CPC G01V 9/005 (2013.01) [G01N 15/04 (2013.01); G01N 15/08 (2013.01); G01N 21/03 (2013.01)] | 15 Claims |
1. A simulation method performed in a simulation device for liquid sulfur-gas-water multiphase flow comprising:
a first simulation method:
(1) production of a microfluidic chip:
1) manufacturing a casting body slice by extracting a core rock sample from an actual reservoir stratum, and extracting a pore crack structure through microscope imaging;
2) etching the microfluidic chip according to the pore crack structure to produce a glass plate etching microscopic model;
3) gluing the other glass plate having an injection hole and a fluid extraction hole through vacuum bonding to obtain a microfluidic chip representing a real reservoir pore structure;
(2) saturating the liquid sulfur in the microfluidic chip:
placing the microfluidic chip in a high-temperature high-pressure visible reaction kettle, filling a sulfur intermediate container with sulfur powder, heating and melting the sulfur powder to a liquid sulfur state, and injecting the liquid sulfur into the microfluidic chip at high temperature until the liquid sulfur is saturated;
(3) cleaning the pipeline with nitrogen gas:
closing the connection route of the microfluidic chip and the three-way valve, and simultaneously opening the branch on the other side, so that the three-way valve is in direct communication with the back-pressure valve; nitrogen gas in the gas intermediate container bypasses the microfluidic chip along the branch and through the three-way valve, and directly flows into a recovery device through the back-pressure valve to clean the residual liquid sulfur in the processing pipeline until no liquid sulfur is generated in the recovery device; to avoid the influence of the liquid sulfur in the pipeline on the sulfur saturation in the micro-fluid control chip when the liquid sulfur is displaced by nitrogen gas;
(4) simulation of gas drive liquid sulfur:
adjusting a three-way valve, such that the three-way valve is in communication with the microfluidic chip, injecting nitrogen gas into the microfluidic chip, and acquiring a simulated state of gas-liquid sulfur two-phase flow through a high-speed camera;
(5) washing the pipeline with water:
closing the connection route of the three-way valve and the microfluidic chip, and simultaneously opening the branch on the other side, so that the three-way valve is in direct communication with the back-pressure valve; the water in the water intermediate container bypasses the microfluidic chip along the branch and through the three-way valve, and directly flows into a recovery device through the back-pressure valve to clean the residual gas in the processing pipeline until no obvious bubble is generated in the recovery device; to avoid the influence of the residual gas in the pipeline on the gas-liquid sulfur saturation in the microfluidic chip when the residual gas is displaced by water;
(6) liquid sulfur-gas-water three-phase simulation under the condition of driving the gas-liquid sulfur with water:
adjusting the three-way valve, such that the three-way valve is in communication with the microfluidic chip, injecting distilled water into the microfluidic chip, and acquiring a simulated state of liquid sulfur-gas-water three-phase flow through the high-speed camera;
or, a second simulation method:
the method is performed after steps (1) to (3) of the first simulation method:
(7) liquid sulfur-gas-water three-phase flow simulation under the condition of gas-water alternate injection:
the step is performed after steps (1) to (3), alternately opening a water intermediate container and a gas intermediate container to carry out the gas-water alternate displacement until the stable state, and acquiring a simulated state of liquid sulfur-gas-water three-phase flow through the high-speed camera;
the simulation device for liquid sulfur-gas-water multiphase flow comprising an injection unit, a high-temperature high-pressure visible reaction kettle, and a data acquisition unit;
the injection unit comprises an intermediate container, the intermediate container comprising a sulfur intermediate container, a water intermediate container, and a gas intermediate container;
the high-temperature high-pressure visible reaction kettle comprises a microfluidic chip, and the high-temperature high-pressure visible reaction kettle is connected with one end of the intermediate connector through a three-way valve G, to inject the fluid of the intermediate connector into the microfluidic chip through a connecting pipeline;
the data acquisition unit comprises a high-speed camera arranged right above the high-temperature high-pressure visible reaction kettle, and a computer connected with the high-speed camera, in order to observe the fluid changes in the microfluidic chip with real-time imaging.
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