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Carbon-based tackifier and its preparation method and application

A tackifier, carbon-based technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of affecting the blocking status, reducing the concentration, weak inorganic salt effect, etc., to achieve high blocking ability and stability. The effect of high stability, simple process and simple synthesis path

Active Publication Date: 2021-11-02
NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, although inorganic salt particles can play a relatively obvious plugging effect on small pores, the effect of inorganic salts on large pores and bad lost circulation is very weak, and even "false plugging" may occur, affecting the plugging effect. Judgment of the situation
Although the strength of the cement after curing is very high, the cement is easily diluted during the pouring process, resulting in a decrease in the concentration so that the ideal plugging effect cannot be obtained
Organic plugging agents, especially polymer gel plugging agents, are relatively cutting-edge emerging technologies, but the synthesis steps of organic plugging agents are relatively cumbersome, and most organic plugging agents are not resistant to high temperature and high salt oil field environment, so they are easy to failure during blocking

Method used

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  • Carbon-based tackifier and its preparation method and application
  • Carbon-based tackifier and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] (1) Preparation of dispersion II (A) containing carbon-based tackifier

[0065] (1) Take 1g of graphene oxide (GO) and disperse it in 1L of deionized water, and then use ultrasonic shearing (30kHz) to treat it for 2h to obtain GO nano-dispersion (particle size distribution is 50-300nm, average particle size is 200nm), That is, the dispersion liquid I containing graphene oxide;

[0066] (2) Weigh 0.2g of acrylamide, 0.002g of potassium persulfate and 0.05g of phenoxyethyl acrylate into 200ml of dispersion I in (1), and use magnetic stirring (350rpm / min, 10min) to make the three fully Dissolve and mix evenly to obtain a mixture;

[0067] (3) The mixture in (2) was transferred to a 500mL round bottom flask, and the beaker was filled with nitrogen and deoxygenated using an inflator, and then the round bottom flask was sealed with a rubber stopper;

[0068] (4) Under the conditions of magnetic stirring (350rpm) and constant temperature of 70°C, react the liquid in the roun...

Embodiment 2

[0077] The difference from Example 1 is that

[0078] (1) During the preparation process of dispersion II (A) containing carbon-based tackifier:

[0079] Replace "1g graphene oxide" with "0.5g graphene oxide";

[0080] Replace "0.2 g acrylamide and 0.002 g potassium persulfate and 0.05 g phenoxyethyl acrylate" with "0.1 g acrylamide and 0.0015 g potassium persulfate and 0.06 g phenoxyethyl acrylate";

[0081] Replace "under constant temperature conditions of 70°C, react the liquid in the round-bottom flask for 3 hours" with "under constant temperature conditions of 60°C, react the liquid in the round-bottom flask for 4 hours";

[0082] "The concentration of the carbon-based tackifier in the product dispersion is 1 mg / mL" is replaced by "the concentration of the carbon-based tackifier in the product dispersion is 0.5 mg / mL";

[0083] (2) During the preparation of the solution (B) containing hydrophobically associated polymers

[0084] Replace "the concentration of polyacryla...

Embodiment 3

[0089] The difference from Example 1 is that

[0090] (1) During the preparation process of dispersion II (A) containing carbon-based tackifier:

[0091] Replace "1g graphene oxide" with "2g graphene oxide";

[0092] Replace "0.2 g acrylamide and 0.002 g potassium persulfate and 0.05 g phenoxyethyl acrylate" with "0.3 g acrylamide and 0.003 g potassium persulfate and 0.04 g phenoxyethyl acrylate";

[0093] Replace "under constant temperature conditions of 70°C, react the liquid in the round bottom flask for 3h" with "under constant temperature conditions of 80°C, react the liquid in the round bottom flask for 2h";

[0094] "The concentration of the carbon-based tackifier in the product dispersion is 1 mg / mL" is replaced by "the concentration of the carbon-based tackifier in the product dispersion is 2 mg / mL";

[0095] (2) During the preparation of the solution (B) containing hydrophobically associated polymers

[0096] Replace "the concentration of polyacrylamide in the sol...

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Abstract

The application discloses a carbon-based tackifier as well as its preparation method and application. The carbon-based tackifier includes graphene oxide modified by a modifier; the modifier includes at least one of amide compounds, ester compounds, and aromatic compounds. The carbon-based viscosifier achieves a viscosifying effect on hydrophobic association polymers, and can realize effective plugging of oil wells in high-temperature and high-salt oilfield environments.

Description

technical field [0001] The application relates to a carbon-based tackifier and its preparation method and application, belonging to the technical field of petroleum exploitation. Background technique [0002] During oil drilling, lost circulation is a negative downhole phenomenon. Lost circulation will cause the drilling fluid to seep into the formation under the action of the pressure difference in the well, resulting in the loss of drilling fluid, and at the same time causing damage to the formation, affecting the production of oil and gas wells. [0003] Traditional plugging agents are represented by inorganic salts and cement. Inorganic salt particles with small particle size can enter into narrow borehole wall fractures to block the pores in advance, avoiding fracture expansion due to pressure difference changes in the subsequent drilling process, and more serious lost circulation. Due to its relatively obvious "hydraulicity", cement will gradually solidify during the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C09K8/42C01B32/198
CPCC09K8/035C09K8/426C01B32/198
Inventor 李意明亮张欢乐俞波王耀国
Owner NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST
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