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A kind of starch-based scale inhibitor and its preparation method and application

A kind of antiscalant and starch-based technology, which is applied in the field of starch-based antiscalant and its preparation, can solve the problems of poor antiscaling effect and achieve good circulation, broad application prospects and low cost

Active Publication Date: 2022-06-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in view of the scaling problem in the oilfield system, the current antiscalants are difficult to take into account the high temperature, high hardness, and high salinity of oilfield water, and the scale inhibition effect on calcium scale, magnesium scale, barium strontium scale, etc. is poor

Method used

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  • A kind of starch-based scale inhibitor and its preparation method and application
  • A kind of starch-based scale inhibitor and its preparation method and application
  • A kind of starch-based scale inhibitor and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method of the starch-based scale inhibitor of the present embodiment, the steps are specifically:

[0028] 1. Material preparation

[0029] Calculated by producing 1000 mass parts of antiscalants, the amount of each ingredient (mass parts) is as follows:

[0030]

[0031] According to the above-mentioned preparation amount, the cornstarch is dissolved in part of the water (the part of the water is 70% of the total water), beating, and the cornstarch solution is made for subsequent use;

[0032] Acrylic acid is dissolved in a part of water according to the above-mentioned preparation amount to prepare an acrylic acid solution for subsequent use;

[0033] The maleic acid is dissolved in part of the water according to the above-mentioned preparation amount, and the maleic acid solution is made for subsequent use;

[0034] Dissolve ammonium persulfate and urea in part of the water according to the above-mentioned preparation amount to prepare a composit...

Embodiment 2

[0039] The preparation method of the starch-based scale inhibitor of the present embodiment, the steps are specifically:

[0040] 1. Material preparation

[0041] Calculated by producing 1000 mass parts of antiscalants, the amount of each ingredient (mass parts) is as follows:

[0042]

[0043] The carboxymethyl starch is dissolved in part of the water (the part of the water is 70% of the total water) according to the above-mentioned preparation amount, and beating is made to make a carboxymethyl starch solution for subsequent use;

[0044] Acrylamide is dissolved in part of the water according to the above-mentioned preparation amount to prepare an acrylamide solution for subsequent use;

[0045] The maleic acid is dissolved in part of the water according to the above-mentioned preparation amount, and the maleic acid solution is made for subsequent use;

[0046] Ammonium persulfate and thiourea are dissolved in part of the water according to the above-mentioned preparati...

Embodiment 3

[0051] The preparation method of the starch-based scale inhibitor of the present embodiment, the steps are specifically:

[0052] 1. Material preparation

[0053] Calculated by producing 1000 mass parts of antiscalants, the amount of each ingredient (mass parts) is as follows:

[0054]

[0055]

[0056] According to the above-mentioned preparation amount, the cornstarch is dissolved in part of the water (the part of the water is 70% of the total water), beating, and the cornstarch solution is made for subsequent use;

[0057] Acrylic acid is dissolved in a part of water according to the above-mentioned preparation amount to prepare an acrylic acid solution for subsequent use;

[0058] The maleic acid is dissolved in part of the water according to the above-mentioned preparation amount, and the maleic acid solution is made for subsequent use;

[0059] Dissolve ammonium persulfate and urea in part of the water according to the above-mentioned preparation amount to prepar...

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Abstract

The invention provides a starch-based scale inhibitor as well as its preparation method and application. In the preparation method of the starch-based scale inhibitor of the present invention, in the presence of a composite initiator, the starch is polymerized with the first monomer and the second monomer; wherein, the composite initiator includes ammonium sulfate and a reducing agent, and the first monomer The monomer is acrylic acid or acrylamide, and the second monomer is maleic acid. The starch-based antiscaling agent of the invention has good antiscaling effect on oil field water with high temperature, high hardness and high salinity.

Description

technical field [0001] The invention relates to a scale inhibitor, in particular to a starch-based scale inhibitor and a preparation method and application thereof. Background technique [0002] With the increase of oilfield produced water, oilfield water scaling is an unavoidable problem in oilfield production. Scaling is very harmful to oilfields. Scale deposits in oil production, gathering and transportation systems will not only increase fluid flow resistance, thereby increasing energy consumption, but also cause corrosion under the scale, affecting normal production. It will cause problems such as pore blockage. Therefore, scaling is becoming an urgent problem to be solved in oilfields. [0003] There are various factors that cause scaling in oilfield systems, including scaling caused by incompatibility between produced fluid and reinjection water, and scaling caused by different solubility of scaling ions due to differences in temperature and pressure between the sub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08F220/06C08F220/56C08F222/02C02F5/12C02F103/10
CPCC08F251/00C02F5/125C02F2103/10C08F220/06C08F220/56C08F222/02
Inventor 黎真周理志白晓飞梁凌熏闫峰何强宋文文陈德飞熊新民钟诚谢英王鹏陈庆国王方智
Owner PETROCHINA CO LTD
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