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Fluoride-containing polyurethane CO2 gas soluble foaming agent and preparation method and use thereof

A technology based on polyurethane and CO2, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems that do not involve the gas-soluble foaming agent co-solvent system, etc., so as to avoid the problem of easy corrosion, improve solubility, and improve The effect of solubility

Inactive Publication Date: 2015-07-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these two types of gas-soluble surfactants have certain solubility in water and gas phase carbon dioxide, the solubility in the gas phase is less than 1%. zero, while the current CO 2 Reservoirs requiring mobility control are mostly low-permeability, high-temperature and high-salinity reservoirs, and gas-soluble blowing agents that are resistant to high temperatures and high salinity are more needed
Moreover, there is no co-solvent system related to gas-soluble blowing agent in the patent document CN201410131646

Method used

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  • Fluoride-containing polyurethane CO2 gas soluble foaming agent and preparation method and use thereof
  • Fluoride-containing polyurethane CO2 gas soluble foaming agent and preparation method and use thereof
  • Fluoride-containing polyurethane CO2 gas soluble foaming agent and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In a dry three-necked flask with a stirrer, a condenser and a dropping funnel, add 0.6 mol of dodecafluoroheptanol and 0.5 mol of toluene 2,4-diisocyanate dropwise, add 0.03 mol of dibutyltin dilaurate, Raise the temperature to 60°C and reflux for 9 hours; then add 0.6 mol of allyl polyoxyethylene (14) ether dropwise, and continue to reflux for 5 hours. The product is precipitated by petroleum ether and dissolved in chloroform to remove excess alcohol and ether to obtain dodecafluoro Heptane Tetradecyl Polyoxyethylene Ether Polyurethane.

[0036] Add 20mol of water to the reaction vessel with stirrer, condenser and dropping funnel, add 0.2mol of dodecafluoroheptane allyl polyoxyethylene (14) ether polyurethane, 0.015mol of hexadecyl trimethyl Ammonium Bromide, 0.4mol NaHSO 3 , heated to 90°C, reacted for 10 h, extracted the mixed liquid with petroleum ether, and removed the solvent by rotary evaporation to obtain sodium dodecafluoroheptane tetraallyl polyoxyethylene et...

Embodiment 2

[0038] Add 0.11mol of hexadecafluorononanol and 0.1mol of isophorone diisocyanate dropwise to a three-necked flask with a stirrer, a condenser and a dropping funnel, add 0.008mol of stannous octoate, heat up to 80°C, and reflux After 7 hours; add 0.11mol of methallyl polyoxyethylene (44) ether dropwise, and continue to reflux for 8 hours. The product is precipitated by petroleum ether and dissolved in chloroform to remove excess alcohol and ether, and hexadecafluorononane 44 can be obtained. Tetraallyl polyoxyethylene ether polyurethane.

[0039] Add 10 mol of water into the reaction vessel with stirrer, condenser and dropping funnel, add 0.1 mol of hexadecafluorononyl allyl polyoxyethylene (44) ether polyurethane, 0.007 mol of 18 crown 6 ether, 0.15 mol of NaHSO 3 , heated up to 110°C, reacted for 6 hours, extracted the mixed liquid with petroleum ether, and removed the solvent by rotary evaporation to obtain hexadecafluorononyl tetratetratrasallyl polyoxyethylene ether sodi...

Embodiment 3

[0041] In a dry three-necked flask with a stirrer, a condenser and a dropping funnel, add 0.6 mol of tetrafluoropropanol and 0.6 mol of hexamethylene-diisocyanate dropwise, add 0.0006 mol of triethylamine, and heat up to 30°C. After reflux for 30 hours; add 0.6 mol of allyl polyoxyethylene (10) ether dropwise, continue to reflux for 1 hour, the product is precipitated by petroleum ether, dissolved in chloroform to remove excess alcohol and ether, and tetrafluoropropyl allyl polyethene can be obtained. Oxyethylene(10) ether polyurethane.

[0042] Add 12 mol of water to the reaction vessel with stirrer, condenser and dropping funnel, add 0.2 mol of tetrafluoropropyl allyl polyoxyethylene (10) ether polyurethane, 0.02 mol of polyethylene glycol 400, 0.2 mol of NaHSO 3 , heated to 50° C., reacted for 15 hours, extracted the mixed liquid with petroleum ether, and removed the solvent by rotary evaporation to obtain sodium tetrafluoropropane allyl polyoxyethylene (10) ether polyureth...

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Abstract

The invention provides a CO2 gas soluble foaming agent and a preparation method and application thereof, and belongs to the field of oil field chemicals. The CO2 gas soluble foaming agent is allyl polyoxyethylene ether fluorine-containing polyurethane sodium sulfonate which is obtained by sultified reaction of sodium bisulfate aqueous solution and allyl polyoxyethylene ether fluorine-containing polyurethane Z, wherein the allyl polyoxyethylene ether fluorine-containing polyurethane Z is a product of diazonium addition reaction of fluorine-containing alcohol Rf-Oh, R2 substituted allyl polyether and isocyanate group in diisocyanate CON-R1-NCO. The allyl polyoxyethylene ether fluorine-containing polyurethane sodium sulfonate can be alone dissolved in CO2 or dissolved in CO2 with a dissolved in CO2, subsequently injected into the formation, preferentially enters a high permeability zone with the CO2, and meets bound water in the formation or a subsequent auxiliary slug to use as a foaming agent to produce foams to inhibit fluid channeling in subsequent CO2 displacement process.

Description

Technical field: [0001] The invention relates to the field of oilfield chemicals, in particular to a fluorine-containing polyurethane CO 2 Air-soluble blowing agent and its preparation method and use. Background technique [0002] CO 2 Oil flooding technology refers to CO 2 Under oil reservoir conditions, it can be dissolved in a large amount of crude oil to cause its volume to expand, its viscosity to decrease, and reduce the interfacial tension between oil and water. It has the advantages of wide application range, low oil displacement cost, and significant increase in oil recovery. Tertiary oil recovery projects for salt, medium-low permeability and heavy oil reservoirs. At present, carbon dioxide flooding has become an important technology for tertiary oil recovery, but the technology itself still has some problems, such as: CO 2 The problem of channeling and small sweep coefficient, the problem of the reduction of injection capacity caused by the alternate injection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/594C09K8/584C08G65/333C08G65/326
CPCC08G65/326C08G65/33344C09K8/584C09K8/594
Inventor 汪庐山王涛靳彦欣刘承杰刘巍徐鹏胡秋平王昊衣哲韦雪
Owner CHINA PETROLEUM & CHEM CORP
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