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Cleaning and antiscaling agent and preparation method thereof

A technology of anti-scaling agent and plug-removing agent, which is applied in chemical instruments and methods, earthwork drilling, wellbore/well parts, etc. It can solve the problems of short action period and poor cleaning and anti-scaling effect, and achieve simple operation, And inhibit the upward pressure trend, easy to dissolve effect

Active Publication Date: 2019-06-14
宁夏朔光石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first purpose of the present invention is to provide a cleaning and anti-scaling agent to alleviate technical problems such as short action period and poor cleaning and anti-scaling effect in the prior art.

Method used

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  • Cleaning and antiscaling agent and preparation method thereof
  • Cleaning and antiscaling agent and preparation method thereof
  • Cleaning and antiscaling agent and preparation method thereof

Examples

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preparation example Construction

[0088] According to the second aspect of the present invention, the present invention provides a method for preparing an anti-scaling agent, which includes the following steps:

[0089] (a) Mix the deblocking agent, corrosion inhibitor, optional stabilizer and optional booster, and then add optional coating agent to coat;

[0090] (b) The product obtained in the step (a) is mixed with a slow-release agent and an optional enhancer, and then the optional initiator is added to mix after the temperature is raised to obtain a cleansing and antiscaling agent.

[0091] The preparation method of the anti-scaling agent provided by the invention has simple operation, low cost, low energy consumption and no pollution. The active ingredients of the prepared anti-scaling agent are uniformly dispersed, easy to dissolve, and have good slow-release effects. It has the properties of cleaning, anti-scaling, corrosion inhibition, clay anti-swelling and low interfacial tension, so as to increase the pre...

Embodiment 1

[0098] This embodiment provides a scale cleaning and anti-scaling agent, which includes the following raw material components in parts by weight: 18 parts of N-β-hydroxyethylethylenediaminetriacetic acid, 11 parts of diethylenetriaminepentaacetic acid, and 5 parts by weight of salicylic acid. Parts, 2 parts of N,N'-di-o-tolylthiourea, 1 part of potassium iodide, 1 part of potassium molybdate, 25 parts of polylactic acid, 5 parts of polyethylene glycol 20000 and 5 parts of stearic acid.

[0099] Among them, the weight ratio of N-β-hydroxyethylethylenediaminetriacetic acid, diethylenetriaminepentaacetic acid and salicylic acid in the plugging agent is 18:11:5. The weight ratio of tolylthiourea, potassium iodide and potassium molybdate is 2:1:1, and the weight ratio of polylactic acid and polyethylene glycol 20000 in the sustained-release agent is 25:5.

Embodiment 2

[0101] This embodiment provides a scale cleaning and anti-scaling agent, which includes the following raw material components in parts by weight: 12 parts of N-β-hydroxyethylethylenediaminetriacetic acid, 7 parts of diethylenetriaminepentaacetic acid, and 3 parts by weight. Parts, 2 parts of N,N'-di-o-tolylthiourea, 1.5 parts of potassium iodide, 1.5 parts of potassium molybdate, 22 parts of polylactic acid, 3 parts of polyethylene glycol 20000 and 3 parts of stearic acid.

[0102] Among them, the weight ratio of N-β-hydroxyethylethylenediaminetriacetic acid, diethylenetriaminepentaacetic acid and salicylic acid in the plugging agent is 12:7:3, and the N,N'-diortholine in the corrosion inhibitor The weight ratio of tolylthiourea, potassium iodide and potassium molybdate is 2:1.5:1.5, and the weight ratio of polylactic acid and polyethylene glycol 20000 in the sustained-release agent is 22:3.

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Abstract

The invention provides a scale removing and inhibiting agent, and a preparation method thereof, and relates to the technical field of oil field chemical additives. The scale removing and inhibiting agent comprises the following raw material components in parts by weight: 22-37 parts of a plugging removal agent, 3-5 parts of a corrosion inhibitor and 25-35 parts of a slow release agent. According to the scale removing and inhibiting agent provided by the invention, the plugging removal agent, the corrosion inhibitor and the slow release agent with a certain proportion are used as main raw materials, and the components are synergistically matched with each other, can be slowly dissolved when injected in water, and release effective components in a long-acting manner. Different types of scaleblockage objects can be removed, secondary scaling is inhibited, corrosion to tubular columns is relieved, and decompression and augmented injection of a high-pressure short-shot injection well are realized.

Description

Technical field [0001] The invention relates to the technical field of oilfield chemical additives, in particular to a scale cleaning and antiscaling agent and a preparation method thereof. Background technique [0002] In the production of low-permeability oilfield sandstone reservoirs, the natural energy of the formation decays quickly, and the formation energy supplement mainly comes from water injection. In the development and production of old oilfields, with the increase of water injection development years, the pressure of water injection wells has increased year by year; the physical properties of new exploration and development areas in the marginal areas have gradually deteriorated, and some water injection wells have shown high pressure in the early stage. Water injection is difficult in low-permeability sandstone reservoirs, and high water injection pressure is a common problem. Due to the prominent contradiction between injection and production, it directly affects ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/524C09K8/528C09K8/54
CPCC09K8/524C09K8/528C09K8/54C09K2208/12C09K2208/32
Inventor 陆育军周鑫张全文杨欢齐亚眀陆昕迪
Owner 宁夏朔光石油科技有限公司
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