Environment-friendly oilfield reinjection water corrosion and scale inhibitor and preparation method thereof

A technology for reinjection of oilfield water and corrosion and scale inhibitors, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., can solve the problem of poor corrosion inhibition performance and scale inhibition effect of scale inhibitors Unsatisfactory, oil well production reduction and other problems, to achieve the effect of environmental friendliness, enhanced thermal stability and corrosion inhibition effect, and easy control of conditions

Inactive Publication Date: 2015-12-16
无棣华信石油技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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.
[0003] As a kind of water treatment agent, scale inhibitors are widely used in petroleum, chemical and other fields. Since the 1960s, water treatment agents have been continuously developed, and natural polymer lignin and sodium phytate are mostly used as scale inhibitors and dispersants. , the anti-scaling effect is not ideal
At present, organic phosphonates are the most widely used scale inhibitors, but they will cause greater pollution to the environment, and the existing scale inhibitors have poor corrosion inhibition performance. Therefore, an environmentally friendly corrosion inhibitor is studied. Scaling agent is an urgent problem to be solved in the field of petroleum additive technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of an environment-friendly oilfield reinjection water corrosion and scale inhibitor, comprising the following steps:

[0030] Step (1), in parts by weight, weigh 0.03 parts of Ding Gong Teng extract, 0.04 parts of methyl dihydroartemisinate, 8 parts of citric acid, 2 parts of tannic acid, 1 part of mercaptobenzothiazole sodium, gluconic acid 3 parts of -δ-lactone, 1 part of potassium guaiacol sulfonate, 0.5 part of sulfosuccinate, 0.2 part of N-(3-triethoxysilylpropyl) glucamide, 2 parts of ethyl acetate , 10 parts of ethanol, 80 parts of water;

[0031] Step (2), the tannic acid, methyl dihydroartemisinate, sodium mercaptobenzothiazole, glucono-δ-lactone, sulfosuccinate and N-(3- Triethoxysilylpropyl) glucamide was added to ethyl acetate, and mechanically stirred at a speed of 100r / min until uniformly mixed to obtain a mixed solution A;

[0032] In step (3), add the Ding Gong Teng extract, citric acid and potassium guaiacol sulfonate weighed in s...

Embodiment 2

[0039] A preparation method of an environment-friendly oilfield reinjection water corrosion and scale inhibitor, comprising the following steps:

[0040] Step (1), in parts by weight, weigh 0.05 parts of Ding Gong Teng extract, 0.1 parts of methyl dihydroartemisinate, 10 parts of citric acid, 5 parts of tannic acid, 3 parts of mercaptobenzothiazole sodium, gluconic acid 6 parts of -δ-lactone, 4 parts of potassium guaiacol sulfonate, 0.8 parts of sulfosuccinate, 0.5 parts of N-(3-triethoxysilylpropyl) glucamide, 5 parts of ethyl acetate , 15 parts of ethanol, 100 parts of water;

[0041] Step (2), the tannic acid, methyl dihydroartemisinate, sodium mercaptobenzothiazole, glucono-δ-lactone, sulfosuccinate and N-(3- Triethoxysilylpropyl) glucamide was added to ethyl acetate, and mechanically stirred at a speed of 200r / min until uniformly mixed to obtain a mixed solution A;

[0042] In step (3), add the Ding Gong Teng extract, citric acid and potassium guaiacol sulfonate weighed...

Embodiment 3

[0049] A preparation method of an environment-friendly oilfield reinjection water corrosion and scale inhibitor, comprising the following steps:

[0050] Step (1), in parts by weight, weigh 0.04 parts of Ding Gong Teng extract, 0.06 parts of methyl dihydroartemisinate, 9 parts of citric acid, 4 parts of tannic acid, 2 parts of mercaptobenzothiazole sodium, gluconic acid 5 parts of -δ-lactone, 3 parts of potassium guaiacol sulfonate, 0.7 parts of sulfosuccinate, 0.3 parts of N-(3-triethoxysilylpropyl) glucamide, 4 parts of ethyl acetate , 12 parts of ethanol, 90 parts of water;

[0051] Step (2), the tannic acid, methyl dihydroartemisinate, sodium mercaptobenzothiazole, glucono-δ-lactone, sulfosuccinate and N-(3- Triethoxysilylpropyl) glucamide was added to ethyl acetate, and mechanically stirred at a speed of 150r / min until uniformly mixed to obtain a mixed solution A;

[0052] In step (3), add the Ding Gong Teng extract, citric acid and potassium guaiacol sulfonate weighed ...

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Abstract

The invention relates to an environment-friendly oilfield reinjection water corrosion and scale inhibitor and a preparation method thereof, and belongs to the technical field of petroleum additives. The environment-friendly oilfield reinjection water corrosion and scale inhibitor is prepared by using an erycibe obtusifolia extract, dihydro arteannuic acid methyl ester, citric acid, tannic acid, sodium hydrosulfuryl benzothiazole, gluconic acid-delta-lactone, potassium guaiacolsulfonate, sulfosuccinate, N-(3-triethoxysilylpropyl)gluconamide, ethyl acetate, ethanol and water as raw materials through a series of steps. The prepared corrosion and scale inhibitor has excellent scale inhibition performance and corrosion inhibition performance; through experiment measurement, the corrosion inhibition rate is greater than or equal to 97%, and the scale inhibition rate is greater than or equal to 96%. The preparation method is simple, and the prepared environment-friendly oilfield reinjection water corrosion and scale inhibitor is phosphine-free, environment-friendly, and excellent in thermostability. The condition required by the preparation process is easy to control, the energy consumption is low, the operation is simple, the preparation process is free of discharge of the 'three wastes', and belongs to the cleaner production technology, and popularization and application are facilitated.

Description

technical field [0001] The invention belongs to the technical field of petroleum additives, and in particular relates to an environment-friendly oil field reinjection water corrosion and scale inhibitor and a preparation method thereof. Background technique [0002] The secondary oil recovery process in the oil field adopts sewage reinjection treatment, and the reinjection water 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 water injection pipelines can cause failures such as pipe plugging, pump jams, and increased water injection pressure, resulting in serious hazards such as decreased water injection efficiency and greatly reduced oil well production. [0003] As a kind of water treatment agent, scale inhibitors are widely used in petroleum, chemical and other fields. Since the 1960s, water treatment agents have been continuously dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10C02F5/12
Inventor 李瑞国
Owner 无棣华信石油技术服务有限公司
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