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Anti-swelling clay stabilizer and preparation method thereof

A clay stabilizer and anti-swelling technology, which is applied in the field of anti-swelling clay stabilizer and its preparation, can solve problems such as poor anti-scourability, water well casing change, and large formation damage, and achieve high anti-swelling efficiency, strong binding force, Ease of promoting the effect of the application

Inactive Publication Date: 2014-10-29
郑州德融科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the existing clay stabilizers have a certain anti-swelling and stabilizing effect, they have poor anti-scourability, cause great damage to the formation, and easily cause deformation due to water well casings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] An anti-swelling clay stabilizer, comprising the following components in parts by weight: 1 part of gellan gum, 2 parts of potassium fulvic acid, 5 parts of 1-butyl-3-methylimidazole tetrafluoroborate, 10 parts of Gemini surfactant, 5 parts of polyethylene glycol, 0.5 part of isopropanol, 18 parts of water;

[0019] The structural formula of the Gemini surfactant is shown in formula (I),

[0020] Formula (Ⅰ).

[0021] The preparation method of above-mentioned anti-swelling clay stabilizer comprises the steps:

[0022] Step (1), add polyethylene glycol into water and mix well, then add to the vacuum reactor and then add gellan gum, 1-butyl-3-methylimidazolium tetrafluoroborate and Gemini surfactant to it , at a temperature of 65°C and a pressure of 0.8 MPa, react for 1 hour and drop to room temperature;

[0023] Step (2), continue to add potassium fulvic acid and isopropanol to the reaction kettle, continue to stir until the mixture is uniform, and then obtain the a...

Embodiment 2

[0026] An anti-swelling clay stabilizer, comprising the following components in parts by weight: 3 parts of gellan gum, 5 parts of potassium fulvic acid, 10 parts of 1-butyl-3-methylimidazole tetrafluoroborate, 15 parts of Gemini surfactant, 10 parts of polyethylene glycol, 3 parts of isopropanol, 25 parts of water;

[0027] The structural formula of the Gemini surfactant is shown in formula (I),

[0028] Formula (Ⅰ).

[0029] The preparation method of above-mentioned anti-swelling clay stabilizer comprises the steps:

[0030] Step (1), add polyethylene glycol into water and mix well, then add to the vacuum reactor and then add gellan gum, 1-butyl-3-methylimidazolium tetrafluoroborate and Gemini surfactant to it , at a temperature of 75°C and a pressure of 0.8 MPa, react for 2 hours and drop to room temperature;

[0031] Step (2), continue to add potassium fulvic acid and isopropanol to the reaction kettle, continue to stir until the mixture is uniform, and then obtain th...

Embodiment 3

[0034] An anti-swelling clay stabilizer, comprising the following components in parts by weight: 2 parts of gellan gum, 3 parts of potassium fulvic acid, 8 parts of 1-butyl-3-methylimidazole tetrafluoroborate, 12 parts of Gemini surfactants, 7 parts of polyethylene glycol, 1.5 parts of isopropanol, and 22 parts of water; the structural formula of the Gemini surfactants is shown in formula (I),

[0035] Formula (Ⅰ).

[0036] The preparation method of above-mentioned anti-swelling clay stabilizer comprises the steps:

[0037] Step (1), add polyethylene glycol into water and mix well, then add to the vacuum reactor and then add gellan gum, 1-butyl-3-methylimidazolium tetrafluoroborate and Gemini surfactant to it , at a temperature of 72°C and a pressure of 0.8MPa, react for 1.6h and drop to room temperature;

[0038] Step (2), continue to add potassium fulvic acid and isopropanol to the reaction kettle, continue to stir until the mixture is uniform, and then obtain the anti-s...

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PUM

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Abstract

The invention relates to an anti-swelling clay stabilizer and a preparation method thereof and belongs to the technical field of oil exploitation. The anti-swelling clay stabilizer is prepared from the following components in parts by weight: 1-3 parts of gellan gum, 2-5 parts of potassium fulvate, 5-10 parts of 1-butyl-3-methyl imidazole tetraborofluoride, 10-15 parts of a Gemini surfactant, 5-10 parts of polyethylene glycol, 0.5-3 parts of isopropanol and 18-25 parts of water. The preparation method of the anti-swelling clay stabilizer provided by the invention is simple and reliable and the anti-swelling clay stabilizer prepared has an extremely strong bonding force with clay minerals and is good in compatibility, high in anti-swelling efficiency and easy to popularize and apply.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to an anti-swelling clay stabilizer and a preparation method thereof. Background technique [0002] In the process of oilfield development, from drilling, well completion, acidizing, fracturing to water injection development, each process will have foreign fluids in contact with formation clay minerals, which contain a certain amount of clay minerals such as kaolinite, montmorillonite, illite and green Clay minerals such as mudstone, these clay minerals are mostly composed of silicon-oxygen tetrahedrons and aluminum-oxygen octahedrons in a layered structure. When clay minerals are in contact with water, water can enter between the crystal layers of clay minerals, and the exchangeable cations on the surface of the crystal layers dissociate and diffuse in the water to form a diffuse electric double layer, which makes the surface charged, and the crystal laye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/90C09K8/035
CPCC09K8/035C09K8/602C09K2208/12
Inventor 李瑞国
Owner 郑州德融科技有限公司
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