Inhibitor suitable for soluble alkaline salt scale and preparation method thereof

By using soluble alkaline salt scale inhibitors made of amphiphilic modified graphene oxide TAS-GO, surfactant, inorganic salt and deionized water, the problem of water salt scale formation at high mineralization at high temperature is solved, and the efficient salt scale inhibition effect is achieved under high temperature and high alkali conditions.

CN119709153AActive Publication Date: 2025-03-28XINJIANG GUANGYA OIL & GAS NEW TECH DEV CO LTD
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Patent Information

Application Number
CN202510233175.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-28
Publication Date
2025-03-28
Estimated Expiration
2045-02-28

AI Technical Summary

Technical Problem

The prior art is difficult to effectively suppress the salt scale problem of high-mineralization formation water mainly composed of sodium carbonate and sodium bicarbonate at high temperatures, and conventional salt inhibitors have limited effects under this condition.

Method used

The soluble alkaline salt scale inhibitor is used to make amphiphilic modified graphene oxide TAS-GO, surfactant, inorganic salt and deionized water. The metal ion chelating and hydrophobic association of amphiphilic modified graphene oxide are synergistically improved.

Benefits of technology

This inhibitor significantly improves the salt scale inhibition effect under high temperature, high alkali and high mineralization conditions, and can effectively solve the problems of water injection, fracturing and re-discharge formations and wellbore salt formation in oil fields, and has good promotion prospects.

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Abstract

The invention discloses a soluble alkaline salt scale inhibitor and a preparation method thereof, and belongs to the technical field of oilfield chemistry. The soluble alkaline salt scale inhibitor is prepared from amphiphilic modified graphene oxide, a surfactant, inorganic salt and deionized water, the amphiphilic modified graphene oxide contains a large amount of carboxyl groups, sulfonic acid groups, hydroxyl groups and the like, and has good metal ion chelating property; meanwhile, through the hydrophobic association effect and hydrogen-bond interaction between modified graphene grafted long carbon chains, the bonding probability between sodium ions of the soluble saline-alkali salt and bicarbonate radicals, carbonate radicals and chloride ions is further weakened, and through the synergistic effect of the amphiphilic modified graphene oxide, the surfactant and the inorganic salt, the salt scale inhibition effect is further improved; the method is especially suitable for soluble alkali salt water quality conditions of high temperature, high alkali and high salinity, can solve the problems of oilfield water injection, fracturing flowback strata and wellbore salt deposition, and has a good popularization prospect.
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