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Initiation system of electron transfer activated regenerated catalyst and gelation time control method

A regeneration catalyst and electron transfer technology, which is applied in chemical instruments and methods, chemical recovery, drilling compositions, etc., can solve problems such as slow initiation, difficult control of gelation time, uncontrollable gelation time, etc., to reduce freedom Base concentration, polymerization reaction controllable effect

Active Publication Date: 2020-06-09
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These three methods all use thermal decomposition of the initiator to generate free radicals for polymerization. Free radical polymerization has the kinetic characteristics of slow initiation, fast growth, and fast termination, and there will be a gel effect, which makes the gelation time difficult. Therefore, these three methods cannot fundamentally solve the problem of controlling the polymerization time of in-situ polymerization deep profile control agents in the reservoir
[0005] In order to fundamentally break through the technical difficulty of uncontrollable gelation time of commonly used in-situ polymerization profile control agents, and solve the outstanding contradiction between the injectability of deep profile control agents in low-permeability reservoirs and the deep plugging ability of reservoirs, the invention develops Developed an ARGET ATRP: Activators Regenerated by Electron Transfer Atom Transfer Radical Polymerization initiation system that can control the gelation time in a wide range

Method used

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  • Initiation system of electron transfer activated regenerated catalyst and gelation time control method
  • Initiation system of electron transfer activated regenerated catalyst and gelation time control method
  • Initiation system of electron transfer activated regenerated catalyst and gelation time control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Evaluation of Gelling Time in Polymerization System at 60℃

[0028] Put 5g of acrylamide monomer and 0.05g of cross-linking agent in a 250mL beaker, dissolve them in 95mL of distilled water, add the ARGET initiation system, stir until completely dissolved, and then put them in a constant temperature water bath at 60°C for reaction Several hours until gel formation occurs. Among them, the initiator is sodium chloroacetate, the dosage is 0.02g; the ligand is vitamin C, the dosage is 0.009g; the catalyst is ferric chloride, the dosage is 0.1mg~1mg, and the gelling time is between 13h~40h. The corresponding time is shown in Table 1:

[0029] Table 1 Gelling time at 60℃ with different catalyst additions

[0030]

Embodiment 2

[0032] Evaluation of Gelling Time in Polymerization System at 70℃

[0033] Put 5g of acrylamide monomer and 0.05g of cross-linking agent in a 250mL beaker, and dissolve them in 95mL of distilled water, add ARGET trigger system, stir until completely dissolved, then put it in a 70°C constant temperature water bath for reaction Several hours until gel formation occurs. Among them, the initiator is sodium chloroacetate, the dosage is 0.02g; the ligand is vitamin C, the dosage is 0.009g; the catalyst is ferric chloride, the dosage is 0.1mg~0.5mg, and the gelling time is between 12~30h. The specific corresponding time is shown in Table 2:

[0034] Table 2 Gelling time at 70°C with different catalyst additions

[0035]

Embodiment 3

[0037] Evaluation of Gelling Time in Polymerization System at 80℃

[0038] Put 5g of acrylamide monomer and 0.05g of cross-linking agent in a 250mL beaker, and dissolve them in 95mL of distilled water, add ARGET trigger system, stir until completely dissolved, then put it in a 70°C constant temperature water bath for reaction Several hours until gel formation occurs. The initiator is sodium chloroacetate, the dosage is 0.02g; the ligand is vitamin C, the dosage is 0.009g; the catalyst is ferric chloride, the dosage is 0.5mg~1mg, and the gelling time is between 12~55h. The specific corresponding time is shown in Table 3:

[0039] Table 3 Gelling time at 80°C with different catalyst additions

[0040]

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PUM

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Abstract

The invention discloses an initiating system of activators regenerated by electron transfer atom transfer radical polymerization and a gelling time control method. The initiating system of activatorsregenerated by electron transfer atom transfer radical polymerization comprises an initiator, a catalyst and a ligand; the initiator is an alpha-halogenated carbonyl compound and an alpha-halogenatednitrile compound or halohydrocarbon; the catalyst is transition metal ions; the ligand is one or a combination of two of glucose and hydroxylamine hydrochloride. In low temperature and high temperature reservoirs, the controllable range of the gelling time of in situ polymer gel is 10-55 h by regulating the dosage of various components in the initiating system. The technical difficulty that the gelling time of the polymer gel traditionally triggered by free radical is difficult to control is solved, and deep profile control is realized in the low temperature and high temperature reservoirs.

Description

technical field [0001] The invention belongs to the field of oil and gas field development, and in particular relates to an electron transfer activated regenerated catalyst initiation system and a gelling time control method. Background technique [0002] Oil well water production is a common phenomenon in the process of oilfield development. A large amount of water production from production wells not only reduces the degree of crude oil recovery, but also causes a large amount of economic losses due to lifting, separation and treatment of production water, and it is easy to cause corrosion and damage to oil well equipment. The destruction of the well body structure increases the workover and difficulty, shortens the life of the oil well and increases the production cost. Water plugging and profile control technology is one of the main measures to enhance oil recovery in my country's oilfields, and has achieved good economic benefits. [0003] Polymer bulk gel formed by po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F222/38C08F4/70C09K8/512
CPCY02P20/584
Inventor 岳湘安邵明鲁贺杰李环廖子涵赵仁保张立娟
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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