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Washable shrinkage swelling clay stabilizer and preparation method thereof

A clay stabilizer and water-resistant technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as unsatisfactory effects, difficulty in achieving multiple effects, lack of clay stabilizers, etc., and achieve good performance and good shrinkage The effect of swelling performance and good washing resistance

Inactive Publication Date: 2017-11-07
KARAMAY ZHENGCHENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a lack of research on anti-swelling technologies that are resistant to water washing and shrinkage, and there is a lack of clay stabilizers that have both good anti-swelling effects and shrinkage effects and are washable. It is difficult to achieve multiple effects by using one agent alone. Compounding work is more difficult and the effect is not ideal

Method used

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  • Washable shrinkage swelling clay stabilizer and preparation method thereof
  • Washable shrinkage swelling clay stabilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1, the water-resistant shrinkage clay stabilizer is obtained by the following preparation method: the first step, first mix the dodecyl / tetradecyl tertiary amine with a hydrochloric acid solution with a concentration of 31% to 38% in a molar ratio of 1:1.5 Form the quaternary ammonium salt mother liquor, then add 0.07% to 0.12% of the oxidant I in the quaternary ammonium salt mother liquor to the quaternary ammonium salt mother liquor, react at a temperature of 15°C to 20°C for 30min to 35min to obtain the mother liquor I;

[0022] In the second step, mix hexamethylenetetramine and hydrochloric acid solution with a concentration of 36% to 38% at a molar ratio of 1:1.5 to form hexamethylenetetramine hydrochloride mother liquor, and then add hexamethylenetetramine hydrochloride mother liquor Add an aluminum ion cross-linking agent, wherein the aluminum ion in the aluminum ion cross-linking agent accounts for 0.1% to 1% of the mother liquor of hexamethylenetetramine...

Embodiment 2

[0025] Example 2, the water-resistant shrinkage clay stabilizer is obtained by the following preparation method: the first step, first mix the dodecyl / tetradecyl tertiary amine with a hydrochloric acid solution with a concentration of 31% or 38% in a molar ratio of 1:1.5 Form a quaternary ammonium salt mother liquor, then add 0.07% or 0.12% oxidant I to the quaternary ammonium salt mother liquor, react at a temperature of 15°C or 20°C for 30min or 35min to obtain mother liquor I;

[0026] In the second step, mix hexamethylenetetramine and hydrochloric acid solution with a concentration of 36% or 38% at a molar ratio of 1:1.5 to form hexamethylenetetramine hydrochloride mother liquor, and then add hexamethylenetetramine hydrochloride mother liquor Add an aluminum ion cross-linking agent, wherein the aluminum ion in the aluminum ion cross-linking agent accounts for 0.1% or 1% of the mother liquor of hexamethylenetetramine hydrochloride, and then choose a gradient temperature rise...

Embodiment 3

[0028] Example 3, as an optimization of the above examples, the oxidant I is ammonium persulfate; or / and, the oxidant II is ammonium persulfate; or / and, the polymer is polyacrylamide with a molecular weight of 8 million to 12 million; or / and , the solvent is deionized water or ethanol solution. The ethanol solution is an aqueous ethanol solution obtained by mixing absolute ethanol and deionized water in any ratio;

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Abstract

The invention relates to the technical field of shrinkage swelling agents, in particular to a washable shrinkage swelling clay stabilizer and a preparation method thereof. The method comprises the following steps: 1, firstly, synthesizing quaternary ammonium salt mother liquor by using 12 / 14 tertiary amine and hydrochloric acid, and adding an oxidizing agent I into the quaternary ammonium salt mother liquor to obtain mother liquor I; 2, synthesizing a hexamethylenetetramine hydrochloric acid mother liquor by using hexamethylenetetramine and hydrochloric acid, and then adding an aluminum ion crosslinking agent into the hexamethylenetetramine hydrochloric acid mother liquor to obtain mother liquor II; 3, selecting the mother liquor I, the mother liquor II, polyquaternium, an oxidizing agent II, a polymer, zirconium oxychloride, zinc acetate, a solvent and a surfactant for mixing, and then adjusting the pH value by using ethanol amine so as to obtain the washable shrinkage swelling clay stabilizer. According to the preparation method, the mother liquors with certain concentrations are synthesized according to the need of compounding, and the washable shrinkage swelling clay stabilizer is obtained by compounding the mother liquors; the prepared washable shrinkage swelling clay stabilizer not only has better shrinkage swelling performance, but also has better wash resistance, is simple in preparation process and easy to implement and has good performance.

Description

technical field [0001] The invention relates to the technical field of swelling agents, and relates to a water-resistant shrinkage swelling clay stabilizer and a preparation method thereof. Background technique [0002] At present, there are many kinds of clay stabilizers used in oilfields, and the static anti-swelling effect can all meet the technical indicators, and the effect of 0.5% aqueous solution (solid ≥ 80.0%, liquid ≥ 70.0%) is uneven. There is a lack of research on anti-swelling technologies that are resistant to water washing and shrinkage, and there is a lack of clay stabilizers that have both good anti-swelling effects and shrinkage effects and are washable. It is difficult to achieve multiple effects by using one agent alone. Compounding work is more difficult, and the effect is not ideal. Contents of the invention [0003] The invention provides a water-resistant shrinkage swelling clay stabilizer and a preparation method thereof, which overcomes the above...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03
CPCC09K8/03C09K2208/12
Inventor 曹金园
Owner KARAMAY ZHENGCHENG