Experimental device for researching morphology of oil displacement foam in seepage and migration processes
An experimental device and foam technology, applied in the field of experimental devices for visually studying the migration of foam flooding systems in porous media, can solve the problems of invisible foam structure, complicated seepage migration, and unsatisfactory experimental results, etc. The effect of controlling and changing temperature, convenient customization, and low device cost
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Embodiment 1
[0022] In this example, participate figure 1 with figure 2 , An experimental device used to study the foam seepage migration process morphology for oil flooding, mainly composed of a transparent casing 8 and a piece of sand core 7 assembled to form a transparent model tube device 5 that can observe the macroscopic morphology of the foam seepage migration process, transparent sleeve The tube 8 is made of glass, so that the sand core 7 is set at the set position of the inner cavity of the transparent casing 8, and the inner cavity of the transparent casing 8 is divided into two sections to form a single-layer oil-permeable rock layer simulation system. The sand core 7 adopts A piece of G0 type sand chip, the sand core 7 is a disc shape, the outer shape of the sand core 7 is consistent with the inner cavity shape of the transparent sleeve 8, the outer size of the sand core 7 can be adapted to fix the sand core 7 to the transparent sleeve 8 At the middle position of the inner cavit...
Embodiment 2
[0029] This embodiment is basically the same as the first embodiment, and the special features are:
[0030] In this embodiment, see image 3 In the transparent casing 8, the sand core 7 is composed of 4 G0 type sand chips, and the multiple sand cores 7 are installed in the transparent casing 8 at equal intervals.
[0031] Under the conditions of temperature control at 50℃, atmospheric pressure and 30000 mg / L total salinity, 500ml of the pre-configured 0.5wt.% sodium alpha-olefin sulfonate AOS solution was injected into the water source device 3 as simulated formation water, and then Input into the foam generator 2 through the water pump 4, embed and fix 4 G0 sand chips at a middle distance in the transparent sleeve 8, adjust the water pump 4 to inject the formation water into the foam generator 2 at a flow rate of 6ml / min, and the air-saving source device 1 The gas-liquid volume ratio is adjusted to 2:1, and the migration state of the foam during the whole process is observed and ...
Embodiment 3
[0033] This embodiment is basically the same as the previous embodiment, and the special features are:
[0034] In this example, participate Figure 4 In the transparent casing 8, the sand core 7 is composed of 3 sand chips, respectively G0, G1, and G2 sand chips. The multiple sand cores 7 are installed in the transparent casing 8 at equal intervals.
[0035] Under the conditions of room temperature, normal pressure and 30000 mg / L total salinity, 500ml of the pre-configured compound formula solution with a total concentration of 0.5wt.% is injected as simulated formation water into the water source device 3, and then input through the water pump 4 Into the foam generator 2, the model tube is embedded in the middle distance and fixed with G0, G1, and G2 sand chips in sequence. The water pump 4 is adjusted to inject the formation water into the foam generator 2 at a flow rate of 6ml / min, and the gas flow rate of the air-saving source device 1. , Adjust the gas-liquid volume ratio to ...
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