Iron ion stabilizer for acidification of oil field and preparation method of iron ion stabilizer

By using a compound iron ion stabilizer, which combines polycarboxylic acid, diethylenetriaminepentamethylphosphonic acid, gluconic acid, and isoascorbic acid, the problem of easy decomposition of existing iron ion stabilizers at high temperatures is solved, achieving high stability and temperature resistance, and improving the acidification treatment effect.

CN122445342APending Publication Date: 2026-07-24BINZHOU GUANGYOU CHEM CO LTD
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Patent Information

Application Number
CN202610596820.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-30
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing iron ion stabilizers are prone to decomposition and failure under high-temperature deep well conditions, and cannot effectively chelate iron ions, leading to the reformation of precipitates and affecting the acidizing and production enhancement effect.

Method used

A compound iron ion stabilizer is used, which is composed of polycarboxylic acid, diethylenetriaminepentamethylphosphonic acid, gluconic acid and isoascorbic acid. Through chelation, coordination and dispersion, it prevents iron ion precipitation and improves stability and temperature resistance.

Benefits of technology

It achieves a stable iron ion concentration of 242 mg/ml at room temperature and remains stable at 238 mg/ml after being kept at 120℃ for 4 hours, effectively preventing iron precipitation and improving the acidification treatment effect.

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Abstract

The invention belongs to the technical field of oil exploitation, and particularly relates to an iron ion stabilizer for acidification of an oil field and a preparation method thereof. The iron ion stabilizer for acidification of the oil field is prepared from the following raw materials in percentage by weight: 0.1 to 0.3 percent of polycarboxylic acid, 0.1 to 0.3 percent of diethylenetriaminepenta (methylene phosphonic acid), 0.05 to 0.1 percent of gluconic acid, 0.02 to 0.05 percent of erythorbic acid and the balance of water. The structural formula of the polycarboxylic acid is shown in the specification, and n is a natural number greater than 2. The iron ion stabilizer has the advantages of being high in iron ion stabilizing capacity and resistant to high temperature; the capability of stabilizing iron ions at normal temperature can reach up to 242 mg / ml; and after the constant temperature of 120 DEG C is kept for 4 hours, stable iron ions can reach 238 mg / ml to the maximum.
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