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Densifier for aqueous breakdown fluid and its production method

A water-based fracturing and thickening agent technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of high sand carrying capacity, poor salt resistance, good shear resistance, etc., and achieve high carrying capacity Sand and residue-free, good shearing and sand-carrying performance, and good sand-carrying performance

Inactive Publication Date: 2007-07-11
北京希涛技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of these substances as thickeners are: high water insoluble content, easy to cause reservoir damage
Generally synthetic polymers (polyacrylamide, methylene polyacrylamide) can change the properties of the polymer by controlling the synthesis conditions, meet the construction needs, and have good drag-reducing performance. The problem with the above two polymers is that they have poor shear resistance. ;Poor salt resistance;Residual glue adsorption and clogging are serious
But there has been no polymer thickener with good shear resistance and high sand-carrying property

Method used

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  • Densifier for aqueous breakdown fluid and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The weight percent of each monomer and water: AM: AMPS: BNS: AAM: AN: DMC: PVN: H 2 O=15:25:5:1.5:0.5:2:0.5:50.5.

[0046] Preparation of the solution: add 370g of distilled water into a 2000ml beaker, add 250g of AMPS monomer, 50g of BNS monomer, stir and dissolve for 20 minutes, slowly add neutralizer (sodium hydroxide) under stirring condition until the pH is neutral. Then add 150 g of 98% acrylamide, 15 g of AAM monomer, 5 g of AN monomer, 20 g of 80% concentration DMC monomer, and 5 g of PVN monomer, and stir to dissolve for 30 minutes.

[0047] Adjustment of the solution: adjust the pH value to 10±0.5, and adjust the temperature to 10±1°C.

[0048] Polymerization of the solution: Blow nitrogen to deoxygenate for 15-20 minutes, add catalysts AZDN0.5g / L, V500.05g / L, ammonium persulfate 0.03g / L, sodium formaldehyde sulfoxylate 0.03g / L in sequence under nitrogen protection , stop blowing nitrogen, and trigger for 15-20 minutes. When the temperature rises to 30°C, pu...

Embodiment 2

[0051] The weight percent of each monomer in water: AM: AMPS: BNS: AAM: AN: DMC: PVN: H 2 O=30:25:0.5:0:0.3:0:0:44.2.

[0052] Preparation of the solution: add 442g of distilled water into a 2000ml beaker, add 250g of AMPS monomer, 5g of BNS monomer, stir and dissolve for 20 minutes, slowly add neutralizer (sodium hydroxide) under stirring condition until the pH is neutral. Then add 300 g of 98% acrylamide, 0 g of AAM monomer, 0.3 g of AN monomer, 0 g of 80% concentration DMC monomer, and 0 g of PVN monomer, and stir to dissolve for 30 minutes.

[0053] Adjustment of the solution: adjust the pH value to 10±0.5, and adjust the temperature to 10±1°C.

[0054] Polymerization of the solution: Blow nitrogen to deoxygenate for 15-20 minutes, add catalysts AZDN0.5g / L, V500.04g / L, ammonium persulfate 0.03g / L, sodium formaldehyde sulfoxylate 0.03g / L in sequence under nitrogen protection , stop blowing nitrogen, and trigger for 15-20 minutes. When the temperature rises to 30°C, put it i...

Embodiment 3

[0057] The weight percent of each monomer and water: AM: AMPS: BNS: AAM: AN: DMC: PVN: H 2 O=30:7:6.5:0:2:0:0:54.5.

[0058] Preparation of the solution: Add 545g of distilled water into a 2000ml beaker, add 70g of AMPS monomer, 65g of BNS monomer, stir and dissolve for 20 minutes, and slowly add neutralizer (sodium hydroxide) under stirring condition until the pH is neutral. Then add 300 g of 98% acrylamide, 0 g of AAM monomer, 20 g of AN monomer, 0 g of 80% concentration DMC monomer, and 0 g of PVN monomer, and stir to dissolve for 30 minutes.

[0059] Adjustment of the solution: adjust the pH value to 10±0.5, and adjust the temperature to 10±1°C.

[0060] Polymerization of the solution: Blow nitrogen to deoxygenate for 15-20 minutes, add catalysts AZDN 0.8g / L, V50 0.08g / L, ammonium persulfate 0.04g / L, sodium formaldehyde sulfoxylate 0.04g / L in sequence under nitrogen protection , stop blowing nitrogen, and trigger for 15-20 minutes. When the temperature rises to 30°C, put...

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PUM

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Abstract

The invention discloses a thickener of water-based breakdown fluid, which is polymerized by acrylamide monomer and other olefin monomer through interval method, wherein the interval method puts allocated monomer into reacting container, which is heat to polymerize through catalyzing, heating by microwave and irradiating by ultraviolet.

Description

technical field [0001] The invention relates to a thickener for water-based fracturing fluid, especially a polyacrylamide polymer thickener, and a production method of the thickener. Background technique [0002] Fracturing is a conventional stimulation technique. Its purpose is to press the reservoir out of the fracture, thereby increasing production. The fracturing fluid used in fracturing must have the characteristics of high viscosity, high shear resistance, high sand-carrying strength, and environmental protection without residue after breaking the gel. High viscosity can make cracks, and only high viscosity can make the cracks reach the required width and depth. As the main agent of water-based fracturing fluid, the thickener is used to increase the viscosity of the fracturing fluid, reduce the fluid loss of the fracturing fluid, suspend and carry the proppant. [0003] The currently used thickener raw materials include vegetable gum and its derivatives, cellulose d...

Claims

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Application Information

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IPC IPC(8): C09K8/88
Inventor 郝春玲周万富李红
Owner 北京希涛技术开发有限公司
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