Research On The Physical Properties And Percolation Mechanism Of Tight Sandstone Reservoir In Daqing Oilfield

There is the extremely abundant heavy oil resource in the Bohai area,and it is difficult to use "steam stimulation" and "steam flooding" and other land oil field commonly used thermal development measures in the condition of low oil prices currectly due to the investment of offshore heavy oil field construction and high cost of post-operation.In recent years,a kind of "O / W" type emulsion to reduce the viscosity of heavy oil mining technology by oil science and technology personnel attention,some mine test also achieved better oil precipitation effect.In view of the actual demand for the development of ordinary heavy oil reservoirs in Bohai Sea,this paper takes physical chemistry,reservoir engineering and macromolecule materials as the theoretical guidance,and uses instrument detection,chemical analysis and physical simulation as the technical means to extract the emulsion viscosity Rate and output ratio were used as evaluation indexes.The oil and water reservoirs in BZ25-1s field were used as the experimental platform to carry out the screening,performance evaluation and concentration optimization of the micro-interface enhanced dispersion system,and the flooding efficiency and flooding study on physical simulation of oil effect.