Apparatus and method for measuring elastic turbulence characteristics of viscoelastic polymer in porous medium

Abstract

The invention relates to an apparatus and method for measuring elastic turbulence characteristics of a viscoelastic polymer in a porous medium, wherein a side connector of a fluorescent microscope of the apparatus is connected to a CCD (couple charged device) camera, a saline container, a polymer solution container and a synthetic oil container that are connected with an oil / water container are parallelly connected between an inlet of a micro metering pump and an inlet of a two-dimensional mesh microscopic simulation model, the two-dimensional mesh microscopic simulation model is provided with an inlet pressure sensor and an outlet pressure sensor, and a light guide arm of a micro field particle image speed-measuring system is positioned right above the two-dimensional mesh microscopic simulation model; all the micro field particle image speed-measuring system, the fluorescent microscope, the inlet pressure sensor and the outlet pressure sensor are connected to a data graphic data station. The apparatus and method are capable of effectively recognizing elastic turbulence of viscoelastic polymer solution in porous medium seepage, and providing qualitative and quantitative description for elastic turbulence characteristics.

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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