Antisludging agent for preventing deposition of Sr/Ba scale

A technology of scale inhibitor and strontium scale, which is applied in the field of chemicals used in the petroleum industry, can solve the problems of low scale prevention efficiency and low efficiency, and achieve the effect of prolonging the pump inspection period.

Active Publication Date: 2012-12-12
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anti-scaling efficiency of this kind of polymer to calcium carbonate and calcium sulfate is not as good as that of organic polyphosphonic acid. Although it has anti-scaling effect on barium sulfate and strontium sulfate, the efficiency is low

Method used

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  • Antisludging agent for preventing deposition of Sr/Ba scale
  • Antisludging agent for preventing deposition of Sr/Ba scale

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: the weight percent of each component of the antiscalant that prevents barium strontium scale deposition is:

[0051] 1. Dodecylamino ethyl phosphate (industrial product): 8.5%;

[0052] 2. Tetradecylaminoethyl phosphate (industrial product): 8.9%;

[0053] 3. Disodium salt of ethylenediaminetetraacetic acid (industrial product): 6.5%;

[0054] 4. Tetrasodium ethylenediamine tetrapropionate (industrial product): 2.5%;

[0055] 5. Ethylenediamine tetramethylene phosphonic acid (industrial product): 3.6%;

[0056] 6. Vitamin A (industrial product): 0.06%;

[0057] 7. Vitamin C (industrial product): 0.07%;

[0058] 8. Potassium iodide (industrial product): 0.006%;

[0059] 9. α-amino-3-methylbutyric acid (industrial product): 0.0005%;

[0060] 10. Aspartic acid (industrial product): 0.0005%;

[0061] 11. Water: 69.863%.

[0062] Its preparation method is:

[0063] First, add dodecylaminoethyl phosphate and tetradecylaminoethyl phosphate into the ename...

Embodiment 2

[0065] Embodiment 2: the weight percent of each component of the antiscalant that prevents barium strontium scale deposition is:

[0066] 1. Dodecylamino ethyl phosphate (industrial product): 9%;

[0067] 2. Tetradecylamino ethyl phosphate (industrial product): 8.5%;

[0068] 3. Disodium salt of ethylenediaminetetraacetic acid (industrial product): 6.2%;

[0069]4. Tetrasodium ethylenediamine tetrapropionate (industrial product): 2.7%;

[0070] 5. Ethylenediaminetetramethylenephosphonic acid (industrial product): 3.9%;

[0071] 6. Vitamin A (industrial product): 0.05%;

[0072] 7. Vitamin C (industrial product): 0.05%;

[0073] 8. Potassium iodide (industrial product): 0.005%;

[0074] 9. α-amino-3-methylbutyric acid (industrial product): 0.0006%;

[0075] 10. Aspartic acid (industrial product): 0.0007%;

[0076] 11. The remainder is water; the sum of the weight percentages of each component is 100% (water is 69.5937%).

[0077] The preparation method of embodiment 2 i...

Embodiment 3

[0079] Embodiment 3: the weight percent of each component of the antiscalant that prevents barium strontium scale deposition is:

[0080] 1. Dodecylamino ethyl phosphate (industrial product): 9.6%;

[0081] 2. Tetradecylamino ethyl phosphate (industrial product): 8%;

[0082] 3. Disodium salt of ethylenediaminetetraacetic acid (industrial product): 6%;

[0083] 4. Tetrasodium ethylenediamine tetrapropionate (industrial product): 2.8%;

[0084] 5. Ethylenediaminetetramethylenephosphonic acid (industrial product): 4.1%;

[0085] 6. Vitamin A (industrial product): 0.07%;

[0086] 7. Vitamin C (industrial product): 0.08%;

[0087] 8. Potassium iodide (industrial product): 0.008%;

[0088] 9. α-amino-3-methylbutyric acid (industrial product): 0.0007%;

[0089] 10. Aspartic acid (industrial product): 0.0008%;

[0090] 11. Water is 69.3485%.

[0091] The preparation method of embodiment 3 is identical with embodiment 1.

[0092] Effect: When the amount of antiscalant to prev...

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Abstract

The invention relates to an antisludging agent for preventing the deposition of Sr / Ba scale and the antisludging agent is used to prevent the deposition of Sr / Ba scale of an oil well during oil field production process. The antisludging agent comprises the following components by weight percent: 8.5-12% of dodecylaminoethyl phosphate, 7.5-9.0% of myristylaminoethyl phosphate, 5-6.5% of EDTA disodium salt, 2.5-3.0% of EDTP tetrasodium salt, 3.5-4.5% of ethylenediamine tetra methylenephosphonic acid, 0.05-0.08% of vitamin A, 0.05-0.12% of vitamin C, 0.005-0.01% of potassium iodide, 0.0005-0.001% of alpha-amino-3-methylbutyric acid, 0.0005-0.0010% of aspartic acid and the balance water, wherein the sum of the weight percentages of the components is 100%. The beneficial effect of the antisludging agent is as follows: when 25-30mg / l of the antisludging agent of the invention is used in the daily maintenance of the oil well, the scale preventing rate is more than 90% and the pump detection period of the oil well can be increased by more than once.

Description

technical field [0001] The invention relates to the technical field of chemicals used in the petroleum industry, in particular to a scale inhibitor for preventing barium-strontium scale deposition in oil wells during oil recovery. Background technique [0002] After some oilfields enter the medium-high water cut period, because the produced water contains barium, strontium, sulfate and carbonate ions, as the temperature of the produced fluid changes, hard barium particles are formed on the inner wall of the tubing, the surface of the sucker rod, and the inside of the oil gathering pipeline. Strontium scale. However, conventional barium-strontium scale prevention methods are ineffective, and this scale is insoluble in acid, which brings a lot of inconvenience to oilfield production management. [0003] At present, chemical antiscalants are roughly divided into three categories: amino polycarboxylates, phosphorus compounds and organic polymers. Amino polycarboxylates are a c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/528
Inventor 付亚荣靳瑛吴泽美李造吉付丽霞李冬青付茜王芳贾秀敏韩敬胡伟俐刘文欣赵尚柱
Owner PETROCHINA CO LTD
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