Corrosion and scale inhibitor for oil field as well as preparation method and application of corrosion and scale inhibitor

A corrosion and scale inhibitor, oil field technology, applied in the direction of scale removal and water softening, chemical instruments and methods, special treatment targets, etc., can solve the problems of weakening the scaling rate of produced water and poor effect, and achieve excellent corrosion inhibition The effect, the preparation method is simple and easy, and the effect of less raw materials

Inactive Publication Date: 2017-01-11
林少忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the general antiscalant has a certain antiscaling effect on the produced water, the effect is not good due to the influence of the formula of the antiscalant itself, and it does not weaken the scaling rate in the produced water, and can only temporarily inhibit the antiscaling effect. Scale phenomenon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In the embodiment of the present invention, a corrosion and scale inhibitor for oilfields is composed of the following raw materials in parts by weight: 30 parts of cotton shells, 7 parts of tributyl citrate, 0.5 parts of melamine cyanurate, and 1 part of silicone powder. Parts, 18 parts of glycerin.

[0018] Tributyl citrate is mixed with ethanol with 5 times its mass to obtain a tributyl citrate solution; glycerol is mixed with deionized water with 3 times its mass to obtain a glycerin solution. Crush the cotton husks, pass through a 100-mesh sieve, add tributyl citrate solution, seal and stir at 80°C for 10 minutes, then microwave for 5 minutes with a microwave power of 800W; then add melamine cyanurate and glycerine Alcohol solution; stir at 95°C for 8 minutes, then ultrasonicate at 62°C for 20 minutes, ultrasonic power is 700W, then add silicone powder, and stir at 150°C for 72 minutes, then 450°C Calcined for 2 hours at a certain temperature to obtain the corrosi...

Embodiment 2

[0020] In the embodiment of the present invention, a corrosion and scale inhibitor for oilfields is composed of the following raw materials in parts by weight: 40 parts of cotton shells, 15 parts of tributyl citrate, 3 parts of melamine cyanurate, and 5 parts of silicone powder Parts, 26 parts of glycerin.

[0021] Tributyl citrate is mixed with ethanol with 5 times its mass to obtain a tributyl citrate solution; glycerol is mixed with deionized water with 3 times its mass to obtain a glycerin solution. Crush the cotton husks, pass through a 100-mesh sieve, add tributyl citrate solution, seal and stir at 80°C for 10 minutes, then microwave for 5 minutes with a microwave power of 800W; then add melamine cyanurate and glycerin Alcohol solution; stir at 95°C for 10 minutes, then ultrasonicate at 62°C for 20 minutes, ultrasonic power is 700W, then add silicone powder, and stir at 150°C for 72 minutes, then 450°C Calcined for 2 hours at a certain temperature to obtain the corrosio...

Embodiment 3

[0023] In the embodiment of the present invention, a corrosion and scale inhibitor for oilfields is composed of the following raw materials in parts by weight: 32 parts of cotton shells, 9 parts of tributyl citrate, 1 part of melamine cyanurate, and 2 parts of silicone powder part, 20 parts of glycerin.

[0024] Tributyl citrate is mixed with ethanol with 5 times its mass to obtain a tributyl citrate solution; glycerol is mixed with deionized water with 3 times its mass to obtain a glycerin solution. Crush the cotton husks, pass through a 100-mesh sieve, add tributyl citrate solution, seal and stir at 80°C for 10 minutes, then microwave for 5 minutes with a microwave power of 800W; then add melamine cyanurate and glycerine Alcohol solution; stir at 95°C for 9 minutes, then ultrasonicate at 62°C for 20 minutes, ultrasonic power is 700W, then add silicone powder, and stir at 150°C for 72 minutes, then 450°C Calcined for 2 hours at a certain temperature to obtain the corrosion a...

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Abstract

The invention discloses a corrosion and scale inhibitor for an oil field as well as a preparation method and application of the corrosion and scale inhibitor. The corrosion and scale inhibitor is prepared from the following raw materials in parts by weight: 30-40 parts of cotton hulls, 7-15 parts of tributyl citrate, 0.5-3 parts of melamine cyanurate, 1-5 parts of silicone powder and 18-26 parts of glycerol. The preparation method comprises the following steps: smashing the cotton hulls, adding tributyl citrate solution, heating and stirring, and carrying out microwave treatment; then adding melamine cyanurate and glycerol solution, heating and stirring, and carrying out ultrasonic treatment; and then adding silicone powder, heating and stirring, and carrying out high-temperature calcining, so as to obtain the corrosion and scale inhibitor. The corrosion and scale inhibitor disclosed by the invention has the advantages that the scale inhibition rate can reach up to more than 99% when petroleum produced water serves as reinjection water; and corrosion inhibition rate can reach more than 90%; the preparation method is simple and feasible, conditions are mild, the source of raw materials is wide, and extremely few raw materials are adopted, so that the preparation method can be widely popularized and applied; and the corrosion and scale inhibitor disclosed by the invention has good dispersibility, does not aggregate and is shelf-stable, and the shelf life can reach three years after compounding is completed.

Description

technical field [0001] The invention relates to the technical field of oilfield additives, in particular to a corrosion and scale inhibitor for oilfields and a preparation method and application thereof. Background technique [0002] At present, with the continuous development of my country's oilfield exploitation, most oilfields use water flooding to increase oil and gas production due to the decline in oil and gas production in the middle and late production periods of oilfields. While mining, many chemical additives are used to make oilfield mining more convenient. At the same time, the disadvantages are: due to the continuous use of additives, the components in the produced water are extremely complex, which makes the treatment of sewage more difficult. [0003] Generally, the produced water in oilfields will be used for reinjection after subsequent treatment procedures. If the treatment of the produced water is not in place, the produced water will be reinjected and ut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12C02F5/10C02F103/10
CPCC02F5/12C02F5/10C02F2103/10C02F2303/08
Inventor 林少忠
Owner 林少忠
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