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AM (acrylamide)/NaAA (sodium acrylic acid)/AMPL (N-allyl morpholinium) ternary copolymer oil displacement agent and synthesis method thereof

A terpolymer and terpolymer technology, applied in the direction of drilling compositions, chemical instruments and methods, to achieve the effects of high synthesis yield, easy operation, and high resistance to shear dilution

Inactive Publication Date: 2013-08-14
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional polymer oil displacement agent is mainly partially hydrolyzed polyacrylamide (HPAM). However, with the deepening of oil and gas field development and the increasing difficulty of reservoir development, the existing HPAM products have improved in shear stability and temperature resistance. The performance of salt and other aspects still needs to be improved

Method used

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  • AM (acrylamide)/NaAA (sodium acrylic acid)/AMPL (N-allyl morpholinium) ternary copolymer oil displacement agent and synthesis method thereof
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  • AM (acrylamide)/NaAA (sodium acrylic acid)/AMPL (N-allyl morpholinium) ternary copolymer oil displacement agent and synthesis method thereof

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Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: the synthesis of terpolymer P (AM / NaAA / AMPL)

[0028] Weigh a certain amount of hydrophobic monomer N-allylmorpholine (AMPL) and alkylphenol polyoxyethylene ether (OP-10) in a 250mL flask, add 50mL of distilled water and stir for 0.5-1h to the solution, transfer to a 250mL three-port in the flask. At room temperature, with the N 2 Add 50mL of distilled water to the three-necked flask of the tube and stirring device, and add a certain amount of acrylamide (AM) and acrylic acid (AA), and stir to dissolve them completely. Use NaOH solution to adjust the pH value of the polymerization system, and then add a certain amount of distilled water to adjust the concentration of the three monomers in the system. Constant temperature in the water bath, and pass N 2 After stirring for 30min, ammonium persulfate ((NH 4 ) 2 S 2 o 8 ) and sodium bisulfite (NaHSO 3). The constant temperature reaction was continued for 8h to obtain a polymer colloid. Cut the polyme...

Embodiment 2

[0029] Embodiment 2: P (AM / NaAA / AMPL) terpolymer structural characterization

[0030] The infrared spectrogram of the ternary polymer P (AM / NaAA / AMPL) synthesized by embodiment 1 is as follows figure 1 Shown: As can be seen from the figure, -NH 2 Stretching vibration peak at 3408cm -1 , the C=O stretching vibration peak is at 1666cm -1 at C-CH 2 -C antisymmetric stretching vibration peak at 2932cm -1 , the stretching vibration peak of C-O-C is at 1182cm -1 and 1120cm -1 , The absorption peak of -COO- is 1557cm -1 .

Embodiment 3

[0031] Embodiment 3: the determination of the optimal synthesis condition of terpolymer P (AM / NaAA / AMPL)

[0032] The main parameters affecting the apparent viscosity of the polymer solution are: initiator dosage, pH value, AMPL dosage, reaction temperature, AM / AA ratio and total monomer concentration. Optimum condition determination method is: the polymkeric substance obtained by embodiment 1 is configured into the polymkeric substance aqueous solution that polymkeric substance concentration is 1000mg / L with distilled water, measures solution apparent viscosity with Brookfield DV-Ⅲ rheometer, selects apparent The formula with higher viscosity is the better formula. The test conditions are: constant shear rate 7.34s -1 , Viscosity measurement temperature 25 ℃.

[0033] 1. Influence of initiator dosage on apparent viscosity of polymer solution

[0034] The present invention uses the redox system of ammonium persulfate-sodium bisulfite as the initiator. In the monomer ratio A...

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Abstract

The invention discloses a water-soluble polymer oil displacement agent and a synthesis method thereof. The synthesis method comprises the following steps of: placing hydrophobic monomers, namely N-allyl morpholinium (AMPL) and alkylphenol ethoxylate (OP-10) into a beaker, adding a small amount of distilled water, stirring till a solution is transparent, and transferring into a three-mouth flask; mounting a nitrogen tube and a stirring device in the three-mouth flask, and adding the distilled water; adding acrylamide (AM) and acrylic acid (AA), and stirring till complete dissolution; regulating the pH value to 7 with 20% by weight of NaOH solution; and introducing N2, performing constant-temperature reaction for a period of time, adding ammonium persulfate ((NH4)2S2O8) and sodium hydrogen sulfite (NaHSO3), and reacting for 8h to obtain a corresponding polymer. The polymer oil displacement agent shows good viscosity-increasing property, temperature resistance, anti-salt property and anti-shearing property, and can effectively improve the simulation crude oil recovery rate by 10.4%.

Description

technical field [0001] The invention relates to a novel water-soluble polymer oil displacement agent P(AM / NaAA / AMPL) and its synthesis. Background technique [0002] The oil extraction process is divided into primary oil recovery, secondary oil recovery and tertiary oil recovery. Both primary and secondary oil recovery are recovered through physical methods, and the recovery rate can reach 30%-40%. my country's major oil fields (such as Daqing, Shengli, Liaohe, etc.) have entered the late stage of secondary oil recovery, but most of the crude oil remains in the stratum after primary and secondary oil recovery. In order to improve the recovery rate of existing oil fields, three times Oil recovery technology is increasingly widely used. Polymer flooding technology is the main technology for enhanced oil recovery in tertiary oil recovery. It shows great potential both in technology and economy. It has been widely used at home and abroad, and has broad application prospects. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/588C08F220/56C08F220/06C08F226/06
Inventor 叶仲斌周利华苟绍华刘曼蒋文超何璇
Owner SOUTHWEST PETROLEUM UNIV
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