Gas well corrosion inhibitor and preparation method thereof

A corrosion inhibitor, oil and gas well technology, applied in earth-moving drilling, wellbore/well components, etc., can solve the problems of thinning of pipe wall corrosion, increased difficulty of demulsification and dehydration of crude oil, poor compatibility of scale inhibitors, etc. Achieve the effect of sulfide stress corrosion inhibition, good sulfide stress corrosion, and overcoming local corrosion

Inactive Publication Date: 2011-04-20
JIAJIANG LONGXING INVESTMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, most domestic oil and gas fields use corrosion inhibitors for corrosion protection. Although these corrosion inhibitors are widely used in the field and have achieved certain anticorrosion effects, they have the following deficiencies: (1) Due to the current limitations of these corrosion inhibitors on the corrosion environment (corrosion medium) The pertinence is not strong, so the protective effect is not outstanding. During the workover operation, many oil and g

Method used

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  • Gas well corrosion inhibitor and preparation method thereof
  • Gas well corrosion inhibitor and preparation method thereof
  • Gas well corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 300kg gemini imidazoline surfactant; 150kg fatty alcohol polyoxyethylene ether phosphate; 100kg polyether demulsifier; 250kg fatty acid amide borate; 300kg solvent.

[0042] According to the formula ratio, add gemini imidazoline surfactant, fatty alcohol polyoxyethylene ether phosphate into a stainless steel reaction kettle, heat to about 75°C, stir for 30min-40min, then add fatty acid amide borate and polyether demulsifier, Stir for 20min to 30min, and finally add solvent and stir for 30min.

Embodiment 2

[0044] Gemini imidazoline surfactant 200kg; 100kg fatty alcohol polyoxyethylene ether phosphate; 50kg polyether demulsifier; 100kg fatty acid amide borate; 200kg solvent (alcohol or other polar solvent).

[0045] According to the formula ratio, add gemini imidazoline surfactant, fatty alcohol polyoxyethylene ether phosphate into a stainless steel reaction kettle, heat to about 75°C, stir for 30min-40min, then add fatty acid amide borate and polyether demulsifier, Stir for 20min to 30min, and finally add solvent and stir for 30min.

Embodiment 3

[0047] 250kg gemini imidazoline surfactant; 120kg fatty alcohol polyoxyethylene ether phosphate; 80kg polyether demulsifier; 180kg fatty acid amide borate; 250kg solvent.

[0048] According to the formula ratio, add gemini imidazoline surfactant, fatty alcohol polyoxyethylene ether phosphate into a stainless steel reaction kettle, heat to about 75°C, stir for 30min-40min, then add fatty acid amide borate and polyether demulsifier, Stir for 20min to 30min, and finally add solvent and stir for 30min.

[0049] The anticorrosion effect of the oil and gas well corrosion inhibitor prepared by the 3 examples is proved by experiments below, and the specific experimental conditions are:

[0050] Evaluation conditions

[0051] Salinity: according to the analysis results of produced water on site, use NaCl, NaHCO 3 、CaCL 2 , MgCL 2 .6H 2 O, Na 2 SO 4 Prepare mineralized water with a total salinity of 105g / L;

[0052] Evaluation pressure: total pressure 16.0Mpa, CO 2 Partial pres...

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Abstract

The invention discloses a gas well corrosion inhibitor and a preparation method thereof. The gas well corrosion inhibitor comprises the following components in percentage by mass: 20-30% of gemini-imidazoline surfactant, 10-15% of fatty alcohol polyoxyethylene ether phosphate, 5-10% of polyether demulsifier, 10-25% of fatty acid amide borate and 20-30% of solvent. The preparation method comprises the following steps: A, adding the gemini-imidazoline surfactant and fatty alcohol polyoxyethylene ether phosphate into a stainless steel agitated reactor, heating to about 75 DEG C, stirring for 30-40 minutes; B, adding the fatty acid amide borate and the polyether demulsifier to the agitated reactor, and stirring for 20-30 minutes; and C, finally adding the solvent to the agitated reactor and stirring for 30 minutes. The gas well corrosion inhibitor can form a firm adsorbed film and drainage protecting film on the surface of the metal so as to prevent the transferring of charges or substances related to corrosion reaction, has excellent capability of overcoming local corrosion and inhibiting pitting corrosion, and can solve the problem of oil-water emulsification and compatibility of the demulsifier, fungicide and an antisludging agent.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation, in particular to an oil and gas well corrosion inhibitor and a preparation method thereof. technical background [0002] The use of corrosion inhibitors is an effective auxiliary means for material corrosion protection in oil and gas field exploitation, and is an economical, convenient and efficient protection technology and protection measure. [0003] At present, most domestic oil and gas fields use corrosion inhibitors for corrosion protection. Although these corrosion inhibitors are widely used in the field and have achieved certain anticorrosion effects, they have the following deficiencies: (1) Due to the current limitations of these corrosion inhibitors on the corrosion environment (corrosion medium) The pertinence is not strong, so the protective effect is not outstanding. During the workover operation, many oil and gas wells were found, and the oil pipes pulled out were ...

Claims

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Application Information

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IPC IPC(8): C09K8/54
Inventor 黄健美
Owner JIAJIANG LONGXING INVESTMENT
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