Gas well corrosion inhibitor and preparation method thereof

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 ...

AI Technical Summary

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 gas wells were found, and the oil pipes pulled out were corroded and damaged. , the local area was severely damaged, causing the tubing to break and fall into the well, which affected and restricted the normal production of the oil and gas field

(2) Oil-water emulsification occurs after use, which on the one hand causes oil pipe blockage and increases the difficulty of demulsification and dehydration of crude oil

(3) Poor compatibility with demulsifiers, fungicides, and scale inhibitors

Images