Combined test device for high-temperature and high-pressure foam in-situ generation and evaluation and use method

An in-situ generation and testing device technology, applied in the direction of measuring devices, suspension and porous material analysis, instruments, etc., can solve the problem of not being able to control the gas-liquid volume ratio, not being able to know the stability and flow of the foam, and not being able to shear the foam and other issues to achieve accurate, convenient, stability and fluidity, perfect generation and stability, and real and accurate simulation conditions

Active Publication Date: 2020-05-22
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The foam generated by high-speed stirring needs to be transferred to a measuring cylinder for stability observation, and the foam transfer process has a great influence on the foam stability, and there is a large error
This method of foam generation can neither control the gas-liquid volume ratio, nor simulate the complex porous medium structure of the formation, nor allow the formed foam to pass through the shearing action of the formation pores
In short, the properties of the foam obtained by these methods cannot accurately control the gas-liquid ratio of the foam in practical applications, let alone know the stability and flow of the foam in the porous medium of the formation, and the control effect on the foam is poor
[0005] Most of the existing technologies see the generated foam through the transparent sand filling tube, but the particles in the sand filling tube are not transparent, and only the height change of the foam outside the sand filling tube can be seen, and the foam flowing through the sand filling tube and inside the sand filling tube It is difficult to observe the foam generation and changes, and it is impossible to accurately describe the state and changes of the foam
There is no such report yet

Method used

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  • Combined test device for high-temperature and high-pressure foam in-situ generation and evaluation and use method
  • Combined test device for high-temperature and high-pressure foam in-situ generation and evaluation and use method
  • Combined test device for high-temperature and high-pressure foam in-situ generation and evaluation and use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] The foaming agent is 1.0 wt% sodium lauryl polyoxyethylene ether sulfate dispersion, the temperature of the temperature control box 16 is set at 50° C., and the back pressure of the back pressure valve 12 is set at 2.0 MPa. Table 1 shows the physical parameters of the sand filling pipe 8 in this embodiment, and Table 2 shows the half-life and fluidity of the foam in this embodiment.

[0071] Table 1 Physical parameters of sand filling pipe in Example 1

[0072] Quartz grain number dry weight m 1 / g

Wet weight m 2 / g

Pore ​​volume / mL Porosity / % Permeability / μm 2

40-60 18.32 18.51 0.19 47.5 8.76

[0073] Table 2 Foam half-life and fluidity when the total gas-liquid flow rate is 0.30mL / min

[0074]

Embodiment 2

[0076] Foaming agent is 0.05wt% sodium 2-ethylhexyl succinate sulfonate / 1.0wt% nano-SiO 2 For the particle dispersion, the temperature of the temperature control box 16 is set at 50° C., and the back pressure of the back pressure valve 12 is set at 4.0 MPa. Table 3 shows the physical parameters of the sand filling pipe 8 in this embodiment, and Table 4 shows the half-life and fluidity of the foam in this embodiment.

[0077] Table 3 Physical parameters of sand filling pipes in Example 1

[0078] Quartz grain number dry weight m 1 / g

Wet weight m 2 / g

Pore ​​volume / mL Porosity / % Permeability / μm 2

60-80 18.33 18.53 0.20 46.3 8.21

[0079] Table 4 Foam half-life and fluidity when the total gas-liquid flow rate is 0.30mL / min

[0080]

Embodiment 3

[0082] The foaming agent is 0.05wt% monododecyl phthalate sodium salt / 0.008wt% welan gum dispersion, the temperature of the temperature control box 16 is set to 50°C, and the backpressure valve 12 is set to a backpressure of 4.0MPa . Table 5 shows the physical parameters of the sand filling pipe 8 in this embodiment, and Table 6 shows the half-life and fluidity of the foam in this embodiment.

[0083] Table 5 Physical parameters of sand filling pipes in Example 2

[0084] Quartz grain number dry weight m 1 / g

Wet weight m 2 / g

Pore ​​volume / mL Porosity / % Permeability / μm 2

80-100 18.35 18.56 0.21 46.0 7.82

[0085] Table 6 The fluidity and stability of foam when the total gas-liquid flow rate is 0.30mL / min

[0086]

[0087]

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Abstract

The invention discloses a combined test device for high-temperature and high-pressure foam in-situ generation and evaluation and a use method. The device comprises a foam in-situ generation system, ameasurement system and a back pressure system. The foam in-situ generation system comprises a gas transmission channel and a liquid transmission channel; the measuring system comprises a sand filled pipe, a high-pressure visual container and a capillary pipe; the back pressure system comprises a water storage intermediate container, a back pressure valve, a pump and a first water storage apparatus. After foams are generated in situ, the real state of the foams in the stratum can be observed more visually through the high-pressure visual container under the condition that the environment is notchanged, foam related data can be obtained accurately without any interference, and a more stable pressure environment is provided by additionally arranging the water storage intermediate container in front of the back pressure valve.

Description

technical field [0001] The invention relates to the field of oilfield chemistry, in particular to a combined testing device for in-situ generation and evaluation of high-temperature and high-pressure foam and a method for using it. Background technique [0002] Foam is a dispersion system in which gas is dispersed in liquid. It bursts when it encounters oil and is stable when it encounters water. It has the performance of selectively blocking oil and water; it can effectively inhibit the gas from rushing in and slow down the breakthrough time; it can block high-permeability layers and effectively expand Fluid sweeping volume, thereby improving oil displacement efficiency, is one of the very promising tertiary oil recovery technologies. [0003] When evaluating the performance of foams, the measurement method has a great influence on the results. Different measurement methods may obtain different results, and different evaluation methods have different interpretations of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00G01N11/00G01N15/08
CPCG01N33/00G01N11/00G01N15/088G01N15/0826
Inventor 徐龙祝仰文姜祖明宫厚健王卫东李亚军桑茜董明哲戚佳伟
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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