Compound inhibitor for exploitation of oil-gas field and preparation method thereof

Abstract

The invention discloses an oil gas field exploitation used compound inhibitor and the preparation method. The compound inhibitor contains imidazolinyl organic phosphate, 2 - N-acid butyrate -1, 2, 4-tricarboxylic acid, thiourea, cetylpyridinium chloride. The mixture proportions of all constituents by weight can meet the specified contents of all active substances. The preparation method is that the 2 - N-acid butyrate -1, 2, 4 - tricarboxylic acid is added into imidazolinyl organic phosphate; thiourea is added into and dissolved into water; the solutions obtained by sub-steps are mixed together and are added into the cetylpyridinium chloride; after evenly stirring for 50-90 minutes and keeping the temperature rang within 15-45 DEG C, the inhibitor of the invention is produced. The compound inhibitor uses multifold medicaments for synergia, can prevent scale formation, can kill bacteria or inhabit bacteria from growing with less usage, can be applied to wide range, and can perform excellent efficiency under complex water quality condition.

Description

Technical field: [0001] The invention relates to a corrosion inhibitor for oil and gas field development, in particular to a composite corrosion inhibitor for oil and gas field development and a preparation method thereof. Background technique: [0002] With the development of the petroleum and natural gas industry, my country's oilfields are gradually in the middle and late stages of exploitation, and have entered the stage of high recovery ratio and high water content. Oil-water separation in oilfields is becoming more difficult, crude oil becomes thicker and heavier, and water and salt content increase. The increase in sulfur content and acid value increases the corrosiveness of crude oil, and more and more attention is paid to the corrosion and protection of water injection and oil pipelines. [0003] As engineering materials, iron and steel materials are widely used in the petroleum industry. In the process of use, it is inevitable to be in contact with various corrosive...

AI Technical Summary

Problems solved by technology

[0004] At present, imidazoline and its derivatives are widely used in oil and gas field exploitation, which have disadvantages such as excessive dosage, small application range, and poor impact resistance. Corrosion inhibitors with a single compound have been difficult to completely solve the corrosion inhibition problem. Scaling and bacterial growth in oil and gas fields will aggravate the corrosion rate and make the corrosion inhibitor lose its effectiveness. It is necessary to use a variety of agents to synergize to prevent scaling, kill or inhibit bacterial growth, thereby preventing corrosion. There is an urgent need for a Composite corrosion inhibitor for oil and gas field development with low dosage, wide application range, and excellent performance under complex water quality conditions

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