High-temperature anti-emulsion synergist, and preparation method and application method thereof

A synergist and anti-demulsification technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of up to 120 ℃ ~ 250 ℃, inability to prevent demulsification and demulsification, and inactivation of demulsifiers, and achieve resistance to demulsification. Enhanced thermal demulsification ability, high anti-demulsification effect, and the effect of reducing oil-water interfacial tension

Active Publication Date: 2019-05-03
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the ground heat injection temperature is 250-350°C during thermal recovery and heat injection, and the formation temperature is often as high as 120-250°C, the demulsifier is inactivated and cannot play the role of demulsification and demulsification in the formation.

Method used

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  • High-temperature anti-emulsion synergist, and preparation method and application method thereof
  • High-temperature anti-emulsion synergist, and preparation method and application method thereof
  • High-temperature anti-emulsion synergist, and preparation method and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This example is used to prepare a phenolamine resin polyether compound.

[0045] (1) Weigh 70g of diethylenetriamine, 30g of bisphenol A, and 15g of paraformaldehyde into a high temperature and high reaction kettle, and react at 80°C for 2 hours to obtain a phenolamine resin.

[0046] (2) Heat to 120°C and start vacuuming to negative pressure, then continue to heat up to 145°C, and then start to add 1200g of propylene oxide and 5g of sodium hydroxide as the catalyst, and react for 5h. Cool to 80°C to obtain phenolic resin polyoxyethylene ether.

[0047] (3) Continue heating to 130°C and start vacuuming for 30 minutes. Start to add ethylene oxide dropwise, and add 250 g of ethylene oxide in about 5 hours. Then, it is kept warm until the reaction is balanced to obtain a phenolamine resin polyether compound.

Embodiment 2

[0049] This example is used to prepare high-temperature anti-emulsion synergist.

[0050] Weigh 35% of phenolamine resin polyether compound, 15% of petroleum sodium sulfonate, 0.1% of perfluorobetaine, 1% of hydrophilic nano silica particles, 4% of thiourea, and 44.9 of ethylene glycol according to the following mass ratios. %, stirring in a high temperature and high pressure reactor at 80°C for 5 hours to mix and stir the various substances to obtain a high temperature demulsifier synergist A.

Embodiment 3

[0052] This example is used to prepare high-temperature anti-emulsion synergist.

[0053] Weigh 40% of phenolamine resin polyether compound, 10% of sodium heavy alkylbenzene sulfonate, 0.15% of betaine perfluorosulfonate, 1.5% of hydrophilic nano-silica particles, and 3% of sodium sulfite according to the following mass ratios. Isopropanol 45.35%, stirred in a high temperature and high pressure reactor at 50° C. for 2 hours to mix and stir the various substances to obtain high temperature anti-emulsion synergist B.

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Abstract

The invention relates to a high-temperature anti-emulsion synergist, and a preparation method and application method thereof. The high-temperature anti-emulsion synergist comprises the following components in percentage by mass: 30-50% of a phenol-amine resin polyether compound, 10-20% of a sulfonate surfactant, 0.1-0.3% of a fluorocarbon surfactant, 0.5-2% of hydrophilic nano silicon dioxide particles, 2-5% of a deoxidant and 25-50% of an alcohol solvent. Under an average temperature (150-250 DEG C) of thermal-power exploitation of oil reservoir in a common oil field, the high-temperature anti-emulsion synergist can effectively inhibit that steam condensate, hot water and thick oil of the stratum form a water-in-oil emulsion, oil-water interfacial tension can be reduced, wetting can be changed, and impact on treatment of oil-field output liquid is avoided while the thermal-power exploitation effect of a thickened oil field is comprehensively improved.

Description

Technical field [0001] The present invention relates to the field of oil and gas field anti-emulsification demulsifiers and oil field thermal recovery synergists, in particular to a high-temperature anti-emulsification synergist and its preparation and application, in particular under the average temperature of (120~ 250℃), inhibit steam condensed water, hot water and formation heavy oil from forming water-in-oil emulsion, and can reduce oil-water interfacial tension, change wetting, and comprehensively improve the thermal recovery effect of heavy oil field while avoiding oil field output Liquid treatment causes shock. Background technique [0002] In the heat injection process of heavy oil thermal recovery, steam condensed water or hot water is in contact with the natural emulsifier colloid and asphaltene in the formation heavy oil, which can easily form a water-in-oil emulsion, which makes the viscosity of the heavy oil increase sharply and has certain stability This results i...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C09K8/592C09K8/584
Inventor王少华孙永涛汪成孙玉豹邹剑王秋霞吴春洲肖洒
OwnerCHINA NAT OFFSHORE OIL CORP