Salt-tolerance temperature-resistance 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: 2014-10-08
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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  • Salt-tolerance temperature-resistance foaming agent
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  • Salt-tolerance temperature-resistance 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-tolerance temperature-resistance foaming agent. The salt-tolerance and temperature-resistance foaming agent is prepared from long-chain alpha-olefin sulfonates, a betaine type surfactant and a hydrophilic coupling agent according to the molar ratio of 1: 1: (0.01-0.24), wherein the long-chain alpha-olefin sulfonates is C14-16 alpha-olefin sulfonates, C14-18 alpha-olefin sulfonates, C16-18 alpha-olefin sulfonates or C20-24 alpha-olefin sulfonates, the betaine type surfactant is coconut fatty amido propyl betaine, hexadecyl betaine or a mixture of the coconut fatty amido propyl betaine and the hexadecyl betaine, and the hydrophilic coupling agent is hexadecyl glucoside, octadecyl glucoside or a mixture of the hexadecyl glucoside and the octadecyl glucoside. The foaming agent is suitable for a foam flooding foaming agent, a foam plugging agent, a foam drilling fluid foaming agent or a foam scrubbing agent used for drainage gas recovery under the oil reservoir conditions that the salinity is lower than 25*10<4>mg / L, and the temperature reaches up to 120 DEG C.

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 Applications(China)
IPC IPC(8): C09K8/035C09K8/38C09K8/518C09K8/584
CPCC09K8/035C09K8/38C09K8/518C09K8/584
Inventor 刘德新肖桂龙钟珣史晓斐
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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