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Hydrophobic monomer, plugging gel and preparation method thereof

A hydrophobic monomer and gel technology, applied in the field of petroleum additives, can solve the problems of cement slurry being easily diluted, leakage and failure

Active Publication Date: 2018-12-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fly in the ointment is that in formations with more fluids, the cement slurry is easily diluted and washed away before forming a solid cement stone, resulting in leakage failure

Method used

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  • Hydrophobic monomer, plugging gel and preparation method thereof
  • Hydrophobic monomer, plugging gel and preparation method thereof
  • Hydrophobic monomer, plugging gel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The synthesis of embodiment 1 hydrophobic monomer:

[0050] Add 600mL of 1,4-dioxane and 45.42g of 4-tridecafluorooctylbenzyl alcohol into a dry three-neck flask with a stirrer, condenser and dropping funnel, and stir until 4-tridecafluorooctylbenzyl alcohol Alcohol is fully dissolved. The water bath was heated to a temperature of 65°C, and vacuum was applied for 2 hours to remove moisture. Under nitrogen protection, 0.013 g of dibutyltin dilaurate was added. 16.29 g of methacryloyloxyethyl isocyanate in the dropping funnel was dropped into a three-necked flask, reacted for 8.0 hours, and distilled under reduced pressure to remove acetone, and the crude product of the target molecule was obtained. The crude product was rinsed with chloroform for 3 times, placed in an oven at 65°C until constant weight, and the target product was obtained.

Embodiment 2

[0052] Preparation of hydrophilic polymer solution: Add 100g of polyvinyl alcohol with a degree of polymerization of 2450 and 900mL of water into the reactor, heat in a water bath to 100°C, stir under nitrogen protection until the polyvinyl alcohol is fully dissolved, cool to 85°C, add 0.5 K 2 S 2 o 8 And 80.0g of acrylate-2-hydroxyethyl ester, reacted for 2.0 hours.

[0053] Preparation of pre-reaction solution: Add 28.43g of acrylamide, 28.82g of acrylic acid, 41.44g of 2-acrylamido-2-methylpropanesulfonic acid, 3.08g of N,N-methylenebisacrylamide, 6.22g of The hydrophobic monomer prepared in Example 1 and 43.20g sodium octadecylsulfonate, then add a NaOH solution with a mass percentage concentration of 50.0% to adjust the pH of the solution to 8.0, stir until the water-soluble monomer is completely dissolved, and the hydrophobic monomer is solubilized In sodium octadecylsulfonate micelles.

[0054] Mix the hydrophilic polymer solution with the pre-reaction solution, add...

Embodiment 3

[0056] Preparation of hydrophilic polymer solution: Add 80g of polyvinyl alcohol with a degree of polymerization of 1750 and 920mL of water into the reactor, heat in a water bath to 100°C, stir under nitrogen protection until the polyvinyl alcohol is fully dissolved, cool to 70°C, add 0.32 g(NH 4 ) 2 S 2 o 8 And 80.0g sodium acrylate, reacted for 1.75 hours.

[0057] Preparation of pre-reaction solution: Add 33.95g of N-isopropylacrylamide, 17.22g of methacrylic acid, 22.73g of 2-acrylamido-2-methylpropanesulfonic acid, 2.0g of ethylene glycol dimethyl to 916.63mL of water in sequence acrylate, 7.43g of the hydrophobic monomer prepared in Example 1 and 41.665g of sodium dodecylsulfonate, and then add a 50.0% NaOH solution to adjust the pH of the solution to 8.5, and stir until the water-soluble monomer is completely Solubilized, hydrophobic monomers are solubilized in sodium lauryl sulfate micelles.

[0058] Mix the hydrophilic polymer solution with the pre-reaction solut...

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Abstract

The invention provides a hydrophobic monomer shown in a formula I, wherein R1 is selected from hydrogen, C1-C10 linear alkyl, C3-C10 branched alkyl or C3-C10 cycloalkyl, preferably is hydrogen or C1-C5 linear alkyl, and more preferably is methyl, ethyl or n-propyl; and m is an integer from 1 to 10, and preferably is 1, 2, 3, 4, 5 or 6; n is an integer from 0 to 6, and preferably is 0 or 1; k is an integer from 0 to 10, and preferably is 1, 2, 3, 5, 6 or 7; and h is an integer from 1 to 10, and preferably is 1, 2, 3, 5, 6 or 7. The invention also provides a preparation method for the hydrophobic monomer. In addition, the invention further provides a plugging gel and a preparation method thereof. The plugging gel provided by the invention has short gelation time, high viscosity, and a good shear thinning property, and satisfies plugging construction requirements.

Description

technical field [0001] The invention belongs to the field of petroleum additives, and in particular relates to a hydrophobic monomer, plugging gel and a preparation method thereof. Background technique [0002] Lost circulation is a complex downhole situation in which various working fluids flow into the formation under the action of pressure difference during downhole operations such as drilling, cementing, completion, logging or workover. For drilling engineering, lost circulation refers to the phenomenon that drilling fluid leaks into the formation during the drilling process. Once lost circulation occurs, it will not only delay the construction period, lose drilling fluid, damage the reservoir, interfere with mud logging, but may also cause a series of accidents such as well wall instability, well collapse, pipe sticking, blowout, etc., and even lead to the scrapping of the wellbore, resulting in significant economic loss. [0003] Among all kinds of leakage, the malig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C271/16C07C269/02C09K8/44
CPCC07C269/02C07C271/16C09K8/426C09K8/44
Inventor 褚奇王显光金军斌王治法杨枝李胜高书阳李舟军
Owner CHINA PETROLEUM & CHEM CORP
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