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Foam lift chemical agent diluents, preparation method and application thereof

A foam lifting and diluent technology, applied in the field of foam lifting chemical agent diluent, can solve problems such as difficult injection, oil casing corrosion, interference with foaming agent foaming ability, etc., to achieve low toxicity and small production safety hazards Effect

Active Publication Date: 2014-04-02
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the ground construction environment temperature is high, it is usually diluted with water. However, if it is diluted with water in winter, it will freeze at low temperature and it is not easy to inject
[0003] Due to the long-term low-temperature environment of the ground pipeline, hydrates are easily formed at the place where the diameter of the ground pipeline changes, and ice blockage occurs, which interferes with daily production
[0004] In addition, the content of chloride ions in the formation water is often high, which will cause corrosion to the oil and casing immersed in it for a long time; in order to solve the corrosion problem of the oil and casing, corrosion inhibitors are usually injected, and some corrosion inhibitors often interfere with the foaming agent foaming ability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The consumption of each raw material component in the foam lifting chemical agent diluent CQS-3-1 of this embodiment is as follows:

[0026] Liquid phase (1L): water 35%, propylene glycol 65%; solid phase: sodium molybdate 5.5g / L, orthophosphate 0.25g / L, zinc sulfate 0.3g / L.

[0027] Weigh a certain amount of sodium molybdate, orthophosphate and zinc sulfate according to the calculated amount, then add water and propylene glycol in sequence, and finally stir at a constant speed of 200 rpm to form a uniform mixed liquid.

[0028] The corrosion inhibition efficiency was measured to be 82.3% by indoor static hanging piece weight loss method.

[0029] Mix the obtained formula solution with the foaming agent at a mass ratio (4-6): 1, place it in a high-low temperature alternating test box with a constant temperature of -40°C, and store it in a freezer for 72 hours. After taking it out, it is observed that its fluidity has no Change, no freezing phenomenon.

Embodiment 2

[0031] The consumption of each raw material component in the foam lifting chemical agent diluent CQS-3-2 of this embodiment is as follows:

[0032] Liquid phase (1L): water 35%, propylene glycol 65%; solid phase: sodium molybdate 5g / L, orthophosphate 0.2g / L, zinc sulfate 0.4g / L.

[0033] Weigh a certain amount of sodium molybdate, orthophosphate and zinc sulfate according to the calculated amount, then add water and propylene glycol in sequence, and finally stir at a constant speed of 200 rpm to form a uniform mixed liquid.

[0034] The corrosion inhibition efficiency was measured to be 80.4% by indoor static hanging piece weight loss method.

[0035] Mix the obtained formula solution with the foaming agent at a mass ratio (4-6): 1, place it in a high-low temperature alternating test box with a constant temperature of -40°C, and store it in a freezer for 72 hours. After taking it out, it is observed that its fluidity has no Change, no freezing phenomenon.

Embodiment 3

[0037] The consumption of each raw material component in the foam lifting chemical agent diluent CQS-3-3 of this embodiment is as follows:

[0038] Liquid phase (1L): water 35%, propylene glycol 65%; solid phase: sodium molybdate 4g / L, orthophosphate 0.3g / L, zinc sulfate 0.2g / L.

[0039] Weigh a certain amount of sodium molybdate, orthophosphate and zinc sulfate according to the calculated amount, then add water and propylene glycol in sequence, and finally stir at a constant speed of 200 rpm to form a uniform mixed liquid.

[0040] The corrosion inhibition efficiency was measured to be 82.1% by indoor static hanging piece weight loss method.

[0041] Mix the obtained formula solution with the foaming agent at a mass ratio (4-6): 1, place it in a high-low temperature alternating test box with a constant temperature of -40°C, and store it in a freezer for 72 hours. After taking it out, it is observed that its fluidity has no Change, no freezing phenomenon.

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PUM

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Abstract

The invention relates to a foam lift chemical agent diluents, preparation method and application thereof. The liquid phase components in the diluents comprise the following components by weight percentage: 30-50% of water, 50-70% of propylene glycol and the total weight of the liquid phase components is 100%. The solid phase dissolved matters in the diluents comprises the following components by weight percentage: 3-6 g / L of sodium molybdate, 0.1-0.3 g / L of orthophosphate and 0.2-0.4 g / L of zinc sulfate.

Description

technical field [0001] The invention relates to a diluent of foam lifting chemical agent, its preparation method and application. Background technique [0002] During the foam drainage gas recovery process, the foam lifting chemical agent is usually diluted to a certain ratio to prevent excessive loss when the concentration is too high. When the ground construction environment temperature is high, it is usually diluted with water. However, if it is diluted with water in winter, it will freeze at low temperature and it is difficult to inject. [0003] Due to the long-term low-temperature environment of the surface pipeline, hydrates are easily formed at the place where the diameter of the surface pipeline changes, and ice blockage occurs, which interferes with daily production. [0004] In addition, the content of chloride ions in formation water is often high, which will cause corrosion to the oil and casing immersed in it for a long time; in order to solve the corrosion pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/54
CPCC09K8/584
Inventor 刘治坚熊春明李文魁李隽
Owner PETROCHINA CO LTD
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