production oilfields, but the overall geological reserves of the oilfields are relatively low. The biggest problem facing this type of reservoir development and adjustment and tapping is the separation of the reservoir. The identification and quantitative characterization of the development characteristics of interlayer space. Therefore, in this paper, by formulating standards for the identification of barriers and intercalations, in-depth study of the profile and plane distribution characteristics of barriers and intercalations, and carrying out studies on the anatomy and characterization of the distribution of marine sandstone reservoirs. The results of the study show that the distribution of the study area on the profile is mainly composed of interlayers in the southwest and northwest of the legal person of the study area, with good connectivity and continuity. The distribution of interlayers on the plane is mainly muddy. Mainly with mezzanine, the research results in this paper are helpful to improve the accuracy of the anatomy of marine sandstone reservoir stacking relationship and the characterization accuracy of interlayer distribution, and improve the development effect of this type of reservoir.