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Environment-friendly oilfield water injection scale inhibitor and preparation method thereof

A technology of oilfield water injection and antiscalant, which is applied in the fields of chemical instruments and methods, mining wastewater treatment, descaling and water softening, etc. Good scale and dispersion performance, low cost, good water solubility

Inactive Publication Date: 2017-02-22
JIANGSU JINGWEI TECH INNOVATION CONSULTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides an oil field water injection environment-friendly scale inhibitor and its preparation method, which solves the technical problems of low scale inhibition rate, high corrosion rate and high cost of existing scale inhibitors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The first step: weighing according to the ratio of parts by mass: 100 parts of pure water; 20 parts of sodium polyaspartate; 20 parts of HPMA; 10 parts of acrylic acid; 16 parts of hydroxypropyl acrylate; 12 parts of methyl methacrylate; 20 parts of ethyl ester; 21 parts of sodium styrene sulfonate; 3 parts of allyl glyceryl ether; 8 parts of sodium allyl sulfonate; 6 parts of vinyl sulfonic acid.

[0023] The second step: put acrylic acid, hydroxypropyl acrylate, methyl methacrylate and HPMA into a reaction kettle equipped with a thermometer, a heating device and a stirring device, raise the temperature to 60°C, stir for 100 min, and the stirring speed is 90 rpm.

[0024] The third step: raise the temperature to 100°C, add vinylsulfonic acid and the remaining raw materials, adjust the pH value to 6, and stir for 2 hours.

[0025] The raw material is a commercially available product, which is easy to obtain, has good water solubility, and the discharged water will not c...

Embodiment 2

[0027] The first step: weighing according to the ratio of parts by mass: 100 parts of pure water; 60 parts of sodium polyaspartate; 40 parts of HPMA; 30 parts of acrylic acid; 20 parts of hydroxypropyl acrylate; 18 parts of methyl methacrylate; 40 parts of ethyl ester; 25 parts of sodium styrene sulfonate; 7 parts of allyl glyceryl ether; 12 parts of sodium allyl sulfonate; 10 parts of vinyl sulfonic acid.

[0028] The second step: put acrylic acid, hydroxypropyl acrylate, methyl methacrylate and HPMA into a reaction kettle equipped with a thermometer, a heating device and a stirring device, raise the temperature to 80°C, stir for 140 minutes, and the stirring speed is 110 rpm.

[0029] The third step: raise the temperature to 120°C, add vinylsulfonic acid and the remaining raw materials, adjust the pH value to 7, and stir for 4 hours.

[0030] The raw material is a commercially available product, which is easy to obtain, has good water solubility, and the discharged water wil...

Embodiment 3

[0032] The first step: weighing according to the ratio of parts by mass: 100 parts of pure water; 30 parts of sodium polyaspartate; 25 parts of HPMA; 15 parts of acrylic acid; 17 parts of hydroxypropyl acrylate; 13 parts of methyl methacrylate; 25 parts of ethyl ester; 22 parts of sodium styrene sulfonate; 4 parts of allyl glyceryl ether; 9 parts of sodium allyl sulfonate; 7 parts of vinyl sulfonic acid.

[0033] The second step: put acrylic acid, hydroxypropyl acrylate, methyl methacrylate and HPMA into a reaction kettle equipped with a thermometer, a heating device and a stirring device, raise the temperature to 60°C, stir for 100 min, and the stirring speed is 90 rpm.

[0034] The third step: raise the temperature to 100°C, add vinylsulfonic acid and the remaining raw materials, adjust the pH value to 6, and stir for 2 hours.

[0035] The raw material is a commercially available product, which is easy to obtain, has good water solubility, and the discharged water will not c...

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Abstract

An environment-friendly oilfield water injection scale inhibitor is prepared from pure water, poly-sodium aspartate, HPMA (hydroxypropyl methacrylate), acrylic acid, hydroxy-propyl acrylate, methyl methacrylate, ethyl acrylate, ammonium persulfate, allyl glyceroether, sodium allysulfonate and vinylsulfonic acid. Raw materials are commercial and biodegradable products, easily obtained and good in water solubility, scale inhibition and dispersibility, low in cost and dosage, simple in process, environmentally friendly, efficient, high in conversion rate and convenient to use and can be widely used, eutrophication pollution of water caused by discharged water cannot be avoided, calcium carbonate scale inhibition, calcium sulfate scale inhibition and barium sulfate scale inhibition of synergistic effect are excellent, energy is saved, production process is clean, various components generate synergistic effect, the corrosion rate of the scale inhibitor for carbon steel is 0.003-0.007 micrometers*a-1, the scale inhibition rate of the scale inhibitor for calcium carbonate is 94.5-98.5%.

Description

technical field [0001] The invention relates to an environment-friendly material, in particular to an environment-friendly scale inhibitor for oilfield water injection and a preparation method thereof. Background technique [0002] Scale inhibitor: It is a class of agents that can disperse insoluble inorganic salts in water, prevent or interfere with the precipitation and scaling of insoluble inorganic salts on metal surfaces, and maintain good heat transfer effects on metal equipment . [0003] From the perspective of the mechanism of action, the role of scale inhibitors can be divided into three parts: chelation, dispersion and lattice distortion. And in the laboratory evaluation test, the dispersion effect is the remedial measure of the chelation effect, and the lattice distortion effect is the remedial measure of the dispersion effect. [0004] Scale inhibitor for oilfield reinjection water is a colorless or light yellow uniform liquid, used for sewage reinjection in o...

Claims

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Application Information

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IPC IPC(8): C02F5/12C02F5/10C02F103/10
CPCC02F5/12C02F5/10C02F2103/10
Inventor 王静
Owner JIANGSU JINGWEI TECH INNOVATION CONSULTING CO LTD
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