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A kind of hyperbranched multi-arm polyacrylamide polymer and preparation method thereof

A technology of polyacrylamide and acrylamide monomers, which is applied in the field of hyperbranched multi-arm polyacrylamide polymers and their preparation, can solve the problems of affecting the effect of polymer flooding, unstable structure, decreased viscosity and the like, and achieves improved viscosity increase. And the effect of salt resistance, shear resistance enhancement, mild conditions

Active Publication Date: 2017-07-14
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since most of the modified products still have a straight-chain structure of polyacrylamide, under high-shear conditions, the structure is unstable and easily destroyed, resulting in a sharp drop in viscosity, which ultimately affects the effect of polymer flooding.

Method used

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  • A kind of hyperbranched multi-arm polyacrylamide polymer and preparation method thereof
  • A kind of hyperbranched multi-arm polyacrylamide polymer and preparation method thereof
  • A kind of hyperbranched multi-arm polyacrylamide polymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] 30mg HPG, 85mL H 2 O was placed in a three-necked flask, stirred and dissolved, and nitrogen gas was introduced to remove oxygen for 45 minutes, and then an aqueous solution of ammonium cerium nitrate (50 mg of ammonium cerium nitrate dissolved in 10 mL of water) was added under the protection of nitrogen, and the reaction was stirred at 40 ° C for 30 minutes. Slowly add acrylamide aqueous solution (8.0g acrylamide dissolved in 22mL water), sodium acrylate aqueous solution (2.0g sodium acrylate dissolved in 10mL water), acryloyl phosphorylcholine monomer aqueous solution (300mg acryloyl phosphorylcholine monomer dissolved in 3mL water), and then warmed up to 55°C for 6h. The obtained reaction solution was dried in an oven at 70°C to remove moisture, and the 1# hyperbranched multi-arm polyacrylamide polymer was obtained (the schematic diagram of which is shown in figure 1 shown).

Embodiment 2

[0058] 35mgHPG, 85mL H 2 O was placed in a three-necked flask, stirred and dissolved, and nitrogen gas was introduced to deoxygenate for 45 minutes, then an aqueous solution of ammonium cerium nitrate (60 mg of ammonium cerium nitrate dissolved in 10 mL of water) was added under the protection of nitrogen, and stirred for 30 minutes at 40 ° C. Slowly add acrylamide aqueous solution (8.0g acrylamide dissolved in 22mL water), sodium acrylate aqueous solution (2.0g sodium acrylate dissolved in 10mL water), acryloylcarboxylate choline monomer aqueous solution (300mg acryloylcarboxylate choline monomer in 3mL of water), and then warmed up to 55°C for 6h. The obtained reaction solution was dried in an oven at 70°C to remove moisture, and 2# hyperbranched multi-arm polyacrylamide polymer was obtained.

[0059] The polymer performance evaluation method provided by the present invention and the results are as follows, wherein the unmodified partially hydrolyzed polyacrylamide (i.e. "c...

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Abstract

The invention provides a hyperbranched multi-arm polyacrylamide polymer and a preparation method thereof. The hyperbranched multi-arm polyacrylamide polymer is formed by a spherical parent nucleus A of rich hydroxy-terminated glycidyl ether and branched arms B connected to the spherical parent nucleus A, each branched arm B is formed by a polyacrylamide chain segment, a sodium polyacrylate chain segment and a poly zwitterionic choline functional chain segment which are connected in sequence; the viscosity average molecular weight of the hyperbranched multi-arm polyacrylamide polymer is 3.5 to 10 millions, in the hyperbranched multi-arm polyacrylamide polymer, mass ratio of the spherical parent nucleus A to the polyacrylamide chain segment to the sodium polyacrylate chain segment to the poly zwitterionic choline functional chain segment is 1:200-300:50-70:5-10 in sequence. The application of the hyperbranched multi-arm polyacrylamide polymer in polymer oil displacement also belongs to the protection scope of the invention. The polymer has a three dimensional spherical multi-arm structure, and obviously enhanced tackifying, anti-salt and anti-shear capabilities.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a hyperbranched multi-arm polyacrylamide polymer and a preparation method thereof. Background technique [0002] Polymer flooding enhanced oil recovery technology is one of the important measures for oilfield sustainable development. The CAPtain Oilfield in the North Sea, the Sanand Oilfield in India, and Venezuela, Russia, and the United States have all successfully carried out polymer flooding. Domestic Daqing, Shengli, Henan, and Bohai Oilfields have also carried out large-scale applications, and have achieved significant water control growth. oil effect. Polymer flooding system is the core and basis of polymer flooding technology, and the most widely used one is partially hydrolyzed polyacrylamide polymer. With the deepening of oil field development, the reservoir environment of polymer flooding technology is also gradually changing from the first-class reservoi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/56C08F220/06C08F220/34C08F220/36C08F4/40C09K8/588
Inventor 陈文娟张健王洪唐恩高薛新生檀国荣
Owner CHINA NAT OFFSHORE OIL CORP