Oil and gas field acidification high-temperature corrosion Inhibitor and preparation method thereof

A technology of high temperature corrosion inhibitor and corrosion inhibitor synergist, which is applied in chemical instruments and methods, earthwork drilling, mining fluids, etc. Good acid solubility

Inactive Publication Date: 2015-08-26
CHINA UNIV OF PETROLEUM (BEIJING) +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the current field use of high-temperature acidification corrosion inhibitors in China, there are few high-temperature resis...

Method used

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  • Oil and gas field acidification high-temperature corrosion Inhibitor and preparation method thereof
  • Oil and gas field acidification high-temperature corrosion Inhibitor and preparation method thereof
  • Oil and gas field acidification high-temperature corrosion Inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Add 317.5 grams of acetophenone and 72.2 grams of formaldehyde into a three-necked flask, add 2 milliliters of acidic catalyst (analytical grade hydrochloric acid), heat up to 90 degrees Celsius at a rate of 16 degrees Celsius / hour, keep the temperature for 5 hours, and turn on the condenser to reflux during the reaction. After the reaction is completed, let it stand for 5 hours, release the water in the lower layer, and obtain the aldehyde and ketone condensate; add 223.9 grams of aniline dropwise at 30°C, and then raise the temperature to 70°C at a rate of 16°C / hour, and keep the temperature for 6 hours, and the reaction is completed After cooling down to 30°C, the ketone aldehyde amine condensation product was obtained. Add 150 grams of aldehyde, ketone, and amine condensate, 15 grams of octynol, 25 grams of copper acetate, and 310 grams of ethanol into a 1000-milliliter ground bottle, mix well, and let stand for 1.5 hours to prepare the finished product A of high-tem...

Embodiment 2

[0040] Add 178.1 grams of cyclohexanone and 175.2 grams of benzaldehyde into a three-necked flask, add 2 milliliters of acidic catalyst (analytical grade hydrochloric acid), heat up to 90 degrees Celsius at a rate of 16 degrees Celsius / hour, keep the temperature for 5.5 hours, and open the condenser to reflux during the reaction , After the reaction was completed, let it stand for 5 hours, release the water in the lower layer, and obtain the aldehyde and ketone condensate; add 276.2 grams of propynyloxymethylaniline dropwise at 40 ° C (respectively 196.3 grams, 105.1 grams and 326.1 grams of propynyl alcohol, formaldehyde and aniline gram into a three-necked flask, then add 8.4 milliliters of analytical grade hydrochloric acid to catalyze, and react at 70° C. for 5 hours to obtain propargyloxymethylaniline), after dropping, the temperature is raised to 70° C. at a speed of 16° C. / hour, and the heat preservation reaction is carried out for 6 Hours, after the completion of the re...

Embodiment 3

[0042] Add 118.8 grams of cyclohexanone and 33.0 grams of formaldehyde into a three-necked flask, add 2 milliliters of an acidic catalyst (analytical grade hydrochloric acid), heat up to 80 degrees Celsius at a rate of 16 degrees Celsius / hour, keep the temperature for 5 hours, and turn on the condenser to reflux during the reaction. After the reaction was completed, let it stand for 5 hours, release the water in the lower layer to obtain the aldehyde and ketone condensate; add 483.1 grams of polyethylene polyamine dropwise at 35 ° C (produced by Tosoh Corporation in Japan, distributed by Shanghai Zhongyi Chemical Industry), and after the drop was completed, the mixture was cooled at 16 ° C. Raise the temperature to 75° C. at a speed of 1 hour, keep the temperature for 5 hours, and cool down to 30° C. after the reaction is completed, to obtain a ketoaldehyde amine condensate. Add 150 grams of aldehyde, ketone, and amine condensate, 25 grams of acetylene alcohol, 25 grams of copp...

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Abstract

The invention provides an oil and gas field acidification high-temperature corrosion inhibitor which is composed of the components of, by mass, 30-50% of an aldehyde ketone amine condensate, 2-5% of a corrosion inhibition synergist, 5-10% of a high-temperature synergist, and balance of an alcoholic organic solvent. A preparation method of the aldehyde ketone amine condensate comprises the following step: under the effect of an acidic catalyst, aldehyde, ketone and amine are subjected to a Mannich condensation reaction, such that the aldehyde ketone amine condensate is obtained. According to the invention, the aldehyde ketone amine condensate is adopted as a main component, and is compounded with the corrosion inhibition synergist and the high-temperature synergist, such that the corrosion inhibitor is obtained. The aldehyde ketone amine condensate has the advantages of good acid solubility, low corrosion rate, low product viscosity, no irritating odor, no low-temperature (-20 DEG C) crystallization, convenient on-site application, and the like. The high-temperature corrosion inhibitor provided by the invention can be used in acidification works of high-temperature stratums with high-concentration hydrochloric acid and mud acid.

Description

technical field [0001] The invention belongs to the technical field of oil and gas production enhancement, and in particular relates to a high-temperature corrosion inhibitor for oil and gas field acidification and a preparation method thereof. Background technique [0002] Acidizing is a measure widely used in oil and gas fields to increase production and injection. During the process of injecting acid liquid into the formation, it will corrode the ground equipment, pipelines, wellbore and construction pipe strings, which will lead to operation failure and construction accidents in severe cases. Moreover, Fe 3+ Entering the formation will cause plugging damage to the porosity and permeability of the reservoir. Therefore, an effective corrosion inhibitor must be added to the acid solution for construction. As the energy situation becomes more serious, the oil and gas industry gradually develops into unconventional, deep well and ultra-deep well oil and gas reservoirs. A lar...

Claims

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Application Information

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IPC IPC(8): C09K8/74E21B43/27
CPCC09K8/74C09K2208/32E21B43/26
Inventor 蒋建方张祖国邹新华高泉吴川张汝生蒋睿刘光普曹科学
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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