Comb shaped antisalt polymer thickening agent

A polymer and thickener technology, applied in drilling equipment, etc., can solve problems such as lack of viscosity, waste of oilfield produced water, low viscosity of polymer solution, etc.

Inactive Publication Date: 2003-04-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, due to the high salinity of oilfield produced water, the prepared polymer solution has low viscosity and is unstable, and economical viscosity cannot be obtained. A large amount of oilfield produced water cannot be used and is wasted.

Method used

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  • Comb shaped antisalt polymer thickening agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve 125 parts of 10-hydroxydecanoic acid in 150 parts of ethanol, add 50 parts of allyl chloride, heat to reflux and dropwise add a concentrated solution of caustic soda, distill off ethanol and water to obtain the monomer (B) of the present invention.

[0022]Preparation of comb-shaped salt-resistant polymer thickener:

Embodiment 2

[0024] In the water solution containing 15% acrylamide and 5% B monomer, deoxygenate with nitrogen for 30 minutes, add 0.2 azobisisonitrile initiator, and keep the temperature at 60 ° C for 14 hours to obtain a viscoelastic hydrogel product .It can be dried at 100°C for 8 hours through a kneader to obtain a solid product.

Embodiment 3

[0026] In an aqueous solution containing 9% acrylic acid amine, 6% acrylic acid, and 8% B monomer, adjust the pH to 8 with sodium hydroxide, deoxygenate with nitrogen for 30 minutes, add 0.1 ammonium persulfate and 0.1 diabolite, and keep the temperature at 40°C for 8 hours , to obtain viscoelastic hydrogel products.

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PUM

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Abstract

A salt-resistant pectinate polymer as thickening agent for controlling flowability for higher recovery rate of petroleum in oil field is prepared from monomers A and B through copolymerization. Its advantages are high water solubility and thickening power to water medium, and excellent salt resistance.

Description

Technical field [0001] The invention relates to a fluidity control agent for oil field enhanced recovery, in particular to a comb-shaped salt-resistant polymer thickener. Background technique [0002] Polyacrylamide has poor salt resistance and must be prepared with fresh water to obtain economical viscosity, and the viscosity of the polymer solution is relatively stable. Therefore, solving the salt resistance problem of polyacrylamide has become one of the research hotspots in the field of oilfield chemistry in the world. [0003] Since the 1950s, as one of the important components of enhanced oil recovery technology in oil fields, polymer flooding is to add polymers to the injection water to increase the viscosity of water and reduce the fluidity of water. Lower mobility ratio due to increased viscosity and reduced water phase permeability with some polymers, which increases volumetric sweep efficiency and reduces oil saturation in the swept zone, thus improving water fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
Inventor 罗健辉卜若颍白凤鸾刘玉章王平美杨静波李宇乡张颍
Owner PETROCHINA CO LTD
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