Foaming agent for oilfield, and preparation method thereof

A foaming agent, oil field technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of low foaming volume, unusable, poor foam stabilization effect, etc., and achieve high foaming volume and fine foam. Stable, high-quality foaming effect

Inactive Publication Date: 2017-02-22
富象油气技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problems that the existing foaming agents used in oilfields have low foaming volume, poor foam stabilization effect, and cannot be used under high salinity and high temperature conditions.

Method used

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  • Foaming agent for oilfield, and preparation method thereof
  • Foaming agent for oilfield, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 25kg of α-alkenyl sulfonate (AOS), 10kg of alkylphenol polyoxyethylene ether carboxylate (APEC), and 80kg of fatty alcohol polyoxyethylene ether sodium sulfate into the reaction kettle, and add ten Dialkyl dimethyl amine oxide 30kg, tetradecyl dimethyl betaine 10kg, glycerol 3kg, stirred for 0.4 hours;

[0016] Continue to add 842kg of water in the kettle and continue stirring for 0.8 hour to obtain a temperature-resistant and salt-resistant foaming agent for oilfields.

[0017] The performance test of the foaming agent used in normal temperature operation, the foam volume produced by the foaming agent prepared in this example is the most ideal when the concentration is 0.3% and the temperature is 50 ° C. When the concentration exceeds 0.3%, the foam volume is no longer The increase or increase is not obvious, so the performance of the foaming agent is the best at a concentration of 0.3% and a temperature of 50°C. The performance is as follows:

[0018]

Embodiment 2

[0020] Weigh 30kg of α-alkenyl sulfonate (AOS), 20kg of fatty alcohol polyoxyethylene ether salt (AEC), and 80kg of fatty alcohol polyoxyethylene ether sodium sulfate into the reaction kettle. While stirring, add twelve Alkyl dimethyl amine oxide 30kg, tetradecyl dimethyl betaine 10kg, glycerol 3kg, stirred for 0.4 hours;

[0021] Continue to add 135kg of methanol and 692kg of water to the kettle and continue to stir for 0.8 hours to obtain a temperature-resistant and salt-resistant foaming agent for oilfields.

[0022] Through the performance test of the foaming agent for antifreeze operation, the foam volume produced by the foaming agent prepared in this example is the most ideal when the concentration is 0.3% and the temperature is 50°C. When the concentration exceeds 0.3%, the foam volume is no longer The increase or increase is not obvious, so the performance of the foaming agent is the best at a concentration of 0.3% and a temperature of 50°C. The performance is as foll...

Embodiment 3

[0025] Weigh 2 parts of alkylbenzene sulfonate, 3 parts of fatty alcohol polyoxyethylene ether carboxylate, and 60 kg of fatty alcohol polyoxyethylene ether sodium sulfate into the reaction kettle, stir evenly, and then add dodecyl dimethyl Amine oxide 20kg, tetradecyl dimethyl betaine 10kg, glycerol 1kg, stirred for 0.4 hours;

[0026] B. Add 570 kg of water into the kettle and continue to stir for 0.8 hours to obtain a foaming agent for oil fields.

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PUM

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Abstract

The invention provides a foaming agent for an oilfield. The foaming agent is prepared from the following raw materials in parts by weight: 2-6 parts of a sulfonic acid group-containing surfactant, 3-8 parts of a carboxylic acid group-containing surfactant, 6-12 parts of fatty alcohol polyoxyethylene ether sodium sulfate, 2-5 parts of N,N-dimethyldodecylamine-N-oxide, 1-6 parts of tetradecyl-2-dimethyl betaine, 0.1-0.8 part of glycerol, 0-15 parts of methanol, and 57-72 parts of water. The invention further provides a preparation method of the foaming agent for the oilfield. The foaming agent for the oilfield introduces the sulfonic acid group and the carboxylic acid group, the reasonable compounding of the sulfonic acid group and carboxylic acid group can play a synergistic effect, and ultra-low oil-water interfacial tension can be achieved under high salinity. The foaming agent can be used for oil-gas field development operation of production well acidification, oil-gas well pigging and washing, gas well fracturing, gas well drainage gas recovery and the like, and has the characteristics of being resistant to temperature, strong in salt-resistant capability, high in foaming number, high in foaming quality, fine and stable in foam, and compatible with other auxiliaries used in the oilfield.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development engineering, and in particular relates to a foaming agent for oil fields and a preparation method thereof. Background technique [0002] In the oil well acidizing operation, it is necessary to add a certain concentration of foaming agent in the well flushing fluid, which is beneficial to the surface and interfacial tension of the working fluid and increases the scope of the acidizing operation. Reduce the pump pressure, and the foam generated at the same time will also carry out the insoluble dirt and small particles in the wellbore, thereby improving and restoring the production of the oil well. [0003] Adding foaming agent in the gas production process of gas wells is beneficial to reduce the surface tension of formation water and the density of wellbore liquid column, improve the flow state of water and gas, and achieve the purpose of drainage and gas production. Reduce ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C09K8/536C09K8/584C09K8/70
CPCC09K8/035C09K8/536C09K8/584C09K8/703
Inventor 衣保钢何德文郭子龙郭玉山郑书东李牧
Owner 富象油气技术服务有限公司
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