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Dissolving method of hydrophobically associating polymer and special stretching device thereof

A technology of hydrophobic association and stretching device, which is applied in the direction of mixing methods, dissolution, chemical instruments and methods, etc., can solve the problems of accelerating the dissolution rate of hydrophobic association polymers and the inability to completely dissolve the solid powder of hydrophobic association polymers, etc. To achieve the effect of increased recovery and high application value

Active Publication Date: 2011-05-18
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, at normal temperature (20-25°C), the solid powder of the hydrophobic association polymer cannot be completely dissolved in water by conventional methods.
[0003] At present, research work on the solubility of hydrophobically associated polymers has been carried out (Han Ming, Xiang Wentao, Zhang Jian. China Offshore Oil and Gas. 2006, 18(1): 28-30; Wang Ying, Ye Zhongbin, Shu Zheng. Offshore Oil .2007, 27 (2): 42-44), the dissolution time of the hydrophobic association polymer under the existing method is more than 120 minutes, which means that there must be a large volume and number of curing tanks to ensure the complete dissolution of the polymer. Dissolution, for offshore platforms with limited space and load-bearing capacity, especially the existing small platforms, it is almost impossible to continue to expand the scale of polymer flooding. Therefore, it is necessary to shorten the dissolution time of hydrophobic association polymers. Accelerates the dissolution rate of hydrophobically associated polymers

Method used

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  • Dissolving method of hydrophobically associating polymer and special stretching device thereof
  • Dissolving method of hydrophobically associating polymer and special stretching device thereof
  • Dissolving method of hydrophobically associating polymer and special stretching device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1, stretching device

[0029] The structural representation of stretching device of the present invention is as figure 2 As shown, each mark in the figure is as follows: 1 belt pulley, 2 adjusting ring, 3 moving grinding wheel, 4 fixed grinding wheel, 5 impeller, 6 inlet, 7 outlet, 8 base.

[0030] The stretching device of the present invention comprises a fixed grinding wheel 4 arranged on a base 8, a movable grinding wheel 3 arranged inside the fixed grinding wheel 4, and its lower part is a circular platform; a distance is provided between the movable grinding wheel 3 and the fixed grinding wheel 4; The top of 3 is provided with an adjustment ring 2, by rotating the adjustment ring 2, the distance at the narrowest point between the movable grinding wheel 3 and the fixed grinding wheel 4 can be adjusted within the range of 150 μm-500 μm, and the remaining distances are not equidistant; The movable grinding wheel 3 is provided with radial grinding teeth (n...

Embodiment 2

[0032] Embodiment 2, the dissolution of hydrophobic association polymer AP-P4

[0033] The flow chart of the dissolving process of this embodiment is as figure 1 shown. The marks in the figure are as follows: 9 pool, 10 centrifugal pump, 11 flow meter, 12 mixing tank, 13 screw pump, 14, 15 stretching device, 16 aging tank.

[0034] The stretching device 14 and the stretching device 15 used in this embodiment are all the stretching devices described in embodiment 1; the distances at the narrowest points between the movable grinding wheel and the fixed grinding wheel in the two stretching devices are respectively 400 μm and 200 μm.

[0035] The brine in the pool 9 is heated to 35°C, and the brine is pumped into the mixing tank 12 under the action of the centrifugal pump 10, and a flow meter 11 is connected between the centrifugal pump 10 and the mixing tank 12 to control the flow rate of the brine; Next, the hydrophobic association polymer AP-P4 powder is quickly mixed with sal...

Embodiment 3

[0038] Embodiment 3, the dissolving of hydrophobic association polymer AP-P4

[0039] The flow chart of the dissolving process of this embodiment is as figure 1 shown. The marks in the figure are as follows: 9 pool, 10 centrifugal pump, 11 flow meter, 12 mixing tank, 13 screw pump, 14, 15 stretching device, 16 aging tank.

[0040] The stretching device 14 and the stretching device 15 used in this embodiment are all the stretching devices described in embodiment 1; the distances at the narrowest points between the movable grinding wheel and the fixed grinding wheel in the two stretching devices are respectively 500 μm and 168 μm.

[0041] The brine in the pool 9 is heated to 45°C, and the brine is pumped into the mixing tank 12 under the action of the centrifugal pump 10, and a flow meter 11 is connected between the centrifugal pump 10 and the mixing tank 12 to control the flow rate of the brine; Next, the hydrophobic association polymer AP-P4 powder is quickly mixed with sa...

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Abstract

The invention discloses a quick dissolving method of a hydrophobically associating polymer and a special stretching device thereof. The stretching device comprises a fixed grinding wheel fixed on a base and a moving grinding wheel arranged in the fixed grinding wheel, wherein a space is preserved between the moving grinding wheel and the fixed grinding wheel; the top of the moving grinding wheel is provided with a regulating ring; the moving grinding wheel is provided with grinding teeth; the bottom of the moving grinding wheel is provided with an impeller, and the impeller is arranged in theinner cavity of the base; the fixed grinding wheel is provided with an entrance corresponding to the moving grinding wheel; and the base is provided with an exit corresponding to the impeller. The invention also provides a method for applying the stretching device to dissolve the hydrophobically associating polymer. The hydrophobically associating polymer obtained by using the method can be used for a polymer flooding technologies under a high mineralization condition so as to improve the recovery efficiency of petroleum.

Description

technical field [0001] The invention relates to a dissolving method of an acrylamide polymer and a special stretching device thereof, in particular to a dissolving method of a hydrophobic association polymer and a special stretching device thereof. Background technique [0002] China National Offshore Oil Corporation took the lead in using hydrophobic association polymers in the polymer flooding test of the Bohai Oilfield. After 7 years of field tests, it has achieved obvious effects of increasing oil and reducing water. Hydrophobic association polymer is a kind of polymer with a small amount of hydrophobic groups on the hydrophilic macromolecular chain. When the concentration of the polymer in the aqueous solution reaches a certain level, the hydrophobic effect of the hydrophobic group makes the polymer associate. Combined, the hydrodynamic volume is increased, resulting in an obvious viscosity-increasing effect. In salt water, the hydrophobic association is enhanced, show...

Claims

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Application Information

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IPC IPC(8): B01F3/10B01F13/10B01F7/16B01F23/47
Inventor 姜伟张健刘立伟赵文森向问陶周薇
Owner CHINA NAT OFFSHORE OIL CORP
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