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Temperature-resistant and salt-resistant foaming agent and preparation method and application thereof

A temperature-resistant, salt-resistant, and foaming agent technology, applied in the field of foaming agents, can solve the problems of foaming performance affected by temperature, foaming ability, bubble stability, and natural gas recovery rate, etc., to achieve good bubble stability , increase the effect of association, improve high temperature resistance

Pending Publication Date: 2021-01-22
KARAMAY SANDA NEW TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the drainage problem of formation water with high salinity (for example, the salinity of formation water in gas field wells in Karamay, Hutubi and other places can reach 150000mg / L), most of the existing foaming agents cannot Ensuring its drainage effect will seriously affect the life of the gas field and reduce the recovery rate of natural gas
At the same time, the foaming performance of the existing foaming agent is greatly affected by temperature, and the foaming ability and the stability of the bubbles of the foaming agent will be significantly reduced at higher temperatures (higher than 90 ° C).

Method used

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  • Temperature-resistant and salt-resistant foaming agent and preparation method and application thereof
  • Temperature-resistant and salt-resistant foaming agent and preparation method and application thereof
  • Temperature-resistant and salt-resistant foaming agent and preparation method and application thereof

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preparation example Construction

[0043] The present invention also provides a preparation method of the temperature-resistant and salt-resistant foaming agent described in the above technical solution, comprising the following steps:

[0044] Mix maleic acid, lauryl alcohol, p-toluenesulfonic acid, salicylic acid, isoamyl alcohol, sodium lauryl sulfate, cationic fluorocarbon surfactant and water to obtain the temperature-resistant and salt-resistant foaming agent.

[0045] In the present invention, the mixing process preferably includes the following steps:

[0046] Maleic acid and lauryl alcohol are first mixed to obtain a first solution;

[0047] performing second mixing of the first solution, p-toluenesulfonic acid, salicylic acid and isoamyl alcohol to obtain a second solution;

[0048] The second solution, sodium lauryl sulfate, cationic fluorocarbon surfactant and water are mixed for the third time to obtain the temperature-resistant and salt-resistant foaming agent.

[0049] In the present invention,...

Embodiment 1

[0071] Mix 10% maleic acid and 11% dodecyl alcohol, and mix for 4 hours at a temperature of 52°C and a rotation speed of 175r / min to obtain the first solution;

[0072] Dissolve p-toluenesulfonic acid in deionized water to obtain a p-toluenesulfonic acid aqueous solution with a mass percent concentration of 50%; add the p-toluenesulfonic acid aqueous solution dropwise at 80°C to Temperature is in the first solution of 80 ℃ (the percentage composition of p-toluenesulfonic acid in the raw material gross mass is 22%), mix 4.5h under the condition of 175r / min, obtain the 4th solution; The 4th The solution and 3% salicylic acid were mixed for 3 hours at 80°C and 175r / min to obtain the fifth solution; the fifth solution and 26% isoamyl alcohol were mixed for 30min at 80°C and 175r / min, obtain the second solution;

[0073] Mix the second solution, 1% sodium lauryl sulfate and 2.5% sodium vinyl sulfonate at 50°C and 175r / min for 1.5h to obtain the seventh solution; mix the seventh so...

Embodiment 2

[0075] Mix 15% maleic acid and 13% dodecanol, and mix for 4.5 hours at a temperature of 52°C and a rotation speed of 178r / min to obtain the first solution;

[0076] Dissolve p-toluenesulfonic acid in deionized water to obtain a p-toluenesulfonic acid aqueous solution with a mass percent concentration of 58%; add the p-toluenesulfonic acid aqueous solution dropwise to a temperature of 80°C at a rate of 30 drops / min. In a solution (the percentage composition of p-toluenesulfonic acid in the raw material gross mass is 18%), mix 4h under the condition of 178r / min, obtain the 4th solution; The 4th solution and 5% salicylic acid Mix at 80°C and 178r / min for 2h to obtain a fifth solution; mix the fifth solution with 25% isoamyl alcohol at 80°C and 178r / min for 30min to obtain a second solution;

[0077] Mix the second solution, 0.5% sodium lauryl sulfate and 3% sodium vinylsulfonate at 50°C and 178r / min for 0.5h to obtain the seventh solution; mix the seventh solution with the remain...

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Abstract

The invention belongs to the technical field of foaming agents, and particularly relates to a temperature-resistant and salt-resistant foaming agent and a preparation method and application thereof. The temperature-resistant and salt-resistant foaming agent provided by the invention is prepared from the following preparation raw materials in percentage by mass: 10 to 15 percent of dodecanol, 8 to12 percent of maleic acid, 3 to 6 percent of salicylic acid, 25 to 33 percent of isoamyl alcohol, 18 to 22 percent of p-toluenesulfonic acid, 0.5 to 3 percent of lauryl sodium sulfate, 0.5 to 3 percent of cationic fluorocarbon surfactant and the balance of water. The performance of the foaming agent is tested by adopting simulated formation water, the temperature of the simulated formation water is 180 DEG C, the mineralization degree is 150000 g / L, when the mass concentration of the foaming agent in the simulated formation water is 0.3%, the surface tension of bubbles is 20.9-21.8 mN / m, the height of the bubbles is 200-235 mm when the bubbles are foamed for 3 min, and the liquid carrying capacity of the bubbles is 86-90 mL.

Description

technical field [0001] The invention belongs to the technical field of foaming agents, and in particular relates to a heat-resistant and salt-resistant foaming agent and its preparation method and application. Background technique [0002] During the development process of natural gas wells, due to edge and bottom water propulsion, water injection drive and fracturing operations, water continuously accumulates in the wellbore, resulting in a decrease in gas production or even being crushed to death. Foam drainage is a common technique used in oil and gas fields at home and abroad to remove effluent from natural gas wells. The foam drainage method uses the action of natural gas and a foaming agent dissolved in the well fluid to form a continuously rising foam column, and the liquid and solid particles mixed in it are discharged from the well. Bring it out. The geological composition of different regions is different, and the formation water of different geology has different...

Claims

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Application Information

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IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 李荣聂俊博邓焱伟黄保军贾剑平黄连华胡志轩高则彬丁伟杰周毓江
Owner KARAMAY SANDA NEW TECH