Pore-scale Network Modelling Of The Complex Fault Block In Middle And High Water-cut Stage

For the purpose of exploring the complex fault block oil field perquisite transfusion rule microscopically, explores how core sample pore structure`s microscopic change in middle and high watery stage influence the flushing efficiency. In view of the oil field main oil layer in Jidong of Hebei two sub-area's real core sample's three different watery stage, uses the CT image formation technology, carries on the projection to the different angle of the real core sample, and to two-dimensional picture, uses binaryzation processing, carries on three dimensional restructuring to the gradation image, constructed the digital core, and make the identification and characterization to the pore`s and throat`s length and volume, and finally obtains the pore structure three dimensional network model through related algorithm, and make the study of the simulation of oil-water flow at the pore-level. Analyz the process of oil saturation and water displacing oil, analyz the effection of core pore struction`s microscopic parameters to the displacement effect.The analysis result indicated: The flushing efficiency enhances along with the coordination number`s, the shape factor`s, the pore width`s increases, decreases along with the contact angle`s reduction. The network model saves the experiment cost, and reduce the loss of the natural core. Laying the theoretical basis for the further description to the microscopic pore, and has the guiding sense and the application value to the research of the influence of high watery stage oil layer pore structure's change to the flushing efficiency.