Apparatus and method for measuring elastic turbulent flow characteristics of viscoelastic polymer in porous media

Abstract

The present invention relates to a device and method for measuring elastic turbulent flow characteristics of viscoelastic polymers in porous media, wherein the fluorescence microscope sideways interface of the device for measuring elastic turbulent flow characteristics of viscoelastic polymers in porous media is connected to a CCD camera, and is connected with oil / water The brine container, the polymer solution container, and the synthetic oil container connected to the containers are connected in parallel between the micrometering pump and the inlet of the two-dimensional network microscopic simulation model. The two-dimensional network microscopic simulation model is provided with an inlet pressure sensor and The outlet pressure sensor, the light guide arm of the micro-field particle image velocimetry system is directly above the two-dimensional mesh microscopic simulation model; the micro-field particle image velocimetry system, fluorescence microscope, inlet pressure sensor, and outlet pressure sensor are all connected to the data graphics workstation . The invention can effectively identify the elastic turbulent flow phenomenon of the viscoelastic polymer solution in the percolation flow of the porous medium, and describe the qualitative and quantitative characteristics of the elastic turbulent flow.

Description

technical field [0001] The invention relates to an experimental device for researching viscoelastic polymers, in particular to a device and method for measuring elastic turbulence characteristics of viscoelastic polymers in porous media. Background technique [0002] The evaluation and practice of my country's enhanced oil recovery (EOR) potential have proved that chemical flooding is the main method and direction of research to increase recoverable reserves, accounting for more than 70% of the reserves covered by all EOR methods, and among them, viscoelastic polymer drive is the most widely used. It is generally believed that "improving the oil-water mobility ratio, thereby enlarging the sweep coefficient" is the key to enhanced oil recovery of polymer flooding, and "the 'pull and pull' of the oil silk and the 'stripping' of the oil film under the action of elastic behavior" is the key to the enhanced oil recovery of polymer flooding. Another contribution to enhanced oil re...

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Problems solved by technology

However, this special flow phenomenon has not been considered in the current research on the microscopic seepage of porous media in polymer flooding reservoirs, and the measurement methods and devices for this flow phenomenon and its characteristics are still lacking. Therefore, forming a set of viscoelastic polymers in The measurement method of elastic turbulence characteristics in porous media and the establishment of corresponding measurement devices have become an urgent problem in the further development and application of viscoelastic polymer flooding technology under the background of greatly tapping the potential of tertiary oil recovery and improving oil recovery

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