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Hydrophobic associated polymer modified magnetic nano-thickener and preparation method thereof

A hydrophobic association and polymer technology, applied in drilling compositions, chemical instruments and methods, and earthwork drilling, etc., can solve the problems of insufficient high temperature resistance and salt resistance, and reduce the difficulty of operation and production cost. The effect of shear resistance and fluid loss resistance

Inactive Publication Date: 2019-03-12
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the high temperature resistance and salt resistance of the commonly used polymer thickeners in China are still the main problems.

Method used

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  • Hydrophobic associated polymer modified magnetic nano-thickener and preparation method thereof
  • Hydrophobic associated polymer modified magnetic nano-thickener and preparation method thereof
  • Hydrophobic associated polymer modified magnetic nano-thickener and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 1. Nano Fe 3 o 4 Surface Oleic Acid Modification

[0030] At room temperature, 11.5g (49.7mmol) of nano Fe 3 o 4 Add 7.0g (24.8mmol) oleic acid into 100mL deionized water, mechanically stir (stirring rate 300rpm) for 90 minutes, then add ammonia water with a mass fraction of 25% to adjust the pH value to 10-11, continue mechanically stirring for 12 hours; the reaction is completed The final suspension was centrifuged (centrifugal speed 2000rpm) for 30 minutes, and the obtained precipitate was washed 3 times with a mixture of absolute ethanol and deionized water with a volume ratio of 1:1, and vacuum-dried at 60°C for 24 hours to obtain Oleic acid modified nano Fe 3 o 4 . The reaction yield was about 70%.

[0031] 2. Grafted AM / AMPS / styrene terpolymer

[0032] Dissolve 6.5g (91.4mmol) of acrylamide (AM) and 2.2g (10.6mmol) of 2-acrylamido-2-methylpropanesulfonic acid (AMPS) in 90mL of deionized water, and then oxidize it with hydrogen Sodium adjusts pH value to 8~...

Embodiment 2

[0041] 1. Nano Fe 3 o 4 Surface Undecylenic Acid Modification

[0042] At room temperature, 11.5g (49.7mmol) of nano Fe 3 o 4 and 2.8g (15.2mmol) undecylenic acid were added into 100mL deionized water, ultrasonicated for 15 minutes, then adding mass fraction of 25% ammonia water to adjust the pH value to 10-11, and continued ultrasonication for 3 hours; the suspension after the reaction was completed Centrifugal separation (centrifugal speed 2000rpm) for 30 minutes, the obtained precipitate was washed 3 times with a mixture of absolute ethanol and deionized water with a volume ratio of 1:1, and vacuum-dried at 60°C for 24 hours to obtain undecylenic acid modified Nano Fe 3 o 4 . The reaction yield was about 65%.

[0043] 2. Grafted AM / AMPS / acrylic n-octyl terpolymer

[0044] Dissolve 6.0g (84.4mmol) of acrylamide (AM) and 2.5g (12.1mmol) of 2-acrylamido-2-methylpropanesulfonic acid (AMPS) in 90mL of deionized water. Sodium adjusts the pH value to 8-9; then the mixed s...

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Abstract

The invention discloses a hydrophobic associated polymer modified magnetic nano-thickener and a preparation method thereof. The hydrophobic associated polymer modified magnetic nano-thickener is a core-shell structured nanocomposite prepared by taking nanometer Fe3O4 as the core, modifying the Fe3O4 through oleic surfactants and grafting an amphiphilic high-polymer compound, wherein the amphiphilic high-polymer compound is a hydrophobic associated water-soluble ternary polymer prepared by copolymerizing a water-soluble monomer, a heat-resistant and anti-salt monomer and a hydrophobic monomer,the water-soluble monomer is acrylamide, the heat-resistant and anti-salt monomer is 2-acrylamide-2-methylpropanesulfonic acid, and the hydrophobic monomer is styrene, n-octyl acrylate or octadecyl dimethyl allyl ammonium chloride. The hydrophobic associated polymer modified magnetic nano-thickener helps solve the problems of high cost and poor thickening performance of nano-thickeners and reutilization difficulty of polymer thickeners and is an efficient thickening and recycling integrated nano-thickener obtained by modifying low-toxicity magnetic nanometer materials and amphiphilic high-polymers; the preparation method of the hydrophobic associated polymer modified magnetic nano-thickener has no need for high-temperature and high-pressure reaction conditions and helps reduce the operation difficulty and the production cost.

Description

technical field [0001] The invention belongs to the technical field of oil field chemistry, and in particular relates to a thickening additive used in drilling fluid, fracturing fluid, oil displacement agent and other working fluids. Background technique [0002] In recent years, nanotechnology has been widely used in the fields of drilling and completion fluids, fracturing fluids, profile control and water plugging, enhanced oil recovery, and oilfield wastewater treatment in the oil and gas industry. Due to their unique rheological properties, temperature and salt resistance, and catalytic properties, nanomaterials, especially nanocomposites, have shown great potential in ultra-deep well drilling, high-temperature and high-pressure harsh environments, and complex reservoir development. [0003] Thickener is an important class of oilfield additives in oilfield chemicals, and it is one of the key additives that determine the performance and construction effect of drilling flu...

Claims

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Application Information

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IPC IPC(8): C09K8/035C09K8/588C09K8/68C09K8/80C08F292/00C08F220/56
CPCC08F292/00C09K8/035C09K8/588C09K8/68C09K8/80C09K8/882C08F220/56
Inventor 秦文龙姜关锋秦国伟李冉王洋杨江
Owner XI'AN PETROLEUM UNIVERSITY
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