Guanidyl disinfecting anti-scaling inhibitor for oilfield water reinjection

A scale and corrosion inhibitor, oilfield reinjection water technology, applied in the direction of biocide, application, disinfectant, etc., can solve the problems of bacterial resistance, poor effect, high cost of use, etc., to reduce production costs, broad-spectrum bactericidal performance, Strong antibacterial activity

Inactive Publication Date: 2018-08-17
东营利丰化工新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Oilfield reinjection water is a large amount of sewage reinjected into the oil well during the secondary oil recovery of the oilfield. These reinjected sewage are generally treated oilfield sewage, but still have a certain degree of salinity and a certain amount of sulfate reducing bacteria and saprophytic bacteria. Microorganisms such as bacteria and iron bacteria, the growth, metabolism and reproduction of these microorganisms cause corrosion of metal pipelines, affecting the normal use of oilfield pipelines and causing huge economic losses to oilfield production
At present, there are many types of f...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First step response:

[0019] Mix 100 parts by weight of guanidine hydrochloride (A) and 120 parts by weight of propylenediamine (B) at room temperature, heat up to 80°C while stirring and keep warm, and continue stirring for 2 hours to synthesize guanamine hydrochloride (C).

[0020] Second step reaction:

[0021] Guanamine hydrochloride (C) was cooled to normal temperature, then 220 parts by weight of water was added, and 1 part by weight of Tween-80 surfactant (D) was added at the same time, stirred and dissolved to generate guanamine hydrochloride solution (E);

[0022] The third step reaction:

[0023] The guanamine hydrochloride solution (E) is reacted with 5 parts by weight of maleic anhydride (F) to generate the final functional guanidine hydrochloride solution (G), which is a guanidine-based bactericidal scale and corrosion inhibitor.

[0024] The functional guanidine hydrochloride solution (G) prepared at 30ppm was added to the oil field reinjection water fo...

Embodiment 2

[0026] First step response:

[0027] Mix 100 parts by weight of guanidine hydrochloride (A) with 160 parts by weight of hexamethylenediamine (B) at room temperature, heat up to 80°C while stirring and keep warm, and continue stirring for 2 hours to synthesize guanidine hydrochloride (C).

[0028] Second step reaction:

[0029] Cool Guanidine Hydrochloride (C) to normal temperature, then add 260 parts by weight of water, and at the same time add 2 parts by weight of mixed surfactant (D) with a weight ratio of Tween-20 and Tween-80 of 1:1, stir and dissolve to generate hydrochloric acid Guanamine solution (E);

[0030] The third step reaction:

[0031] The guanidine hydrochloride solution (E) reacts with 16 parts by weight of oxalic acid (F) to generate the final product guanidine hydrochloride solution (G), which is the guanidine-based bactericidal scale and corrosion inhibitor.

[0032] The functional guanidine hydrochloride solution (G) prepared at 30ppm was added to oil f...

Embodiment 3

[0034] First step response:

[0035] Mix 100 parts by weight of guanidine hydrochloride (A) and 125 parts by weight of dicyandiamide (B) at room temperature, heat up to 80°C while stirring and keep warm, and continue stirring for 2 hours to synthesize guanamine hydrochloride (C).

[0036] Second step reaction:

[0037] Guanamine hydrochloride (C) was cooled to normal temperature, then 270 parts by weight of water was added, and 5 parts by weight of Tween-20 surfactant (D) was added at the same time, stirred and dissolved to generate guanamine hydrochloride solution (E);

[0038] The third step reaction:

[0039] The guanamine hydrochloride solution (E) is reacted with 6 parts by weight of maleic anhydride (F) to generate the final functional guanidine hydrochloride solution (G), which is a guanidine-based bactericidal scale and corrosion inhibitor.

[0040] The functional guanidine hydrochloride solution (G) prepared at 30ppm was added to the reinjection water of the oil fie...

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PUM

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Abstract

The invention provides a guanidyl disinfecting anti-scaling inhibitor for oilfield water reinjection. A production method includes: 1) mixing 100 parts by weight of guanidine hydrochloride and 120-180parts of amine to allow reacting at 80 DEG C, stirring while heating, holding the temperature of 80 DEG C, continuing to stir to allow reacting for 2 hours so as to synthesize aminoguanidine hydrochloride; 2) cooling the aminoguanidine hydrochloride to normal temperature, adding 200-300 parts by weight of water, adding 1-5 parts by weight of a surfactant, and stirring and dissolving to generate aminoguanidine hydrochloride solution; 3) allowing the aminoguanidine hydrochloride solution to react with 1-20 parts by weight of an acid to generate a finished functional guanidine hydrochloride solution, namely the guanidyl disinfecting anti-scaling inhibitor for oilfield water reinjection. The guanidyl disinfecting anti-scaling inhibitor for oilfield water reinjection has the advantages that the inhibitor has high antibacterial activity, broad-spectrum disinfecting performance, is especially efficient to kill sulfate-reducing bacteria, saprophytic bacteria, iron bacteria and the like in oilfield water, and can also remove scaling matters in the oilfield water and water scale generated on the inner wall of a duct.

Description

technical field [0001] The invention belongs to the field of bactericidal, scale, and corrosion inhibitors for oilfield reinjection water, and in particular relates to a guanidine-based bactericidal, scale, and corrosion inhibitor for oilfield reinjection water. Background technique [0002] Oilfield reinjection water is a large amount of sewage reinjected into the oil well during the secondary oil recovery of the oilfield. These reinjected sewage are generally treated oilfield sewage, but still have a certain degree of salinity and a certain amount of sulfate reducing bacteria and saprophytic bacteria. Microorganisms such as bacteria and iron bacteria, the growth, metabolism and reproduction of these microorganisms cause corrosion of metal pipelines, affecting the normal use of oilfield pipelines and causing huge economic losses to oilfield production. At present, there are many types of fungicides, but many fungicides cannot be widely used in oil fields due to the high cos...

Claims

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Application Information

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IPC IPC(8): A01N47/44A01P1/00C07C277/00C07C279/02C02F5/12C02F103/10
CPCA01N47/44C02F5/12C02F2103/10C02F2303/04C02F2303/08C02F2303/22C07C277/00C07C279/02
Inventor 甄志超季君晖王萍丽徐天申王永辉丁解放董建荣
Owner 东营利丰化工新材料有限公司
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