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Foam drainage foaming agent for normal-pressure shale gas development and preparation method thereof

A foam drainage and shale gas technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as poor salt resistance of foaming agents, achieve enhanced foam stabilization performance, enhanced liquid carrying capacity, and enhanced stability sexual effect

Active Publication Date: 2021-08-17
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of poor salt tolerance of foaming agents in the prior art, the present invention provides a foam drainage foaming agent for normal pressure shale gas development and a preparation method thereof to solve the above problems

Method used

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  • Foam drainage foaming agent for normal-pressure shale gas development and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A foam drainage foaming agent for normal pressure shale gas development, comprising the following components in parts by weight: sodium dodecylsulfonate 4g, sodium dodecylbenzenesulfonate 1g, nonylphenol polyoxyethylene ether 2g , polyvinyl alcohol 3g, Tween 80 4g, EDTA 2g, triethanolamine 5g (viscosity is 590cP, 25°C), ammonium carbonate 7g, water 72g.

[0020] The preparation method is: add water to the reaction kettle, control the temperature at 20-30°C, add 5g of triethanolamine under stirring, and then add 4g of sodium dodecylsulfonate, 1g of sodium dodecylbenzenesulfonate, poly Dissolve 3g of vinyl alcohol and 7g of ammonium carbonate, add 4g of Tween 80, 2g of EDTA and 2g of nonylphenol polyoxyethylene ether after dissolving, stir evenly and let stand to obtain a foam drainage foaming agent for shale gas development at normal pressure.

Embodiment 2

[0022] A foam drainage foaming agent for normal pressure shale gas development, comprising the following components in parts by weight: sodium dodecylsulfonate 5g, sodium dodecylbenzenesulfonate 2g, nonylphenol polyoxyethylene ether 1g , 0.5 g of octylphenol polyoxyethylene ether, 3 g of polyvinyl alcohol, 5 g of Tween 80, 2 g of EDTA, 5 g of triethanolamine (viscosity of 590 cP, 25° C.), 8 g of ammonium carbonate, and 68 g of water.

[0023] The preparation method is as follows: add water to the reaction kettle, control the temperature at 20-30°C, add 5g of triethanolamine under stirring, and then add 5g of sodium dodecylsulfonate, 2g of sodium dodecylbenzenesulfonate, poly Vinyl alcohol 3g and ammonium carbonate 7g, after dissolving, add Tween 80 5g, EDTA 2g, nonylphenol polyoxyethylene ether 1g and octylphenol polyoxyethylene ether 0.5g, stir evenly and let stand to obtain normal pressure shale gas Development of blowing agents for foam drainage.

Embodiment 3

[0025] A foam drainage foaming agent for normal pressure shale gas development, comprising the following components in parts by weight: sodium dodecylsulfonate 7g, sodium dodecylbenzenesulfonate 1g, octylphenol polyoxyethylene ether 1g , polyvinyl alcohol 3g, Tween 80 4g, EDTA 2g, triethanolamine 6g (viscosity is 590cP, 25°C), ammonium bicarbonate 5g, water 71g.

[0026] The preparation method is as follows: add water to the reaction kettle, control the temperature at 20-30°C, add 6g of triethanolamine under stirring, and then add 7g of sodium dodecylsulfonate, 1g of sodium dodecylbenzenesulfonate, poly Vinyl alcohol 3g and ammonium bicarbonate 5g, after dissolving, add 4g of Tween 80, 2g of EDTA and 1g of octylphenol polyoxyethylene ether, stir evenly and let it stand still to obtain a foam drainage foaming agent for shale gas development under normal pressure.

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Abstract

The invention relates to a foam drainage foaming agent for normal-pressure shale gas development and a preparation method thereof, and belongs to the technical field of oil and gas development. The foam drainage foaming agent for normal-pressure shale gas development comprises the following components in parts by weight: 4-10 parts of sodium dodecyl sulfate, 1-4 parts of sodium dodecyl benzene sulfonate, 1-3 parts of alkylphenol polyoxyethylene, 2-6 parts of polyvinyl alcohol, 4-5 parts of Tween 80, 1-2 parts of EDTA (Ethylene Diamine Tetraacetic Acid), 5-8 parts of triethanolamine, 5-10 parts of ammonium salt and the balance of water. By optimizing the components of the foam drainage foaming agent, the components cooperate with one another, so that the liquid carrying capacity and foam stabilizing performance of the foaming agent are enhanced, and meanwhile, the temperature resistance of the foaming agent is synergistically enhanced.

Description

technical field [0001] The invention belongs to the technical field of oil and gas development, and in particular relates to a foam drainage foaming agent for normal pressure shale gas development and a preparation method thereof. Background technique [0002] Shale gas is a kind of unconventional natural gas that exists in the organic-rich mud shale and its interlayers, mainly exists in the adsorption and free states, and is available for exploitation in shale formations. The main component is methane. A clean and efficient energy resource and chemical raw material. However, as large gas fields gradually enter the middle and late stages of development, reservoir energy tends to be insufficient, and bottomhole fluid accumulation has become a common problem faced by shale gas well production. The gas cannot bring the water at the bottom of the well to the surface, and the water gradually accumulates in the wellbore, seriously affecting the production of the gas well. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584C09K8/60
CPCC09K8/584C09K8/602C09K8/604
Inventor 李佳欣房大志刘雨薇周成香杨修直程旭程泽虎季宝林徐海涛王祁邱建玲徐壮举刘波徐涛
Owner CHINA PETROLEUM & CHEM CORP
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