A preparation method of fluorescent tracer polymer microgel profile control and water shutoff agent

A technology of profile control and water blocking agent and fluorescent tracer, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problem that the polymer microgel profile control agent cannot be effectively traced and the concentration of the produced fluid cannot be detected. Accurate, difficult to characterize structural changes, etc., to avoid aggregation-induced fluorescence quenching, low cost, and strong functionality

Active Publication Date: 2020-05-15
BEIJING YIHAI ENERGY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] According to the above-mentioned technical problems, the purpose of the present invention is to provide a method for preparing a fluorescent tracer polymer microgel profile control water blocking agent, which solves the problem that the existing polymer microgel profile control agent cannot be effectively traced and the structure change is not easy Problems such as inaccurate detection of characterization and concentration of produced fluid

Method used

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  • A preparation method of fluorescent tracer polymer microgel profile control and water shutoff agent
  • A preparation method of fluorescent tracer polymer microgel profile control and water shutoff agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1. Mix 150 g of acrylamide, 50 g of methacrylic acid, 0.5 g of perylene diimide quaternized cross-linking monomer as cross-linking agent A and 220 g of deionized water, and stir at room temperature to obtain a mixed solution 1;

[0034] Step 2, 100g sorbitan glyceride, 40g sorbitan monooleate polyoxyethylene ether and 350g diesel oil are mixed to obtain mixed solution 2;

[0035] Step 3: Add the mixed solution 1 into the mixed solution 2 at an emulsification stirring speed of 1200 rpm, emulsify at room temperature for 30 minutes, reduce the stirring speed to 400 rpm, and deoxygenate with nitrogen for 20 minutes, Put the above mixed solution in a water bath at 10°C, add 3g of potassium persulfate and 1g of sodium ascorbate to initiate the polymerization reaction, and react at a constant temperature of 70°C for 4 hours to obtain the fluorescent tracer polymer microgel profile control and water shutoff agent YH-1 .

[0036] Using the Malvern dynamic light scattering ...

Embodiment 2

[0038] Step 1. Mix 130 g of acrylamide, 40 g of acrylic acid, 0.5 g of perylene diimide quaternized cross-linking monomer as cross-linking agent A and 200 g of deionized water, and stir at room temperature to obtain a mixed solution 1;

[0039] Step 2, 60g sorbitol glyceride, 20g octylphenol polyoxyethylene ether and 350g diesel oil are mixed to obtain mixed solution 2;

[0040] Step 3: Add the mixed solution 1 into the mixed solution 2 at an emulsifying stirring speed of 1200 rpm, and emulsify at room temperature for 30 minutes. Reduce the stirring speed to 400 rpm, remove the dissolved oxygen in the water with nitrogen gas for 20 minutes, put the above mixed solution in a water bath at 10°C, add 3g of ammonium persulfate and 3g of sodium pyrosulfite to initiate the polymerization reaction, and react at a constant temperature of 70°C for 4 Hours, traced polymer microgel profile control and water shutoff agent YH-2 was obtained.

[0041] Using a laser scanning confocal fluore...

Embodiment 3

[0043]Step 1. Mix 120g acrylamide, 60g sodium 2-acrylamido-2-methylpropanesulfonate, 0.4g perylene diimide quaternization crosslinking monomer (crosslinking agent A) and 200g deionized water , stirred at room temperature to obtain the mixed solution 1;

[0044] Step 2: Mix 40 g of sorbitan trioleate, 10 g of sorbitan monooleate polyoxyethylene ether and 300 g of diesel oil to obtain a mixed solution 2.

[0045] Step 3: Add the mixed solution 1 into the mixed solution 2 at an emulsifying stirring speed of 1200 rpm, and emulsify at room temperature for 15 minutes. Reduce the stirring speed to 400 rev / min, pass nitrogen gas to remove oxygen for 20 minutes, put the above mixed solution in a water bath at 10°C, add 3g of ammonium persulfate and 3g of ethanolamine to initiate the polymerization reaction, and react at a constant temperature of 70°C for 4 hours to obtain tracer Type polymer microgel profile control and water shutoff agent YH-3.

[0046] Using a laser scanning confoc...

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Abstract

The invention provides a method for preparing a fluorescent tracer polymer microgel profile control and water shutoff agent, which is prepared from the following raw materials in terms of mass percentage: acrylamide, water-soluble ionic monomer, crosslinking agent A and Mix the ionic water to obtain the mixed solution 1; mix the emulsifier and the oil-soluble solvent to obtain the mixed solution 2; add the mixed solution 1 to the mixed solution 2, emulsify at room temperature, remove oxygen, and add an oxidizing agent and a reducing agent as an initiator The mixed solution is mixed in a water bath for inverse emulsion polymerization. After the polymerization is completed, the temperature is lowered to room temperature to obtain a fluorescent tracer polymer microgel profile control water shutoff agent. The invention has the following advantages: the required content of the fluorescent crosslinking agent is very low, effectively avoiding aggregation-induced fluorescence quenching, and the cost is low; it is not interfered by other comonomer types, emulsifiers and lipid substances in the polymer microgel, Strong anti-interference; strong functionality, capable of simultaneously detecting particle size and structure change characteristics; high sensitivity, simple preparation method.

Description

technical field [0001] The invention belongs to the technical field of oil field development medicaments, and in particular relates to a preparation method of a fluorescent tracer polymer microgel profile control and water shutoff agent. Background technique [0002] Profile control and water plugging are one of the effective means in the development stage of oilfields in the medium-high water-cut period. The technology of profile control and flooding mainly uses large-dose deep treatment to block high-permeability layers or fractures, change the flow direction of the post-injection fluid, and increase the oil displacement of the displacement agent. Area and oil displacement efficiency, in order to improve the purpose of water control and oil stabilization, but the traditional inorganic profile control agent is easy to precipitate and cannot enter the deep formation for plugging, and the underground cross-linked gel profile control agent has poor controllability and high cost...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F220/06C08F222/22C08F222/38C08F2/34C09K8/512
CPCC09K8/512C08F2/34C08F220/56C08F222/1025C08F220/585C08F220/06C08F222/38
Inventor 郝翔李秀影梁玉彪
Owner BEIJING YIHAI ENERGY TECH CO LTD
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