Chemical modification-based salt-resistant high-temperature-resistant resin filtrate reducer as well as preparation method and application thereof

A fluid loss reducer and chemical modification technology, used in resin type anti-salt anti-high temperature fluid loss reducer, petroleum industry, can solve the problems of poor biodegradability, application limitation, poor degradability, etc., to achieve environmental performance Excellent, cost-effective, easily biodegradable effect

Pending Publication Date: 2022-01-14
中石化石油工程技术服务有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, with the severe environmental protection situation, the product has problems such as poor degradability
Although the SMP product itself is non-toxic, its biodegradability is poor. In some areas with relatively high environmental protection requirements, the application of SMP has been limited.

Method used

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  • Chemical modification-based salt-resistant high-temperature-resistant resin filtrate reducer as well as preparation method and application thereof
  • Chemical modification-based salt-resistant high-temperature-resistant resin filtrate reducer as well as preparation method and application thereof
  • Chemical modification-based salt-resistant high-temperature-resistant resin filtrate reducer as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0021] The invention provides a method for preparing a resin-based anti-salt and high-temperature fluid loss reducer based on chemical modification, comprising the following steps:

[0022] S1. Polymerizing p-aminobenzenesulfonic acid, phenol and paraformaldehyde to obtain an oligomerization product;

[0023] S2, reacting the enzymatically hydrolyzed lignin with bisulfite and the oligomerization product in an alkaline environment to obtain a resinous salt-resistant and high-temperature fluid loss reducer.

[0024] Focusing on the development direction of green chemicals and green synthesis, the present invention prepares a temperature-resistant, salt-resistant, biodegradable resin fluid loss control agent through molecular design, which is beneficial for application.

[0025] The present invention uses chemical modification to prepare anti-salt and high-temperature fluid loss reducer products. The product is mainly prepared from the following raw materials: p-aminobenzenesulfo...

Embodiment 1

[0048] The anti-salt and anti-high temperature fluid loss reducer described in this embodiment is made of the following raw materials in parts by mass:

[0049] 100 parts of water, 20 parts of p-aminobenzenesulfonic acid, 30 parts of enzymatic lignin, 20 parts of phenol, 15 parts of paraformaldehyde, 4.5 parts of anhydrous sodium bisulfite, 1.5 parts of sodium carbonate.

[0050] The preparation method comprises the following process steps:

[0051] Add 100 parts of clean water into the reaction kettle, and under stirring, add p-aminobenzenesulfonic acid, phenol, and paraformaldehyde in sequence according to the above mass ratio, and slowly heat to 60°C for reaction. The reaction time is 2 hours, and sodium carbonate is added to adjust the pH. When the value reaches 10, add enzymatic lignin and anhydrous sodium bisulfite to continue the reaction for 2 hours, then raise the temperature to 95°C, and continue the reaction for 4 hours to obtain a viscous liquid. Finally, the visco...

Embodiment 2

[0054] The anti-salt and anti-high temperature fluid loss reducer described in this embodiment is made of the following raw materials in parts by mass:

[0055] 110 parts of water, 35 parts of p-aminobenzenesulfonic acid, 40 parts of enzymatic lignin, 30 parts of phenol, 20 parts of paraformaldehyde, 5.0 parts of anhydrous sodium bisulfite, 2.0 parts of sodium carbonate;

[0056] The preparation method comprises the following process steps:

[0057] Add 110 parts of clear water into the reaction kettle, and under stirring, add p-aminobenzenesulfonic acid, phenol, and paraformaldehyde in sequence according to the above mass ratio, and slowly heat to 65°C for reaction. The reaction time is 1.5h, and sodium carbonate is added to adjust When the pH value reaches 10, add enzymatic lignin and anhydrous sodium bisulfite to continue the reaction for 1.5 hours, then raise the temperature to 100°C, continue the reaction for 3.5 hours to obtain a viscous liquid, and finally dry the visco...

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Abstract

The invention belongs to the technical field of well drilling treatment agents for oilfield exploitation, and provides a chemical modification-based salt-resistant high-temperature-resistant resin filtrate reducer and a preparation method and application thereof. The preparation method comprises the following steps: S1, subjecting p-aminobenzene sulfonic acid, phenol and paraformaldehyde to a polymerization reaction to obtain an oligomerization product; and S2, carrying out a reaction on enzymatic hydrolysis lignin, hydrosulphite and the oligomerization product in an alkaline environment to obtain the salt-resistant high-temperature-resistant resin filtrate reducer. According to the invention, phenolic resin molecules are chemically modified by adopting sulfanilic acid, enzymatic hydrolysis lignin and the like, hydration groups such as adsorption groups and sulfonic acid groups in molecules are increased, and the salt resistance and temperature resistance of the phenolic resin filtrate reducer can be effectively improved. Moreover, synthesis raw materials used in the invention are green, wide in source and high in cost performance, and the obtained product has good biodegradability and excellent environmental protection performance.

Description

technical field [0001] The invention belongs to the technical field of petroleum industry, in particular oilfield drilling treatment agents, and in particular relates to a chemically modified resin-based anti-salt and high-temperature fluid loss reducer, its preparation method and application. Background technique [0002] Drilling fluid plays a vital role in the drilling operation of oil and gas exploration and development, especially as the exploitation of oil and gas resources gradually develops into deep and ultra-deep layers, the formations encountered are becoming more and more complex, and oil drilling The difficulty also increases correspondingly, and higher requirements are put forward for the performance of drilling fluid such as temperature resistance and salt resistance. Drilling fluid is mainly composed of base slurry and various treatment agents, including fluid loss control agents, pH regulators, etc. Proper control of fluid loss through fluid loss control age...

Claims

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Application Information

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IPC IPC(8): C08G14/12C08G14/073C09K8/035C09K8/24
CPCC08G14/12C08G14/06C09K8/035C09K8/24
Inventor 位华单海霞周启成周亚贤詹适新杨晨涛
Owner 中石化石油工程技术服务有限公司
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