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A kind of high-temperature acidification diverting agent and preparation method thereof

An acid-steering, high-temperature technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of poor temperature resistance and viscosity-increasing performance, and can increase the length of acid etching cracks, increase viscosity, and improve temperature resistance. performance effect

Active Publication Date: 2022-03-18
滨州市广友化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of poor temperature resistance and thickening performance in the prior art, the present invention provides a high-temperature acidification diverting agent to improve its temperature resistance and thickening performance. The present invention also provides a preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A high-temperature acidification diverting agent, comprising the following components:

[0023] Erucamide propyl betaine 20g, dialkylimidazole ionic liquid surfactant 20g, ethylene glycol 3g, deionized water 57g.

[0024] The preparation method of described high-temperature acidification diverting agent, comprises the steps:

[0025] (1) Add ethylene glycol to deionized water;

[0026] (2) adding the dialkylimidazole ionic liquid surfactant to the solution obtained in step (1);

[0027] (3) Add erucamidopropyl betaine to the solution obtained in step (2), and continue stirring until fully dissolved to obtain a high-temperature acidification diverting agent.

Embodiment 2

[0029] A high-temperature acidification diverting agent, comprising the following components:

[0030] 40 g of erucamidopropyl betaine, 10 g of 1-butyl-3-methylimidazolium n-alkylsulfonate, 4 g of propynyl alcohol, and 46 g of deionized water.

[0031] The preparation method of described high-temperature acidification diverting agent, comprises the steps:

[0032] (1) Add propynyl alcohol to deionized water;

[0033] (2) Add 1-butyl-3-methylimidazolium n-alkylsulfonate to the solution obtained in step (1);

[0034] (3) Add erucamidopropyl betaine to the solution obtained in step (2), and continue stirring until fully dissolved to obtain a high-temperature acidification diverting agent.

Embodiment 3

[0036] A high-temperature acidification diverting agent, comprising the following components:

[0037] Erucamidopropyl betaine 30g, alkylimidazole-pyridine ionic liquid surfactant 30g, ethanol 5g, deionized water 35g.

[0038] The preparation method of described high-temperature acidification diverting agent, comprises the steps:

[0039] (1) Add ethanol to deionized water;

[0040] (2) adding the alkylimidazole-pyridine ionic liquid surfactant to the solution obtained in step (1);

[0041] (3) Add erucamidopropyl betaine to the solution obtained in step (2), and continue stirring until fully dissolved to obtain a high-temperature acidification diverting agent.

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Abstract

The invention relates to the technical field of acidification and acid fracturing, in particular to a high-temperature acidification diverting agent and a preparation method thereof. The acidification diverting agent includes the following raw materials in terms of mass percentage: erucamide propyl betaine 20%~40%, ionic liquid surfactant 10%~30%, organic additive 3%~5%, and the rest is deionized water. The high-temperature acidification diverting agent provided by the present invention is suitable for reservoir temperatures up to 160°C, and its viscosity can still reach 153mPa·s at 160°C, which can well seal gaps and meet the requirements of turning under high-temperature conditions. The high-temperature acidizing diverting agent provided by the invention greatly improves the viscosity of the diverting acid system at high temperature, and can adapt to more formation conditions; the preparation method provided is simple and easy to operate.

Description

technical field [0001] The invention relates to the technical field of acidification and acid fracturing, in particular to a high-temperature acidification diverting agent and a preparation method thereof. Background technique [0002] Acidizing and acid fracturing is one of the main stimulation measures for carbonate oil and gas reservoirs at present. Acidizing diverting agent is a temporary plugging agent, which can temporarily block high-permeability layers, improve the suction profile of acid liquid, expand the acidizing range, and improve acidifying effect. Steering agents are generally divided into three categories: the first category is foam blocking agent, the gas that produces foam is mainly nitrogen, fatty amine hydrochloride, quaternary ammonium salt or nonionic-anionic surfactant is used as foaming agent; the second category It is polymer diverting agent, benzoic acid sulfamic acid, boric acid, carboxymethyl starch, hydroxyethyl cellulose naphthalene and other c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/74
CPCC09K8/74
Inventor 饶天利张文来王伟华韩利宝高挺王祁邱建玲徐壮举刘波徐涛张琲琲
Owner 滨州市广友化工有限公司
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