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Scale inhibitor of oilfield reinjection water and preparation method of scale inhibitor

A technology for reinjecting water and antiscalants in oilfields, which is applied in chemical instruments and methods, earthwork drilling and production, wellbore/well components, etc. It can solve the problems of poor dispersion of iron oxide and zinc salts, unsatisfactory slow-release effect, water injection pressure, etc. Problems such as rising, achieving the effect of simple preparation method, easy popularization and application, and smooth progress

Inactive Publication Date: 2015-04-01
JIANGSU JIANSHEN BIOLOGY AGROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in mining, reinjection water often contains a large amount of calcium, magnesium, strontium, barium plasma, which correspondingly brings problems such as calcium and magnesium scaling and corrosion of pipelines
Scaling of the water injection pipeline can cause failures such as pipe blockage, pump stuck, and increased water injection pressure, resulting in serious hazards such as reduced water injection efficiency and greatly reduced oil well production.
[0005] At present, the oil field reinjection water scale inhibitors used in the market have poor dispersibility to iron oxide and zinc salt, and the slow release effect is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A scale inhibitor for oilfield reinjection water, comprising the following components in parts by weight:

[0026] 1 part of Haijinsha, 0.5 part of Tobacco, 1 part of poloxamer, 2 parts of povidone, 0.5 part of chlorobutanol, 8 parts of bistrifluoromethanesulfonimide, 3 parts of niacin, sodium citrate 4 parts, 20 parts ethanol, 50 parts water.

[0027] The preparation method of the oilfield reinjection water scale inhibitor of the present embodiment comprises the following steps:

[0028] Step (1), pulverize sea ginseng and tobacco with a jet mill to 100-200 mesh, then place them in ethanol, at 40°C, after ultrasonication for 60 minutes, let stand, centrifuge, and take the supernatant;

[0029] Step (2), dissolve nicotinic acid and sodium citrate in water, then heat to 47°C, add poloxamer and povidone to it while maintaining the temperature, disperse at a high speed of 12000rpm / min for 10min, and cool down to room temperature, get a dispersion;

[0030] In step (3), ...

Embodiment 2

[0032] A scale inhibitor for oilfield reinjection water, comprising the following components in parts by weight:

[0033] 2 parts of Haijinsha, 3 parts of Tobacco, 2 parts of poloxamer, 4 parts of povidone, 1 part of chlorobutanol, 12 parts of bistrifluoromethanesulfonimide, 6 parts of niacin, sodium citrate 6 parts, 30 parts of ethanol, 65 parts of water.

[0034] The preparation method of the oilfield reinjection water scale inhibitor of the present embodiment comprises the following steps:

[0035] Step (1), pulverize Haijinsha and tobacco with a jet mill to 100-200 mesh, then put them in ethanol, at 48°C, after ultrasonication for 90 minutes, let stand, centrifuge, and take the supernatant;

[0036] Step (2), dissolve nicotinic acid and sodium citrate in water, then heat to 52°C, add poloxamer and povidone into it while maintaining the temperature, disperse at a high speed of 12000rpm / min for 20min, and cool down to room temperature, get a dispersion;

[0037] In step (...

Embodiment 3

[0039] A scale inhibitor for oilfield reinjection water, comprising the following components in parts by weight:

[0040] Haijinsha 1.6 parts, Tobacco 1 part, Poloxamer 1.4 parts, Povidone 2.5 parts, Chlorobutanol 0.8 parts, Bistrifluoromethanesulfonylimide 10 parts, Niacin 5 parts, Sodium citrate 5.5 parts, 24 parts ethanol, 58 parts water.

[0041] The preparation method of the oilfield reinjection water scale inhibitor of the present embodiment comprises the following steps:

[0042] Step (1), pulverize Haijinsha and tobacco with a jet mill to 100-200 mesh, then place them in ethanol, at 42°C, after ultrasonication for 66 minutes, let stand, centrifuge, and take the supernatant;

[0043] Step (2), dissolve nicotinic acid and sodium citrate in water, then heat to 50°C, add poloxamer and povidone into it while maintaining the temperature, disperse at a high speed of 12000rpm / min for 13min, and cool down to room temperature, get a dispersion;

[0044] In step (3), bistriflu...

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Abstract

The invention relates to a scale inhibitor of oilfield reinjection water and a preparation method of the scale inhibitor and belongs to the technical field of petroleum additives. The scale inhibitor of the oilfield reinjection water comprises the following ingredients in parts by weight: 1-2 parts of spora lygodii, 0.5-3 parts of pluchea indica, 1-2 parts of poloxamer, 2-4 parts of povidone, 0.5-1 part of chlorobutanol, 8-12 parts of bis-trifluoromethane sulfonimide, 3-6 parts of nicotinic acid, 4-6 parts of sodium citrate, 20-30 parts of alcohol and 50-65 parts of water. The preparation method is simple and wide in raw material source, the scale inhibitor has outstanding scale inhibition performance and corrosion inhibition performance, with the adoption of the scale inhibitor, corrosion of an oilfield water injection system can be effectively avoided and inhibited, smooth crude oil exploitation is ensured, the working efficiency is improved, and the scale inhibitor is easy to popularize and apply.

Description

technical field [0001] The invention belongs to the technical field of petroleum additives, and in particular relates to an oil field reinjection water scale inhibitor and a preparation method thereof. Background technique [0002] After the oil field is put into development, the energy of the oil layer itself will be continuously consumed, resulting in a continuous drop in the pressure of the oil layer, a large amount of degassing of underground crude oil, an increase in viscosity, and a significant reduction in oil well production. In order to maintain or increase the reservoir pressure and obtain a higher recovery rate, it is necessary to inject water into the oil field. [0003] Oilfield water injection is to use water injection wells to inject water into the oil layer to supplement and maintain the pressure of the oil layer. The diffusion ability of water in the oil layer keeps the oil layer at a high pressure level. Since the pressure of the oil layer is always above ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/528C09K8/54
CPCC09K8/528C09K8/54C09K2208/32
Inventor 杨月忠
Owner JIANGSU JIANSHEN BIOLOGY AGROCHEM
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