A kind of high temperature anti-emulsion synergist and its preparation and application

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

Active Publication Date: 2021-09-10
CHINA NAT OFFSHORE OIL CORP +1
View PDF15 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of high temperature anti-emulsion synergist and its preparation and application
  • A kind of high temperature anti-emulsion synergist and its preparation and application
  • A kind of high temperature anti-emulsion synergist and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0045] (1) Weigh 70g of diethylenetriamine, 30g of bisphenol A, and 15g of paraformaldehyde into a high-temperature high-temperature reactor, 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, then start to add 1200g of propylene oxide and 5g of catalyst sodium hydroxide dropwise, 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, add 250g oxirane in total for about 5h. Then keep warm and wait for the reaction to be balanced to obtain the phenolamine resin polyether compound.

Embodiment 2

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

[0050] Weigh respectively 35% of phenolamine resin polyether compound, 15% of sodium petroleum 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 at 80° C. for 5 h in a high-temperature and high-pressure reactor to mix and stir the various substances to obtain high-temperature anti-milk synergist A.

Embodiment 3

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

[0053] Weigh respectively 40% of phenolamine resin polyether compound, 10% of sodium heavy alkylbenzene sulfonate, 0.15% of perfluorobetaine sulfonate, 1.5% of hydrophilic nano silicon dioxide particles, 3% of sodium sulfite, 45.35% isopropanol, 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-milk synergist B.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a high-temperature anti-milk synergist and its preparation and application, which comprises the following components in terms of mass percentage: 30-50% of phenolic amine resin polyether compound, 10-20% of sulfonate surfactant, fluorine 0.1-0.3% of carbon surfactant, 0.5-2% of hydrophilic nano silicon dioxide particles, 2-5% of oxygen scavenger, and 25-50% of alcohol solvent. The high-temperature anti-emulsion synergist can effectively inhibit the formation of water-in-oil emulsion between steam condensed water, hot water and formation heavy oil at the average temperature (150°C-250°C) of thermally exploited oil reservoirs in common oilfields, and can reduce oil-water Interfacial tension and changing wetting can not only comprehensively improve the thermal recovery effect of heavy oil oilfields, but also avoid impact on the treatment of oilfield produced fluids.

Description

technical field [0001] The present invention relates to the fields of oil and gas field anti-emulsion demulsifiers and oil field thermal recovery synergists, in particular to a high-temperature anti-emulsion synergist and its preparation and application. 250℃), suppress steam condensate water, hot water and formation heavy oil to form water-in-oil emulsion, and can reduce oil-water interfacial tension, change wetting, while comprehensively improving the thermal recovery effect of heavy oil oilfields, it also avoids damage to oilfield output Fluid handling causes shock. Background technique [0002] During the heat injection process of heavy oil thermal recovery, steam condensate or hot water contacts with the natural emulsifier colloids and asphaltene in the formation heavy oil, and it is easy to form a water-in-oil emulsion, which makes the viscosity of the heavy oil increase sharply and has a certain degree of stability. This leads to the increase of steam injection press...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(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