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A salt-resistant and temperature-resistant foaming agent

A foaming agent, temperature-resistant technology, applied in drilling compositions, chemical instruments and methods, etc., can solve problems such as poor foaming performance

Inactive Publication Date: 2017-01-04
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a salt-resistant and temperature-resistant foaming agent, which can be applied to water with a salinity of 10×10 4 mg / L~25×10 4 mg / L and temperature up to 120°C to overcome the disadvantages of salting-out or poor foaming performance of commonly used foaming agents or heat-resistant and salt-resistant foaming agents at high salinity

Method used

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  • A salt-resistant and temperature-resistant foaming agent
  • A salt-resistant and temperature-resistant foaming agent
  • A salt-resistant and temperature-resistant foaming agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 1. Preparation of SMF-1

[0014] use C 14-16 Sodium α-olefin sulfonate, cocamidopropyl betaine and cetyl glucoside construct a foaming agent suitable for salt and temperature resistance. Choose C 14-16 α - The effective concentration of sodium olefin sulfonate is 48%, the effective concentration of cocamidopropyl betaine is 60% and the effective concentration of cetyl glucoside is 90%, according to the molar ratio of 1:1:0.02 , weighed 5.69g C 14-16 α -Sodium olefin sulfonate, 8.00g cocamidopropyl betaine and 0.12g cetyl glucoside were added successively in a three-necked flask filled with 60mL distilled water, and stirred vigorously for 2.5 hours at a temperature of 60°C, and then in Dehydrate under vacuum conditions to obtain a salt-resistant and temperature-resistant foaming agent (SMF-1).

[0015] 2. Investigation of the salt tolerance of SMF-1

[0016] Prepared according to API standard 10×10 4 mg / L, 15×10 4 mg / L, 20×10 4 mg / L and 25×10 4 mg / L of brine (...

Embodiment 2

[0028] 1. Preparation of SMF-2

[0029] use C 14-16 Sodium α-olefin sulfonate, cocamidopropyl betaine and cetyl glucoside construct a foaming agent suitable for salt and temperature resistance. Choose C 14-16 α - The effective concentration of sodium olefin sulfonate is 48%, the effective concentration of cocamidopropyl betaine is 60% and the effective concentration of cetyl glucoside is 90%. According to the molar ratio of 1:1:0.24, weigh 5.69g C 14-16 α -Sodium olefin sulfonate, 8.00g cocamidopropyl betaine and 1.44g cetyl glucoside were added successively in a three-necked flask filled with 60mL distilled water, and stirred vigorously for 2.5 hours at a temperature of 70°C, and then in Dehydration under vacuum conditions to obtain a supramolecular foaming agent (SMF-2) resistant to salt and temperature.

[0030] 2. Investigation of the salt tolerance of SMF-2

[0031] Prepared according to API standard 10×10 4 mg / L, 15×10 4 mg / L, 20×10 4 mg / L and 25×10 4 mg / L of ...

Embodiment 3

[0041] 1. Preparation of SMF-3

[0042] use C 14-16 Sodium α-olefin sulfonate, cocamidopropyl betaine, cetyl betaine and stearyl glucoside build a foaming agent resistant to salt and temperature. Choose C 14-16 α - The effective concentration of sodium olefin sulfonate is 48%, the effective concentration of cocamidopropyl betaine is 60%, the effective concentration of cetyl betaine is 68% and the effective concentration of stearyl glucoside is 86% %. According to the molar ratio of 1:0.5:0.5:0.02, weigh 5.69g C 14-16 Sodium α-olefin sulfonate, 4.00g cocamidopropyl betaine, 4.96g cetyl betaine and 0.13g octadecyl glucoside were successively added to a three-necked flask filled with 60mL distilled water, and the Stir vigorously at high temperature for 2.5 hours, and then dehydrate under vacuum to obtain a salt-resistant and temperature-resistant blowing agent (SMF-3).

[0043] 2. Investigation on the foaming performance of SMF-3 at room temperature

[0044] Use 15×10 4 m...

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Abstract

The invention provides a salt-resistant and temperature-resistant foaming agent, which is composed of long-chain sodium α-olefin sulfonate, betaine-type surfactant and hydrophilic linking agent in a molar ratio of 1:1:(0.01-0.24). Proportions are mixed, wherein, the long-chain α-olefin sulfonate is sodium C14-16α-olefin sulfonate, C14-18α-olefin sodium sulfonate, C16-18α-olefin sodium sulfonate or C20-24α-olefin sulfonic acid Sodium; betaine type surfactant is cocamidopropyl betaine or cetyl betaine or their mixture; hydrophilic linking agent is cetyl glucoside or octadecyl glucoside or their mixture , This foaming agent is suitable for foam flooding foaming agent or foam plugging agent or foam drilling fluid foaming agent or drainage gas production under the condition of salinity below 25×104mg / L and temperature up to 120℃ foam remover.

Description

technical field [0001] The invention relates to an oilfield chemical agent, in particular to a foaming agent suitable for salt resistance and temperature resistance. Background technique [0002] Foam belongs to the multiphase dispersion system, which is a non-Newtonian fluid with low density, good viscosity and compressibility. Foam systems are widely used in oilfields, such as foam drilling, foam flooding, foam drainage and gas recovery, foam profile control and water plugging, foam fracturing, foam acid acidification, foam sand washing, foam well killing, foam cement cementing, etc. . Foam is composed of water, blowing agent and gas. Foaming agents used include sulfonate-type anionic surfactants, betaine-type amphoteric surfactants, non-ionic surfactants, and non-ionic-anionic surfactants. Sulfonate-type anionic surfactants include petroleum sulfonates, alkyl sulfonates, alkylbenzene sulfonates, heavy alkylbenzene sulfonates and olefin sulfonates. Betaine-type amphote...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C09K8/38C09K8/518C09K8/584
Inventor 刘德新肖桂龙钟珣史晓斐
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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