Study On Reservoir Modeling And Numerical Simulation For Fractured Sandstone Reservoir In Block Shishen-100 In Shinan Oilfield

The establishment of model for low permeable sandstone reservoir is emphasized on numerical simulation model for fracture system. Took the low permeable sandstone reservoir of middle part of the third member of Shahejie formation (Es3 for short) in Block Shishen-100, in Shinan oilfield, Dongying sag as an example, in view of fracture developing features in this kind of reservoir, by way of drilling core observation and logging interpretation, the thesis carried out detailed fracture detection and description. Based on mechanical testing data of abundant drilling samples, the thesis established rock mechanical model, and took fracture developing degree and scale as connection, the thesis established quantitative relationship between microfracture properties and stress field, as well as quantitative relationship between physical properties and stress field. During integrated study of stress field modelling and numerical reservoir modelling, the thesis explained how to establish 3-dimensional reservoir model for low permeable sandstone reservoir in aspects of fracture network coupling, shape factor, fracture porosity, directional permeability of fracture, and model for reservoir bed matrix. By way of history matching, the thesis reconstructed exploitation history of middle part of Es3 reservoir in Block Shishen-100, and determined area with big potential of residual oil. Consequently, test area for close spacing well pattern is suggested. The thesis pointed out that technical adjustment such as well pattern thickening can greatly improve developing effect in middle part of Es3 reservoir in Block Shishen-100.