Fracture acidizing cleanup additive of fluorine-containing carbon chain Gemini surfactant and preparation method thereof

A surfactant, fracturing and acidizing technology, applied in the field of petroleum exploration, can solve problems such as the effect of reducing the surface tension of acid liquid, and achieve the effect of increasing permeability and improving efficiency

Active Publication Date: 2012-07-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effect of reducing the surface tension of acid is not very satisfactory

Method used

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  • Fracture acidizing cleanup additive of fluorine-containing carbon chain Gemini surfactant and preparation method thereof
  • Fracture acidizing cleanup additive of fluorine-containing carbon chain Gemini surfactant and preparation method thereof
  • Fracture acidizing cleanup additive of fluorine-containing carbon chain Gemini surfactant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Heat 699Kg of water to 40°C, and then add 280Kg of isopropanol under stirring. Continue to add 20Kg of fatty alcohol polyoxyethylene ether (AEO-7), and finally add 1Kg of fluorine-containing carbon chain Gemini surfactant G1. Stir for another 10 minutes and cool to room temperature to obtain the fracturing acidizing and drainage aid.

[0036] The weight percent of each component is:

[0037] Fatty alcohol polyoxyethylene ether (AEO-7) 2%

[0038] Fluorine-containing carbon chain Gemini surfactant G1 0.1%

[0039] Isopropanol 28%

[0040] Water 69.9%

Embodiment 2

[0042] Heat 615Kg of water to 40°C, and then add 80Kg of ethylene glycol under stirring. Continue to add 220Kg of alkylphenol polyoxyethylene polymethyloxyethylene ether (PG26-2) and 82Kg of dodecylbenzyl dimethyl ammonium chloride, and finally add 3Kg of fluorine-containing carbon chain Gemini surfactant G1. Stir for another 10 minutes and cool to room temperature to obtain the fracturing acidizing and drainage aid.

[0043] The weight percentages of each component are:

[0044] Dodecylbenzyldimethylammonium chloride 8.2%

[0045] Alkylphenol polyoxyethylene polymethyloxyethylene ether (PG26-2) 22%

[0046] Fluorine-containing carbon chain Gemini surfactant G1 0.3%

[0047] Ethylene glycol 8%

[0048] Water 61.5%

Embodiment 3

[0050] Heat 549Kg of water to 40°C, and then add 250Kg of ethylene glycol under stirring. Continue to add 200Kg of fatty alcohol polyoxyethylene ether (AEO-9), and finally add 1Kg of fluorine-containing carbon chain Gemini surfactant G1. Stir for another 10 minutes and cool to room temperature to obtain the fracturing acidizing and drainage aid.

[0051] The weight percentages of each component are:

[0052] Fatty alcohol polyoxyethylene ether (AEO-9) 20%

[0053] Fluorine-containing carbon chain Gemini surfactant G1 0.1%

[0054] Ethylene glycol 25%

[0055] Water 54.9%

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Abstract

The invention discloses a fracture acidizing cleanup additive and a preparation method thereof. The cleanup additive consists of the following components in percentage by weight: (1) 0.01-0.5 percent of fluorine-containing carbon chain Gemini surfactant G1 or G2; (2) 1-35 percent of nonionic surfactant; (3) 5-30 percent of small molecular alcohol; (4) 0-10 percent of alkyl benzyl dimethyl ammonium chloride or alkyl trimethyl ammonium chloride; and (5) the balance of water. The preparation method comprises the following steps of: adding/or not adding the alkyl benzyl dimethyl ammonium chloride or alkyl trimethyl ammonium chloride for the nonionic surfactant; dissolving in mixed solvent of water and the small molecular alcohol; stirring for full dissolving; then adding fluorine-containing carbon chain surfactant; continuously stirring; and cooling to room temperature to prepare the cleanup additive. Through the fracture acidizing cleanup additive, the surface tension can be obviously reduced, water contact angle is increased, capillary force is reduced, and the flow-back efficiency of injected fluid is increased.

Description

technical field [0001] The invention relates to the field of petroleum exploration, and furthermore, relates to a fracturing acidizing and drainage aid for fluorine-containing carbon chain Gemini surfactants and a preparation method thereof. Background technique [0002] In order to improve single well production and oil field recovery, the method of fracturing and acidizing is usually used to reform the reservoir to increase the seepage capacity of the formation. Working fluid is one of the key factors in fracturing and acidizing stimulation technology. The drainage aid in the working fluid components plays a decisive factor in the flowback of the fluid. The speed and thoroughness of the flowback of the injected fluid will affect the effect of fracturing and acidizing stimulation operations. With the expansion of my country's exploration and development fields, the temperature of the formation is getting higher and higher, some formations reach 200 ° C, and the permeabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/74
Inventor 张汝生
Owner CHINA PETROLEUM & CHEM CORP
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