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Film-forming plugging polyamine for drilling fluid, preparation method of film-forming plugging polyamine and drilling fluid

A drilling fluid and film-forming technology, which is applied in the field of drilling fluids, can solve the problems of incapability of simultaneous inhibition performance, film-forming plugging performance and compatibility performance, and achieves low energy consumption for catalytic reaction, good compatibility, and good film-forming sealing performance. The effect of blocking

Pending Publication Date: 2021-10-22
CHINA PETROCHEMICAL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the inhibitory performance, film-forming plugging performance and compatibility performance of the previous products cannot be achieved at the same time.

Method used

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  • Film-forming plugging polyamine for drilling fluid, preparation method of film-forming plugging polyamine and drilling fluid
  • Film-forming plugging polyamine for drilling fluid, preparation method of film-forming plugging polyamine and drilling fluid
  • Film-forming plugging polyamine for drilling fluid, preparation method of film-forming plugging polyamine and drilling fluid

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preparation example Construction

[0031] The invention provides a method for preparing a film-forming blocking polyamine for drilling fluid, comprising:

[0032] Carrying out a polymerization reaction of acrylamide, acrylic acid, 2-acrylamido-2-methylpropanesulfonic acid, water and hydroxide under the action of an initiator to obtain a copolymer;

[0033] The copolymer is reacted under the action of an amination reagent and a catalyst to obtain a film-forming blocking polyamine for drilling fluid.

[0034] In the present invention, the hydroxide is preferably sodium hydroxide or potassium hydroxide.

[0035] In the present invention, the initiator is preferably selected from hydrogen peroxide, potassium permanganate, ammonium persulfate, azobisisobutyronitrile or ceric ammonium nitrate.

[0036] In the present invention, the amination reagent is preferably selected from ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine or pentaethylenehexamine.

[0037] In the present inventio...

Embodiment 1

[0051] Add 27g acrylamide, 28g acrylic acid, 12g 2-acrylamido-2-methylpropanesulfonic acid, 120g water and 16g sodium hydroxide into the polymerization reaction kettle, stir evenly at a stirring speed of 300r / min, and heat to 50°C, The pH value of the reaction solution was adjusted to 8 with a mass concentration of 40% sodium hydroxide aqueous solution, 0.5 g of hydrogen peroxide was added, and the polymerization reaction was carried out for 2 hours to obtain acrylamide / acrylic acid / 2-acrylamido-2-methylpropanesulfonic acid copolymer ;

[0052] Add 100 g of ethylenediamine to the above-mentioned acrylamide / acrylic acid / 2-acrylamido-2-methylpropanesulfonic acid copolymer, add 0.6 g of aluminum chloride, and react at a temperature of 130 ° C for 2 hours to obtain a light yellow transparent viscous The liquid is the film-forming blocking polyamine, and the product yield is 96.40%.

[0053] The product prepared in Example 1 of the present invention was subjected to structural det...

Embodiment 2

[0055] 27g of acrylamide, 30g of acrylic acid, 14g of 2-acrylamido-2-methylpropanesulfonic acid, 140g of water, and 17g of potassium hydroxide were added to the polymerization reactor, stirred evenly at a stirring speed of 500r / min, and heated to 60°C, The pH value of the reaction solution was adjusted to 9 with a mass concentration of 40% potassium hydroxide aqueous solution, 0.6 g of potassium permanganate was added, and the polymerization reaction was carried out for 3 hours to obtain acrylamide / acrylic acid / 2-acrylamido-2-methylpropanesulfonic acid copolymerization thing;

[0056] 110g of diethylenetriamine was added to the above acrylamide / acrylic acid / 2-acrylamido-2-methylpropanesulfonic acid copolymer, 0.8g of acetic acid was added, and the reaction was carried out at a temperature of 140 ° C for 3 hours to obtain a light yellow transparent viscous The liquid is the film-forming blocking polyamine, and the product yield is 96.89%.

[0057] The structure of the product ...

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Abstract

The invention provides film-forming plugging polyamine for a drilling fluid. The film-forming plugging polyamine comprises a compound with a structure as shown in a formula I. In the formula I, m is in a range of 1-20, n is in a range of 1-20, o is in a range of 1-10, p is in a range of 0-4, and M is Na or K. The film-forming plugging polyamine provided by the invention not only has good inhibition performance, but also has good plugging and filtrate reducing effects. In addition, the film-forming plugging polyamine has good compatibility in the drilling fluid. When the film-forming plugging polyamine provided by the invention is used in the drilling fluid, hydration expansion dispersion of clay minerals in a strong water-sensitive shale stratum can be effectively inhibit, and a film can be formed on a well wall for plugging so as to prevent a drilling fluid filtrate from entering the stratum. The film-forming plugging polyamine ensures the stability of the well wall of the drilling stratum which is easy to collapse when encountering strong water-sensitive shale through inhibition and plugging. The invention also provides the film-forming plugging polyamine for the drilling fluid, and the drilling fluid.

Description

technical field [0001] The invention belongs to the technical field of oilfield chemical drilling fluid treatment agents, and in particular relates to a film-forming plugging polyamine for drilling fluids, a preparation method thereof, and the drilling fluid. Background technique [0002] In the process of oil and gas drilling, polyamine products are the most powerful and widely used organic materials. Traditionally, quaternary ammonium products such as small cations, large cations, and amine-based polyethers are collectively referred to as polyamines. As early as the 1980s, quaternary amine products (small cations, large cations) were widely used in drilling fluids, but due to their high degree of cationization and poor compatibility with anionic treatment agents, the colloidal stability of the drilling fluid was destroyed and the filtration was The increase of the loss makes its application limited. In the late 1990s, amine-based polyethers were introduced into drilling ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/32C08F220/56C08F220/58C08F220/06C09K8/035C09K8/24
CPCC08F8/32C09K8/035C09K8/24C09K2208/12C08F220/56C08F220/585C08F220/06
Inventor 司西强王中华杨建军钟灵王忠瑾吕跃滨
Owner CHINA PETROCHEMICAL CORP
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