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A kind of polymer with surface activity for oil displacement and its preparation method and application

A technology of surface activity and polymers, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems such as few reports, and achieve improved polymerization activity, excellent viscosity increase, temperature resistance and salt resistance, and emulsification performance Reduced effect

Active Publication Date: 2019-09-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, the research on surface active polymers for oil displacement is in the stage of laboratory development, and there are few related literature reports at home and abroad.

Method used

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  • A kind of polymer with surface activity for oil displacement and its preparation method and application
  • A kind of polymer with surface activity for oil displacement and its preparation method and application
  • A kind of polymer with surface activity for oil displacement and its preparation method and application

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Experimental program
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specific Embodiment approach

[0069] According to a preferred embodiment, the preparation method of the polymer for oil displacement with surface activity comprises the following steps:

[0070] Step 1: adding monomer D and monomer F into a polymerization reaction bottle to prepare an aqueous solution, and adjusting the pH value of the aqueous solution to 6-10 with alkali;

[0071] Step 2: Add monomer E, chelating agent, emulsifier and accelerator to the aqueous solution in step 1, and stir evenly to make it a stable micellar solution;

[0072] Step 3: At a temperature of 0-30°C, after bubbling nitrogen for 5-60 minutes, add the initiator to the micellar solution in step 2, and after bubbling nitrogen to make it evenly mixed, seal polymerization for 2-15 hours to obtain polymer colloid;

[0073] Step 4: Take out the polymer colloid, add alkaline substances after granulation, mix well, and perform hydrolysis at 50-120°C for 0.5-8 hours;

[0074] Step 5: Take out the colloid and then granulate, dry, pulver...

Embodiment 1

[0084] Embodiment 1: Preparation has surface active polymer for oil displacement

[0085] 1. Mix 17.0g of acrylamide (accounting for 85% by weight of the total amount of monomers), 2.0g of the hydrophilic monomer represented by formula (12) (m=6, n=2, accounting for 10% of the total amount of monomers) % by weight) was added to the thermal insulation polymerization reaction bottle (ie, the polymerization bottle), and 60.0 g of deionized water was added to dissolve to form an aqueous solution, and then sodium hydroxide was added to adjust the pH to 6.0;

[0086] 2. Add the hydrophobic monomer (p=9, accounting for 5% by weight of the total amount of monomers) shown in 1.0g of formula (11), 0.2g of sodium lauryl sulfate, 1% by weight of EDTA- 1.0 g of 2Na aqueous solution, 0.5 g of 1% by weight aqueous urea solution, 20.0 mg of pentamethyldiethylenetriamine, and fully stirred to obtain stable micelles;

[0087] 3. Control the temperature of the aqueous solution at 10° C., and th...

Embodiment 2

[0091] Embodiment 2: Preparation has surface active polymer for oil displacement

[0092] 1. 17.98g of acrylamide (accounting for 89.9% by weight of the total amount of monomers), 2.0g of the hydrophilic monomer represented by formula (12) (m=4, n=6, accounting for 10% of the total amount of monomers) % by weight) was added to the thermal insulation polymerization reaction bottle (ie, the polymerization bottle), and 60.0 g of deionized water was added to dissolve to form an aqueous solution, and then sodium hydroxide was added to adjust the pH to 7.0;

[0093] 2. Add the hydrophobic monomer shown in 0.02g of formula (11) (p=13, accounting for 0.1% by weight of the total amount of monomers), 0.1g of sodium lauryl sulfate, 1% by weight of EDTA- 1.0 g of 2Na aqueous solution, 0.5 g of 1% by weight aqueous urea solution, 40.0 mg of pentamethyldiethylenetriamine, and fully stirred to obtain stable micelles;

[0094] 3. Control the temperature of the aqueous solution at 5° C., and ...

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Abstract

The invention relates to the field of crude oil extraction, and discloses an oil displacing polymer with the surface activity and a preparing method and application thereof. The polymer comprises a structural unit A, a structural unit B and a structural unit C, wherein the structural unit A is a structural unit with the structure shown in the formula (1), the structural unit B is a structural unitwith the structure shown in the formula (2), and the structural unit C is a structural unit with the structure shown in the formula (3). According to the oil displacing polymer with the surface activity and the preparing method and application thereof, a hydrophobic monomer and a hydrophilic monomer are jointly introduced into a macromolecular chain of polyacrylamide to prepare a novel polymer with the surface activity, and the obtained novel polymer with the surface activity has the improved tackifying performance and emulsifying performance, the reduced surface and interfacial tension and the like. The formulas are defined in the description.

Description

technical field [0001] The invention relates to the field of crude oil recovery, in particular to a polymer for oil displacement with surface activity, a method for preparing a polymer for oil displacement with surface activity and a polymer for displacement with surface activity prepared by the method. Application of polymer for oil and polymer for oil displacement with surface activity as oil displacement agent. Background technique [0002] Functional polymers with certain surface activity are referred to as surface-active polymers for short. Surface-active polymers refer to a new type of polymer that has both hydrophilic groups and lipophilic groups in its polymer structure, making its aqueous solution have good surface activity. Functional polymers are generally obtained by aqueous solution copolymerization or micellar copolymerization, which is obtained by initiating the polymerization of comonomers under the action of a certain temperature and an initiator. [0003] ...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F222/38C08F220/54C08F2/26C09K8/584C09K8/588
Inventor 赵方园杨捷王晓春
Owner CHINA PETROLEUM & CHEM CORP
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