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High-temperature foam stabilizer and foaming liquid of giant surfactants, preparation method and application thereof

A surfactant and foaming liquid technology, applied in the field of high-temperature foam stabilizers, can solve the problem of decreased viscosity-increasing performance of surface-active hydrophilic polymers, oil reservoir damage, reduced foaming liquid foaming performance and foam stability Improve the expansion modulus, improve the oil recovery rate, and enhance the foam stability

Active Publication Date: 2021-07-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hydrophilic polymer in the foaming liquid will absorb a large amount of small molecule surfactants, which significantly reduces the foaming performance and foam stability of the foaming liquid, and the residual high viscoelastic polymer will cause damage to the reservoir , and at medium and high temperatures, the surface activity of small molecule surfactants and the viscosity-increasing performance of hydrophilic polymers are greatly reduced

Method used

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  • High-temperature foam stabilizer and foaming liquid of giant surfactants, preparation method and application thereof
  • High-temperature foam stabilizer and foaming liquid of giant surfactants, preparation method and application thereof
  • High-temperature foam stabilizer and foaming liquid of giant surfactants, preparation method and application thereof

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preparation example Construction

[0057] Another aspect of the present invention provides a kind of preparation method of described high-temperature foam stabilizer, wherein said method comprises the following steps:

[0058] (1) In the presence of an oxime connection reaction catalyst and a thiol-ene addition reaction photoinitiator, under ultraviolet light irradiation, the aldehyde group vinyl oligomeric silsesquike siloxane of formula (VII), formula (IV ) of aminooxypolystyrene and 2-mercaptoacetic acid react in a solvent;

[0059] (2) Cool the reaction solution in step (1) in cooling liquid until precipitation occurs.

[0060] In a preferred embodiment of the inventive method, the mass ratio of the aldehyde group vinyl oligomeric silsesquicage siloxane of formula (VII), the aminooxypolystyrene of formula (IV) and 2-mercaptoacetic acid is 2 -12:18-32:5-13, preferably 4-10:20-30:7-11, more preferably 5-8:23-28:7.5-10;

[0061] In a preferred embodiment of the method of the present invention, the catalyst f...

Embodiment 1

[0140] The high-temperature foam stabilizer (APOSS-PS of formula (I) of giant surfactant class of the present invention 50-80 , n is 50-80. ) for infrared spectroscopic analysis, see figure 1 .

[0141] The results of infrared spectroscopy were as figure 1 As shown, 3338.63cm -1 The place is the stretching vibration peak of hydroxyl O-H in the carboxyl group; 3066.09cm -1 It is the C-H stretching vibration peak of the aromatic ring; 2805.22cm -1 For the structural unit "-O-CH 2 "C-H stretching vibration peak; 1938.50cm -1 and 1905.22cm -1 It is the C-H out-of-plane bending vibration peak of aromatic compounds; 1720.22cm -1 The place is the C=O stretching vibration peak of the carbonyl group in the carboxyl group; 1641.74cm -1 and 1616.86cm -1 It is the C=C stretching vibration peak of the aromatic ring skeleton; 1331.30cm -1 and 1278.45cm -1 It is the carboxyl C-O stretching vibration peak; 1126.65cm -1 It is the Si-O-Si stretching vibration peak; 972.82cm-1 is th...

Embodiment 2

[0143] The nuclear magnetic resonance 1H-NMR analysis of high temperature foam stabilizer of the present invention, see figure 2 .

[0144] The results of H NMR spectroscopy were as follows: figure 2 Shown, δ=11.963ppm place is the proton signal in the carboxyl group, and the triplet peak that occurs at δ=8.16-8.18ppm place is the absorption peak of No. (1) proton in structural unit 1; Peak is the absorption peak of No. (2) proton in structural unit 1; The multiple peak that occurs at δ=5.899-6.124ppm place is the proton absorption peak of aromatic ring in polystyrene structural unit; δ=5.174ppm place is in structural unit 2 (3) the absorption peak of No. proton; The triplet peak that occurs at δ=3.101~3.121ppm place is structural unit " RS-CH 2 -CH 2 The proton absorption peak on the carbon nucleus linked to the sulfur atom in -Si-"; the triplet peak that appears at δ=2.887-2.906ppm is the structural unit "HOOC-CH 2 The proton absorption peak on the carbon nucleus conne...

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Abstract

The present invention relates to a kind of high-temperature foam stabilizer of giant surfactant class, and it has the structural formula of formula (I): wherein, R represents group-CH 2 -CH 2 ‑S‑CH 2 -COOH; n represents an integer of 20-100, preferably 50-80. The present invention also relates to the preparation method of the high-temperature foam stabilizer, the foaming liquid containing the high-temperature foam stabilizer, and the preparation and application of the foaming liquid.

Description

technical field [0001] The invention relates to a high-temperature foam stabilizer of giant surfactants, a foaming liquid and a preparation method and application thereof. Background technique [0002] Steam huff and puff is an important technology in oilfield thermal recovery, and it is the main method of heavy oil reservoir recovery. However, with the increase of throughput rounds, the water cut in oil wells has increased significantly due to the intrusion of edge and bottom water and the ineffective channeling of steam. The problem of high water content has become the main contradiction restricting the effect of thermal recovery. And with the increase of oil layer permeability and the enhancement of reservoir heterogeneity, the injection steam has the problem of rushing along the high permeability layer and the dominant channel, which affects the development effect of steam injection in heavy oil oil fields. Therefore, profile control and plugging technology has become ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/442C09K8/592
CPCC08G77/442C09K8/592
Inventor 于田田何绍群张雷谢志勤贺文媛林吉生郭省学刘岩梁伟宋丹
Owner CHINA PETROLEUM & CHEM CORP
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