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Acetic acid mixed liquid for preparing retarded acidizing fluid and retarded acidizing fluid and preparation method thereof

A technology for mixing liquid and acidizing liquid, which is applied in chemical instruments and methods, drilling compositions, etc., to achieve the effects of simple operation, avoiding safety risks and convenient construction

Inactive Publication Date: 2018-03-16
SINOPEC SSC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a kind of acetic acid mixed solution for preparing retarded acidification solution, to solve the problem that existing glacial acetic acid needs to be heated and melted to prepare retarded acidification solution when the ambient temperature is low

Method used

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  • Acetic acid mixed liquid for preparing retarded acidizing fluid and retarded acidizing fluid and preparation method thereof

Examples

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Effect test

Embodiment 1

[0038] The acetic acid mixed solution used to prepare the slow acidification solution in this embodiment is prepared by mixing glacial acetic acid and SCA chelating agent, and the mass ratio of glacial acetic acid and SCA chelating agent is 4:1.

[0039] The freezing point of the acetic acid mixture in this embodiment is below -16°C, and the acetic acid mixture can be prepared when the ambient temperature is higher than 16.6°C; It is easy to use by adding slow acidification solution based on its fluidity.

[0040] The retarded acidification solution of this embodiment is composed of the following components in mass percentage: HCl 10%, the above-mentioned acetic acid mixed solution 3.75%, SCA chelating agent 1.25%, XT-5 low penetration enhancer 0.5%, TH-05 buffer 1.5% etchant, 2% ammonium chloride, and the balance is water.

[0041] The preparation method of the retarded acidification solution of the present embodiment comprises the following steps:

[0042] 1) get the glaci...

Embodiment 2

[0046] The acetic acid mixed solution used to prepare the slow acidification solution in this embodiment is prepared by mixing glacial acetic acid and SCA chelating agent, and the mass ratio of glacial acetic acid and SCA chelating agent is 4:1.

[0047] The freezing point of the acetic acid mixture in this embodiment is below -16°C, and the acetic acid mixture can be prepared when the ambient temperature is higher than 16.6°C; It is easy to use by adding slow acidification solution based on its fluidity.

[0048] The retarded acidification solution of this embodiment is composed of the following components in mass percentage: HCl 10%, the above-mentioned acetic acid mixed solution 3.75%, SCA chelating agent 1.25%, XT-5 low penetration enhancer 0.5%, TH-05 buffer etchant 1.5%, TH-11 mutual solvent 1%, ammonium chloride 2%, and the balance is water. The preparation method of this slow acidification solution is the same as in Example 1. The retarded acidification solution is u...

Embodiment 3

[0050] The acetic acid mixed solution used to prepare the slow acidification solution in this embodiment is prepared by mixing glacial acetic acid and SCA chelating agent, and the mass ratio of glacial acetic acid and SCA chelating agent is 4:1.

[0051] The freezing point of the acetic acid mixture in this embodiment is below -16°C, and the acetic acid mixture can be prepared when the ambient temperature is higher than 16.6°C; It is easy to use by adding slow acidification solution based on its fluidity.

[0052] The retarded acidification solution of this embodiment is composed of the following components in mass percentage: HCl 10%, the above-mentioned acetic acid mixed solution 3.75%, SCA chelating agent 1.25%, XT-5 low penetration enhancer 0.5%, TH-05 buffer 2.0% etchant, 2% ammonium chloride, and the balance is water. The preparation method of this slow acidification solution is the same as in Example 1. The retarded acidification solution is used as a front fluid in t...

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Abstract

The invention discloses acetic acid mixed liquid for preparing retarded acidizing fluid and retarded acidizing fluid and a preparation method thereof. The acetic acid mixed liquid is made by mixing ofglacial acetic acid and an SCA chelating agent in a mass ratio of 4:1. The acetic acid mixed liquid has advantages that by adding of the SCA chelating agent into glacial acetic acid, a freezing pointof acetic acid can be lowered; the freezing point of the obtained acetic acid mixed liquid is lowered to -16 DEG C or below; the acetic acid mixed liquid can be prepared when an environment temperature is higher than 16.6 DEG C and keeps a liquid state all through the year in most regions, and the acetic acid mixed liquid is added for preparing the retarded acidizing fluid due to liquidity in use, so that convenience in use is achieved; in addition, introduction of other impurities into an acidizing fluid system is avoided, so that contamination of the retarded acidizing fluid is avoided; inonsite construction, safety risks caused by onsite heating for melting glacial acetic acid are avoided, and production cost reduction and suitableness for popularization and application are realized.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and specifically relates to an acetic acid mixed solution used for preparing a slow acidification solution, and also relates to a slow acidification solution prepared by using the acetic acid mixed solution and a preparation method thereof. Background technique [0002] Acetic acid is a colorless liquid with a strong pungent sour taste at room temperature; its molecular formula: C 2 h 4 o 2 , molecular weight: 60.05. Acetic acid has a melting point of 16.6°C (289.6K), a boiling point of 117.9°C (391.2K), a relative density of 1.05, a flash point of 39°C, and an explosion limit of 4% to 17% (by volume). It forms hydrogen bonds with water and can be miscible with water in any ratio. . Pure acetic acid will freeze into ice crystals when it is lower than the melting point, so anhydrous acetic acid is also called glacial acetic acid. For example, the climate in Nanyang, Henan Provi...

Claims

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Application Information

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IPC IPC(8): C09K8/74
CPCC09K8/74
Inventor 黄朝阳邱杰范富海孙香梅屈勇刘林学曾江李峰景长江刘文轩陈国标张红伟王晓铮李燕田奎崔岩龙
Owner SINOPEC SSC
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