Oil well dispersive wax-proofing agent and preparation method thereof

A wax-repellent and oil well technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as difficult promotion, difficulty in on-site addition, and limited range of use of oil-based wax removers, and achieve hot-washing cycles prolonged effect

Active Publication Date: 2009-09-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most commonly used oil-based wax remover has a quick effect, is the most widely used, and has a wide source of raw materials, but the oil-based wax remover is not suitable for oil wells with high water content, and the expected effect of wax removal and prevention cannot be achieved after adding the drug
Moreover, the safety of oil-based wax removers is poor, and the scope of use of oil-based wax removers is more and more limited
[0003] At present, wax removal and anti-wax in oil fields are mainly based on wax removal, supplemented by wax control, and the wax control work is relatively weak. At the same time, conventional wax control agents use EVA or 18-21 alkyl 18-21 ester as the main raw material , but this kind of anti-wax agent has a low freezing point and is in a solid state. It is difficult to add it on site, and it is not easy to promote

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The weight percent of each component of the oil well dispersing wax inhibitor is:

[0048] 1. Alkylphenol polyoxyethylene ether (industrial product): 5.2%;

[0049] 2. Sorbitan monolaurate polyoxyethylene ether (industrial product): 9.3%;

[0050] 3. Potassium chloride (industrial product): 0.55%;

[0051] 4. Fluorocarbon surfactant FN-3 (industrial product): 0.06%;

[0052] 5. Vitamin C (industrial product): 0.55%;

[0053] 6. Polyoxyethylene alkylphenol ether carboxylic acid sodium salt (industrial product): 10.5%;

[0054] 7. 6-Chlorobenzotriazole-1,1,3,3-tetramethyluronium hexafluorophosphate: 0.006%;

[0055] 8. Water: 73.834%.

[0056] Preparation:

[0057] First, add alkylphenol polyoxyethylene ether, sorbitan monolaurate polyoxyethylene ether, polyoxyethylene alkylphenol ether carboxylate sodium salt into the enamel reaction kettle in proportion. Slowly raise the temperature to 58°C. Secondly, add 5% of the water that needs to be added under constant sti...

Embodiment 2

[0059] Embodiment 2: preparation process is identical with embodiment 1, and each component weight percentage of oil well disperse wax inhibitor is:

[0060] 1. Alkylphenol polyoxyethylene ether (industrial product): 5.7%;

[0061] 2. Sorbitan monolaurate polyoxyethylene ether (industrial product): 8.8%;

[0062] 3. Potassium chloride (industrial product): 0.63%;

[0063] 4. Fluorocarbon surfactant FN-3 (industrial product): 0.07%;

[0064] 5. Vitamin C (industrial product): 0.65%;

[0065] 6. Polyoxyethylene alkylphenol ether carboxylic acid sodium salt (industrial product): 11%;

[0066] 7. 6-Chlorobenzotriazole-1,1,3,3-tetramethyluronium hexafluorophosphate: 0.007%;

[0067] 8. Water: 73.143%.

[0068] Effect: The preparation method and application method of the oil well dispersing wax inhibitor are carried out according to the above-mentioned preparation method and application method. After 8 oil wells with a water content of 40-65% and a wax content of 17-22.5% were t...

Embodiment 3

[0069] Embodiment 3: preparation process is identical with embodiment 1, and each component weight percentage of oil well disperse wax inhibitor is:

[0070] 1. Alkylphenol polyoxyethylene ether (industrial product): 6.4%;

[0071] 2. Sorbitan monolaurate polyoxyethylene ether (industrial product): 8.0%;

[0072] 3. Potassium chloride (industrial product): 0.74%;

[0073] 4. Fluorocarbon surfactant FN-3 (industrial product): 0.08%;

[0074] 5. Vitamin C (industrial product): 0.72%;

[0075] 6. Polyoxyethylene alkylphenol ether carboxylic acid sodium salt (industrial product): 12.3%;

[0076] 7. 6-Chlorobenzotriazole-1,1,3,3-tetramethyluronium hexafluorophosphate: 0.008%;

[0077] 8. Water: 71.752%.

[0078] Effect: The preparation method and application method of the oil well dispersing wax inhibitor are carried out according to the above-mentioned preparation method and application method. After trial use in 6 oil wells with water content of 50-65% and wax content of 22...

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Abstract

The invention relates to an oil well dispersive wax-proofing agent which is applicable to wax proofing of a petroleum well. The invention is characterized in that the oil well dispersive wax-proofing agent comprises the following ingredients according to weight percentage: 5-7% of polyoxyethylenealkylphenol ether, 6.5-9.5% of sorbitan mono lauryl alcohol polyoxyethylene ether, 0.5-1.0% of potassium chloride, 0.05-0.1% of fluorocarbon surfactant FN-3, 0.5-1.0% of Vitamin C, 10-15.5% of polyoxyethylene alkylphenol ether carboxylic sodium, 0.005-0.01% of 6-chlorobenzotriazole-1,1,3,3-tetramethylcarbamidehexafluoroosphate, and the allowance of water. The invention has the effects that for an oil well with water content of high than 30%, the oil well dispersive wax-proofing agent can prolong the thermal cleaning cycle of the oil well by 2-4.5 times when the adding amount is 0.05-0.1% in daily oil well maintenance.

Description

technical field [0001] The invention belongs to the technical field of chemicals used in the petroleum industry, in particular to an oil well dispersed wax inhibitor and a preparation method thereof. It is an oil well dispersing wax inhibitor that prevents wax deposition in oil wells and prolongs the hot washing cycle and pump inspection cycle of oil wells. Background technique [0002] During the exploitation of waxy crude oil in my country, in the production process of oil wells, due to the wax deposition in the oil wells, the upward load and downward resistance of the pumping wells increase, which easily causes the sucker rod to break, and at the same time increases the energy consumption of oil production. The solutions are generally mechanical wax scraping, hot oil (water) wax removal, chemical wax removal, thermal cable wax removal, magnetic wax removal, glass coating tubing wax removal, and bacterial wax removal. These methods have been field tested on a large scale....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524
Inventor 付亚荣付丽霞李造吉李冬青吴泽美蔡远红解宏伟蒲祥金游靖牛宝歧陈宝新孙学峰吴蓓勤姚为有
Owner PETROCHINA CO LTD
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