High-temperature-resistant salt-resistant anti-sloughing filtrate reducer and preparation method thereof

A filtrate reducer and high temperature resistance technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of difficulty in large-scale application, low yield of modification reaction, and different reaction characteristics, so as to achieve the goal of preventing Slump and inhibition of clay hydration dispersion, good clay hydration dispersion, and the effect of improving speed and efficiency

Active Publication Date: 2021-10-19
山东红锦石油技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lignin has a complex structure. Compared with other biomass macromolecules, lignin has no regular molecular structure. Due to the complex molecular structure and different reaction characteristics of lignin, it has brought difficulties to its large-scale application in the field of chemical synthesis.
Lignin itself is a high-molecular polymer with large molecular weight and low activity. It is directly used as a modification due to its own chemical reaction active sites, so that the yield of modification reaction is low, and the modified product has certain Excellent high temperature resistance, but due to the large molecular structure, its rheological energy is poor, and the salt resistance and anti-slump performance are also poor.

Method used

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  • High-temperature-resistant salt-resistant anti-sloughing filtrate reducer and preparation method thereof
  • High-temperature-resistant salt-resistant anti-sloughing filtrate reducer and preparation method thereof
  • High-temperature-resistant salt-resistant anti-sloughing filtrate reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] An anti-high temperature, anti-salt, anti-slump, and anti-slump fluid loss reducing agent is composed of the following raw materials: 6 parts by weight of lignin degradation liquid, 15 parts by weight of maleic anhydride, 9 parts by weight of sodium p-styrene sulfonate, dimethyl diallyl chloride 6 parts by weight of ammonium chloride, an appropriate amount of alkaline solution, 0.1 parts by weight of benzoyl peroxide (BPO), 0.02 parts by weight of dicumyl peroxide (DCP), and 0.06 parts by weight of potassium persulfate are prepared by chemical reaction.

[0043] The preparation method of the high-temperature, salt-resistant, anti-collapse and fluid loss reducer is as follows:

[0044] S1. Take lignin degradation solution, maleic anhydride, sodium p-styrene sulfonate, dimethyl diallyl ammonium chloride and add 700 parts by weight of water according to the above-mentioned amount, add an appropriate amount of alkaline solution to adjust the pH of the solution to 8, Obtain ...

Embodiment 2

[0051] An anti-high temperature, anti-salt, anti-slump and fluid loss reducing agent is composed of the following raw materials: 5 parts by weight of lignin degradation liquid, 12 parts by weight of maleic anhydride, 7 parts by weight of sodium p-styrene sulfonate, dimethyl diallyl chloride It is prepared by chemical reaction of 5 parts by weight of ammonium chloride, an appropriate amount of alkaline solution, 0.04 parts by weight of benzoyl peroxide (BPO), 0.01 parts by weight of dicumyl peroxide (DCP), and 0.05 parts by weight of potassium persulfate.

[0052] The preparation method of the high-temperature, salt-resistant, anti-collapse and fluid loss reducer is as follows:

[0053] S1. Take lignin degradation solution, maleic anhydride, sodium p-styrene sulfonate, dimethyl diallyl ammonium chloride and add 600 parts by weight of water according to the above-mentioned amount, add an appropriate amount of alkaline solution to adjust the pH of the solution to 8, Obtain mixtur...

Embodiment 3

[0060] An anti-high temperature, anti-salt, anti-slump, and anti-slump fluid loss reducing agent is composed of the following raw materials: 8 parts by weight of lignin degradation liquid, 18 parts by weight of maleic anhydride, 13 parts by weight of sodium p-styrene sulfonate, dimethyl diallyl chloride 10 parts by weight of ammonium chloride, an appropriate amount of alkaline solution, 0.17 parts by weight of benzoyl peroxide (BPO), 0.03 parts by weight of dicumyl peroxide (DCP), and 0.07 parts by weight of potassium persulfate are prepared by chemical reaction.

[0061] The preparation method of the high-temperature, salt-resistant, anti-collapse and fluid loss reducer is as follows:

[0062] S1. Take lignin degradation solution, maleic anhydride, sodium p-styrene sulfonate, dimethyl diallyl ammonium chloride and add 800 parts by weight of water according to the above-mentioned amount, add an appropriate amount of alkaline solution to adjust the pH of the solution to 9, Obta...

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Abstract

The invention relates to the technical field of filtrate reducers, in particular to a high-temperature-resistant salt-resistant anti-sloughing filtrate reducer and a preparation method thereof. The high-temperature-resistant salt-resistant anti-sloughing filtrate reducer is prepared by polymerizing lignin degradation liquid, maleic anhydride, sodium p-styrenesulfonate and dimethyl diallyl ammonium chloride under the action of an initiator and a cross-linking agent. The lignin degraded by the immobilized feruloyl esterase is small in molecular quantity, increased in active sites and prone to reaction with other monomers; and a compound obtained by polymerization is good in dissolving property, has good compatibility with other drilling fluid additives, and is outstanding in high temperature resistance, salt resistance and collapse resistance.

Description

technical field [0001] The invention belongs to the technical field of fluid loss control agents, and in particular relates to a high-temperature, salt-resistant, anti-collapse fluid loss control agent and a preparation method thereof. Background technique [0002] Fluid loss reducer is an additive that can ensure the stability of drilling fluid performance, reduce the loss of harmful liquid to geological formations, improve the stability of the well wall and ensure the regular diameter of oil wells. The use of fluid loss reducer can effectively ensure the safe production of oil fields. With the continuous increase of mining volume and the continuous improvement of exploration technology, more and more deep wells and ultra-deep wells appear, which put forward more and more requirements for drilling fluid and various additives used in drilling fluid, such as fluid loss control agent. High requirements, such as continuous high temperature resistance and salt resistance. And ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F289/00C08F222/06C08F212/14C08F226/02C09K8/035
CPCC08F289/00C09K8/035C09K2208/12C09K2208/34C08F222/06C08F212/30C08F226/02
Inventor 赵沿东蔡维良程跃凤郭淑华赵倩
Owner 山东红锦石油技术开发有限公司
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