Sand-carrying performance test device for fracturing liquid by adopting high-speed photography and digital image technologies

Abstract

The invention discloses a sand-carrying performance test device for fracturing liquid by adopting high-speed photography and digital image technologies. The sand-carrying performance test device mainly comprises an air compressor air storage tank, a temperature sensor, a liquid storage tank, a temperature controller, a high-speed photography system, a digital image processing system, a flowmeter, a needle valve, a visible simulated crack sand suspension system, a soft light box and a liquid collection tank. According to the sand-carrying performance test device for the fracturing liquid by adopting the high-speed photography and digital image technologies, sand-carrying fracturing liquid with different flowing speeds and different temperatures passes through the visible simulated crack sand suspension system by a method for driving liquid to flow through constant-pressure air; the high-speed photography system is used for catching a motion trace of sand in a crack; the digital image processing system is used for determining a settling trace and a settling speed of the sand to obtain distribution of the concentration of the suspended sand along the crack. The sand-carrying performance test device has a reliable theory, is easy to operate, can accurately test both the settling speeds of sand particles with different particle sizes in fracturing liquid under different temperatures and different flowing speeds according to different sand ratios and the concentration distribution of the sand particles in the simulated crack, and has a good market prospect.

Description

technical field [0001] The invention relates to a testing device for sand-carrying performance of fracturing fluid using high-speed photography and digital image technology. Background technique [0002] The currently known general method for testing and evaluating the sand-carrying and suspension performance of fracturing fluid is to measure the free settling velocity of proppant particles in fracturing fluid. Since the temperature and flow rate of fracturing fluid have a great influence on its suspension performance, the particles The sedimentation velocity index can only reflect the suspension capacity of the liquid macroscopically and indirectly, but cannot accurately reflect the sedimentation velocity of sand particles when the sand-carrying fracturing fluid flows in the fracture at different temperatures and flow rates, let alone test the distribution of suspended sand concentration along the fracture. Contents of the invention [0003] The object of the present inve...

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Problems solved by technology

[0002] The currently known general method for testing and evaluating the sand-carrying and suspension performance of fracturing fluids is to measure the free settling velocity of proppant particles in the fracturing fluid. Since the temperature and flow rate of the fracturing fluid have a great influence on its suspension performance, the particles The sedimentation velocity index can only reflect the suspending ability of the liquid macroscopically and indirectly, but cannot accurately reflect the sedimentation velocity of the sand particles when the sand-carrying fracturing fluid flows in the fracture at different temperatures and flow velocities, let alone test the distribution of the suspended sand concentration along the fracture

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