Hydrophobic membrane structure wall fixing agent as well as preparation method and application thereof

A technology of hydrophobic membrane and wall-fixing agent, applied in the field of petroleum drilling fluid, can solve the problems of limited hydrophobicity and salt-resistance ability of wall-fixing agent, reduce filtration loss, etc., so as to reduce hydration, enhance temperature resistance and performance. excellent effect

Pending Publication Date: 2022-05-10
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this wall-fixing agent can effectively reduce fluid loss, enhance the cementation force between rocks, and is environmentally friendly and has good biodegradability, the wall-fixing agent has limited hydrophobicity and salt resistance.

Method used

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  • Hydrophobic membrane structure wall fixing agent as well as preparation method and application thereof
  • Hydrophobic membrane structure wall fixing agent as well as preparation method and application thereof
  • Hydrophobic membrane structure wall fixing agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] This embodiment prepares a kind of hydrophobic membrane structure wall-fixing agent, comprises the following steps:

[0054] 1) Preparation of hydrophobically modified acrylamide:

[0055] Slowly add 10g of acrylamide and 36g of lauryl acrylate into a beaker containing 120mL of ethylene glycol, stir for 40min at a magnetic stirring speed of 400r / min, and then transfer to a three-necked flask equipped with a stirring and temperature measuring device , put the three-neck flask in a water bath, set the stirring speed to 400r / min, wait for the temperature to rise to 50°C, add 5g of 25wt% ammonium persulfate aqueous solution, raise the temperature to 70°C, and react at constant temperature and speed for 6h. After the reaction is completed Centrifuge, wash the solid with ethanol several times, place it in a vacuum drying oven at 92°C and dry it to constant weight, and grind it into a powder of no less than 150 mesh.

[0056] 2) Preparation of pre-fluid A:

[0057] Slowly ad...

Embodiment 2

[0063] This embodiment prepares a kind of hydrophobic membrane structure wall-fixing agent, comprises the following steps:

[0064] 1) Preparation of hydrophobically modified acrylamide:

[0065] Slowly add 10g of acrylamide and 36g of lauryl acrylate into a beaker containing 120mL of ethylene glycol, stir for 40min at a magnetic stirring speed of 400r / min, and then transfer to a three-necked flask equipped with a stirring and temperature measuring device , put the three-neck flask in a water bath, set the stirring speed to 400r / min, wait for the temperature to rise to 50°C, add 5g of 25wt% ammonium persulfate aqueous solution, raise the temperature to 70°C, and react at constant temperature and speed for 6h. After the reaction is completed Centrifuge, wash the solid with ethanol several times, place it in a vacuum drying oven at 92°C and dry it to constant weight, and grind it into a powder of no less than 150 mesh.

[0066] 2) Preparation of pre-fluid A:

[0067] Slowly ad...

Embodiment 3

[0073] This embodiment prepares a kind of hydrophobic membrane structure wall-fixing agent, comprises the following steps:

[0074] 1) Preparation of hydrophobically modified acrylamide:

[0075] Slowly add 10g of acrylamide and 36g of lauryl acrylate into a beaker containing 120mL of ethylene glycol, stir for 40min at a magnetic stirring speed of 400r / min, and then transfer to a three-necked flask equipped with a stirring and temperature measuring device , put the three-neck flask in a water bath, set the stirring speed to 400r / min, wait for the temperature to rise to 50°C, add 5g of 25wt% ammonium persulfate aqueous solution, raise the temperature to 70°C, and react at constant temperature and speed for 6h. After the reaction is completed Centrifuge, wash the solid with ethanol several times, place it in a vacuum drying oven at 92°C and dry it to constant weight, and grind it into a powder of no less than 150 mesh.

[0076] 2) Preparation of pre-fluid A:

[0077] Slowly ad...

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Abstract

The invention discloses a hydrophobic membrane structure wall fixing agent as well as a preparation method and application thereof. The wall fixing agent with the hydrophobic membrane structure is prepared by carrying out free radical polymerization on hydrophobic modified acrylamide, a high-temperature-resistant monomer and a cationic monomer under the action of a first initiator, the hydrophobic modified acrylamide is prepared by reacting acrylic acid long-chain alkyl ester with acrylamide; the high-temperature-resistant monomer is selected from one or a combination of more than two of sodium vinyl sulfonate, 2-acrylamido-2-methylpropanesulfonic acid, sodium p-styrenesulfonate, sodium allysulfonate and N-vinyl caprolactam; the cationic monomer is selected from one or a combination of more than two of 3-chloro-2-hydroxypropyl trimethyl ammonium chloride, dimethyl diallyl ammonium chloride and acryloyloxyethyl trimethyl ammonium chloride. The wall fixing agent disclosed by the invention has excellent temperature resistance and salt tolerance, and can form a hydrophobic membrane on the surface of rock, prevent water molecules from immersing, weaken the hydration effect and increase the strength of the rock.

Description

technical field [0001] The invention relates to the field of petroleum drilling fluids, in particular to a hydrophobic membrane structure wall-fixing agent and a preparation method and application thereof. Background technique [0002] At the current stage, deep water has become an important area for oil and gas exploration and development, and deep water water-based drilling fluid is one of the key technologies to effectively ensure deep water oil and gas exploration and development. The deep water area is far away from the coast, and the sediment carried by the wind, river water and sea water is finer and finer, and its deposition rate, compaction method and water content are obviously different from those on land, so it is highly active and undercompacted. Among them, under-compaction of the formation will lead to low fracture pressure of the formation. Therefore, during the drilling operation, the safe density window of the drilling fluid is narrowed, and it is easy for ...

Claims

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Application Information

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IPC IPC(8): C08F265/10C08F220/58C08F226/02C08F220/34C08F8/44C09K8/035
CPCC08F265/10C09K8/035C08F8/44C08F220/585C08F226/02C08F220/34
Inventor 王韧王建龙杨杰汪奇兵屈沅治刘路漫耿愿
Owner BC P INC CHINA NAT PETROLEUM CORP
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