Composition with bactericidal properties and preparation method and application thereof

By using a composition of non-ionic bactericide and fatty alcohol polyoxyethylene ether, the cross-linking degradation problem caused by the reaction of cationic bactericide and anionic polymer in the existing hydraulic fracturing fluid is solved, and efficient and rapid bactericidal effect is achieved, pipeline corrosion is avoided, and fracturing effect is maintained.

CN115885995BActive Publication Date: 2025-03-28CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Application Number
CN202110956855.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-08-19
Publication Date
2025-03-28
Estimated Expiration
2041-08-19

AI Technical Summary

Technical Problem

The cationic bactericides in existing hydraulic fracturing fluid react with anionic polymer, resulting in cross-linking degradation, affecting the oil dispersion effect, and the sterilization speed is slow, which cannot meet the requirements of the fracturing cycle.

Method used

A composition with bactericidal properties is prepared by mixing non-ionic bactericidal agents, fatty alcohol polyoxyethylene ethers, additives, etc. and adjusting the pH value to 6-8.

Benefits of technology

This composition has the characteristics of small amount of use, good sterilization effect and fast sterilization speed. It can effectively inhibit sulfate reducing bacteria, iron bacteria and saprophytic bacteria, avoid pipeline corrosion and perforation, and is fully compatible with fracturing fluid, so as not to affect the fracturing effect.

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Abstract

The present invention relates to the field of petrochemical mining technology, and discloses a composition with bactericidal properties, a preparation method thereof and an application thereof. The composition contains a nonionic bactericide and a fatty alcohol polyoxyethylene ether, wherein the weight ratio of the nonionic bactericide to the fatty alcohol polyoxyethylene ether is 1-2.5:1. The preparation method of the composition comprises: mixing the nonionic bactericide, the fatty alcohol polyoxyethylene ether and an auxiliary agent, and adjusting the pH value to 6-8. The fracturing fluid containing the composition of the present invention can reduce the bacterial content to less than 25 / mL within 10-15 minutes, and the composition of the present invention has the characteristics of small usage, good bactericidal effect and fast bactericidal speed.
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