Crude oil wax-proofing bar and preparation method thereof

A technology for preventing wax and crude oil, applied in the field of oilfield chemical matching and solid wax inhibitor, can solve the problems of slow dissolution rate, insufficient wax inhibitor effect, and no solid wax inhibitor, so as to reduce labor intensity and improve the flow of crude oil. Good effect of anti-waxing and anti-waxing effect

Active Publication Date: 2010-08-11
PANJIN LIAOHE OILFIELD YULONG RUIDA PETROLEUM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solid wax inhibitors are also used in pumping wells. The existing solid wax inhibitors are mainly solid wax blocks compounded from granular polyethylene and polyethylene-ethylene-vinyl acetate copolymer (EVA). Not very severe oil wells have some effect, but because its dissolution rate is too slow, the wax control effect of many oil wells is not good enough
Since the self-flowing well cannot add liquid agents down the wellhead, there are currently methods of manually removing wax by scraping wax sheets or heating and dissolving wax by electric heating cables. There is no effective solid wax inhibitor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Prepare and prepare 1000g of anti-wax sticks, the consumption of each raw material is as follows:

[0028] Octadecyl Acrylate 50g

[0029] Behenyl Methacrylate 120g

[0030] Fatty alcohol polyoxyethylene ether 20g

[0031] Sodium dodecylbenzene sulfate 730g

[0032] Dimethylethylbenzene 80g

[0033] The production process is as follows:

[0034] (1) The stearyl acrylate, behenyl methacrylate, dimethyl ethylbenzene, fatty alcohol polyoxyethylene ether, sodium dodecylbenzene sulfate powder of the above weight ratio are sequentially mixed at room temperature Put it into a blender, mix and stir evenly, and prepare the dry agent. Prepare 100g of waxy oil samples in advance. After the dry agent is prepared, take 1g of the dry agent and add it to 100g of crude oil, stir evenly, and carry out the wax prevention and depreciation test. After confirming that it is qualified, the prepared dry agent is taken out from the agitator and ready to be pressed;

[0035] (2) Weigh 200...

Embodiment 2

[0037] Prepare and prepare 1000g of anti-wax sticks, the consumption of each raw material is as follows:

[0038] Octadecyl Acrylate 70g

[0039] Behenyl Methacrylate 150g

[0040] Fatty alcohol polyoxyethylene ether 30g

[0041] Sodium dodecylbenzene sulfate 650g

[0042] Dimethylethylbenzene 100g

[0043] The production process is as follows:

[0044] (1) The stearyl acrylate, behenyl methacrylate, dimethyl ethylbenzene, fatty alcohol polyoxyethylene ether, sodium dodecylbenzene sulfate powder of the above weight ratio are sequentially mixed at room temperature Put it into a blender, mix and stir evenly, and prepare the dry agent. Prepare 100g of waxy oil samples in advance. After the dry agent is prepared, take 1g of the dry agent and add it to 100g of crude oil, stir evenly, and carry out the wax prevention and depreciation test. After confirming that it is qualified, the prepared dry agent is taken out from the agitator and ready to be pressed;

[0045] (2) Weigh 20...

Embodiment 3

[0047] The crude oil anti-rod of the present invention is tested in four wells of Xinggu Buried Hill in Xinglongtai Oil Production Plant of Liaohe Oilfield, and the effect is remarkable. The test data table is as follows:

[0048] Hashtag

Original freezing point (°C)

Freezing point after dosing (℃)

Wax Resistant Rate (%)

Dosage (%) *

Xinggu 7-1

27

14

60.5

1

Xinggu 7-HZ02

29

19

56.6

1

Xinggu 7HZ

28

17

58.9

1

Xinggu 7-8

29

19

55.8

1

[0049] * Dosage is calculated by weight ratio.

[0050] Liaohe Oilfield standard requires wax prevention rate ≥ 50%, pour point reduction rate ≥ 6 ℃. It can be seen from the test data that the crude oil anti-rod of the present invention has a good test effect in some wells in the Xinggu buried hill of the Xinglongtai Oil Production Plant of the Liaohe Oilfield.

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PUM

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Abstract

The invention discloses a crude oil wax-proofing bar and a preparation method thereof. The wax-proofing bar comprises components in parts by weight: 5-7 parts of octadecyl acrylate, 12-15 parts of 2-methyl-2-propenoic aci docosyl ester, 8-10 parts of dimethyl ethane, 2-3 parts of fatty alcohol-polyoxyethylene ether, and 65-73 parts of sodium dodecylbenzene sulfonate; and the components are mixed uniformly and then extruded into bar shape through a forming machine. The wax-proofing bar is convenient to carry and use, and has the effects of improving crude oil flowability and reducing crude oil flow resistance, good wax-proofing effect and broad application range; and the wax-proofing bar is particularly applied to flowing well and rodless pump well, and can replace manned wax removal and electrical heating wax removal of flowing well, thereby reducing the production cost of oil field and reducing the labor intensity of worker.

Description

technical field [0001] The invention relates to chemical additives for oil recovery in oil fields, in particular to a solid anti-wax agent designed to improve the fluidity of crude oil, reduce the flow resistance of crude oil in pipelines, and prevent wax deposition in oil pipelines, which belongs to the supporting technology of oilfield chemistry. Background technique [0002] The problem of paraffin deposition is an important problem in the process of oil collection, storage and transportation. At present, the wax removal and prevention methods of oil wells mainly include physical cleaning methods such as hot washing and mechanical cleaning, and chemical wax removal methods. Compared with the physical method of removing wax and preventing wax, adding chemical wax preventing agent to downhole crude oil is a convenient and more economical method. Oil well wax remover and wax crystal dispersant at home and abroad are widely used in the production of thin oil wells. One metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524
Inventor 马冬兰于雷于立君
Owner PANJIN LIAOHE OILFIELD YULONG RUIDA PETROLEUM TECH CO LTD
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