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Foaming agent with low foam moisture content and preparation method thereof

A technology of foaming agent and water content, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of unfavorable long-term mining, large gas lift investment, large damage, etc., achieve good foam stabilization effect, reduce surface The effect of small tension and film thickness

Active Publication Date: 2022-05-13
成都华阳兴华化工有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Gas lift has a large investment and high cost; while venting will cause great damage to the gas well and the area near the well, which is not conducive to long-term mining

Method used

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  • Foaming agent with low foam moisture content and preparation method thereof
  • Foaming agent with low foam moisture content and preparation method thereof
  • Foaming agent with low foam moisture content and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A foaming agent with low foam moisture content, which is composed of the following components in percentage by weight: 35% dioctylmethylhydroxysulfopropyl betaine, 1% sodium perfluorooctanesulfonate, polyethylene glycol 6000 4% and water 60%.

[0020] The preparation method comprises the steps of: mixing 35% by weight of dioctylmethyl hydroxysulfopropyl betaine and 60% by weight of water in a reaction vessel with constant temperature stirring and mixing, and then adding 4% by weight of poly Ethylene glycol 6000 was reacted for 0.5 h; after adding 1% by weight sodium perfluorooctane sulfonate and continuing to stir for 15 min, a foaming agent with low foam moisture content was obtained.

Embodiment 2

[0022] A foaming agent with low foam moisture content, consisting of the following components in percentage by weight: 38% dioctylmethylsulfopropyl betaine, 0.3% sodium perfluorooctanesulfonate, polyethylene glycol 6000 2% and water 59.7%. The structural formula of dioctylmethylhydroxysulfopropyl betaine is as follows figure 1 shown.

[0023] A method for preparing a foaming agent with a low foam moisture content, comprising the steps of stirring 38% by weight of dioctylmethyl sulfopropyl betaine and 59.7% by weight of water in a reaction vessel at constant temperature Mix evenly, then add 2% by weight of polyethylene glycol 6000 to react for 2 hours; add 0.3% by weight of sodium perfluorooctane sulfonate and continue stirring for 40 minutes to obtain a foam discharge agent with low foam moisture content.

Embodiment 3

[0025] A foaming agent with low foam moisture content, consisting of the following components in percentage by weight: 40% dioctylmethylsulfopropyl betaine, 0.4% sodium perfluorooctanesulfonate, polyethylene glycol 6000 1% and water 58.6%.

[0026] A method for preparing a foaming agent with a low foam moisture content, comprising the steps of: 40% by weight of dioctylmethyl sulfopropyl betaine and 58.6% by weight of water in a reaction vessel at a constant temperature of 50°C Stir and mix well, then add 1% by weight polyethylene glycol 6000 and react for 1 hour; add 0.4% by weight sodium perfluorooctane sulfonate and continue stirring for 30 minutes to obtain a foam discharge agent with low foam moisture content.

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Abstract

The invention discloses a foaming agent with low foam water content and a preparation method thereof. The foaming agent is composed of the following components in weight percent: dioctylmethyl hydroxysulfopropyl betaine 35%-40% , sodium perfluorooctane sulfonate 0.1%-1%, polyethylene glycol 6000 1%-4% and water 55%-60%; the preparation method comprises the steps of: adding dioctylmethylhydroxysulfopropyl Betaine and water were stirred and mixed evenly in a reaction vessel at a constant temperature, then polyethylene glycol 6000 was added to react for 0.5-2 hours; sodium perfluorooctane sulfonate was added and stirring was continued for 15-40 minutes to obtain a foaming agent with low foam moisture content. The invention can effectively improve the bottom hole flow pressure lower than 10MPa and gas well flow rate lower than 5000m 3 / d under the ultra-low pressure and low production conditions, the effect of foaming operation is poor.

Description

technical field [0001] The invention belongs to the technical field of foaming agents for oil and gas fields, and in particular relates to a foaming agent with low foam moisture content and a preparation method thereof. Background technique [0002] In the middle and late stages of natural gas well development, formation energy decreases, and formation water enters the near-wellbore area or wellbore with the natural gas flow, and accumulates there, resulting in a decline in gas well production or even being drowned by water. In the technical series of water drainage gas recovery technology, bubble drainage technology has attracted more and more attention due to its advantages of convenient construction, simple equipment, low cost, wide range of applicable well depth, quick return, and no influence on normal production of gas wells. It is one of the most economical and effective methods to increase natural gas production and extend the production cycle of gas wells. By addin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 曹焕尧张宁波郭柏序李佳欣杨修直罗凯鲁光亮严小勇
Owner 成都华阳兴华化工有限公司
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