Polymer flooding crude oil low temperature fast demulsifier and preparation method thereof

A crude oil demulsifier and demulsifier technology, applied in the direction of chemical dehydration/demulsification, etc., can solve the problems of high oil content in the extracted water, unsatisfactory demulsification effect, and thick emulsification layer, and achieve low oil content in the extracted water. Excellent compatibility and synergy, clear oil-water interface

Active Publication Date: 2019-10-29
盘锦富隆化工有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] With the continuous deepening of tertiary oil recovery, various oil recovery technologies have been applied, among which the use of polymer flooding is one of the methods to enhance oil recovery. Macroscopically, it mainly depends on increasing the viscosity of the displacement fluid and reducing the viscosity of the displacement fluid. The mobility ratio of the displaced fluid increases the swept volume; at the microscopic level, due to its inherent viscoelasticity, the polymer has a stretching effect on the oil film or oil droplets during the flow process, which increases the carrying force and improves the microscopic Oil washing efficiency, but polymer flooding also brings negative effects to crude oil dehydration such as high dehydration temperature, slow dehydration speed, high oil content in dewatered water, thick emulsified layer at oil-water interface, etc. while increasing oil recovery, as disclosed in patent CN101100615 A kind of low-temperature demulsifier applicable to Huabei Oilfield is disclosed, a kind of low-temperature demulsifier for heavy oil is disclosed in the patent CN102321257A, and a kind of low-temperature rapid demulsifier for water-containing waxy crude oil is disclosed in the patent CN1537924A, but these demulsifiers The demulsification effect of polymer flooding crude oil is not ideal, reflecting the strong pertinence of crude oil demulsifiers

Method used

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  • Polymer flooding crude oil low temperature fast demulsifier and preparation method thereof
  • Polymer flooding crude oil low temperature fast demulsifier and preparation method thereof
  • Polymer flooding crude oil low temperature fast demulsifier and preparation method thereof

Examples

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Effect test

Embodiment 1

[0040] 1. Phenolic resin synthesis

[0041] According to the molar ratio, phenol: aldehyde=1.5: 2.6, octylphenol and benzaldehyde are dropped in the reactor successively, then add the xylene of 25% of octylphenol and benzaldehyde total fraction, stir and heat up to 35~ Mix for 1 hour at 45°C, add sulfuric acid of 0.25% of the total number of octylphenol and benzaldehyde, heat up to 110-120°C and reflux for 1 hour, gradually heat to 130-135°C and reflux for 3 hours, cool to room temperature to obtain phenolic resin R1.

[0042] 2. Modification of phenolic resin

[0043] According to the molar ratio, phenolic resin R1: epichlorohydrin: hexadecylamine=0.8:3:1, first add the phenolic resin R1 in 1 to the reactor, and then add 3% potassium hydroxide aqueous solution of phenolic resin quality (Previously dilute potassium hydroxide with deionized water into a solution with a mass percent concentration of 60%), stir evenly, heat to 90-105°C, then slowly add a proportioning amount of...

Embodiment 2

[0051] 1. Phenolic resin synthesis

[0052] According to the molar ratio, phenol: aldehyde=1.3: 2.1, put naphthol and furfural into the reactor successively, then add the xylene of 22% of the total parts of naphthol and furfural, stir and heat up to 35~45 ℃, mix For 1 hour, add 0.21% benzenesulfonic acid based on the total amount of naphthol and furfural, heat up to 110-120° C. and reflux for 1 hour, gradually heat to 130-135° C. and reflux for 3 hours, and cool to room temperature to obtain phenolic resin R2.

[0053] 2. Modification of phenolic resin

[0054] According to the molar ratio, phenolic resin R2: epoxy chlorobutane: octadecylamine=0.8: 3: 1, first add the phenolic resin R1 in 1 to the reactor, and then add 3% sodium hydroxide of the phenolic resin quality Aqueous solution (previously dilute sodium hydroxide with deionized water to a solution with a mass percentage concentration of 58%), stir evenly, heat to 90-105°C, and then slowly add a proportioned amount of e...

Embodiment 3

[0062] 1. Phenolic resin synthesis

[0063] According to the molar ratio, phenol: aldehyde=1.2: 2.3, drop into p-tert-butylphenol and formaldehyde in the reactor successively, then add the xylene of 24% of the total parts of p-tert-butylphenol and formaldehyde, stir and heat up to 35-45°C, mix for 1 hour, add 0.25% petroleum sulfonic acid based on the total number of p-tert-butylphenol and formaldehyde, heat up to 110-120°C and reflux for 1 hour, gradually heat to 130-135°C and reflux for 3 hours, then cool down to room temperature to obtain phenolic resin R3.

[0064] 2. Modification of phenolic resin

[0065] According to the molar ratio, phenolic resin R3: epichlorohydrin: methyldiethanolamine=0.8: 3: 1, first add the phenolic resin R1 in 1 to the reactor, and then add 3% potassium hydroxide of the phenolic resin quality Aqueous solution (dilute potassium hydroxide with deionized water in advance to form a solution with a mass percent concentration of 60%), stir evenly, h...

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Abstract

The invention discloses a polymer flooding crude oil low temperature fast demulsifier and a preparation method thereof. The polymer flooding crude oil low temperature fast demulsifier is prepared fromthe following components in percentage by mass: 35-70% of a DR-type crude oil demulsifier, 15-60% of a conventional TA1031 crude oil demulsifier, 0.5-2% of vitamin C and3-7% of urea by the preparation method. The DR type crude oil demulsifier, the conventional demulsifier TA1031, the vitamin C and the urea are uniformly mixed by mass percentage, and the polymer flooding crude oil low temperaturefast demulsifier PR is obtained. According to the polymer flooding crude oil low temperature fast demulsifier, Daqing polymer flooding crude oil can be effectively demulsified, and the polymer flooding crude oil low temperature fast demulsifier has the characteristics of high low-temperature demulsification speed, high demulsification efficiency, clear oil-water interface, and low oil content in dehydrated water.

Description

technical field [0001] The invention relates to the technical field of oilfield chemical preparations, in particular to a low-temperature rapid demulsifier for polymer flooding crude oil and a preparation method thereof. Background technique [0002] With the continuous deepening of tertiary oil recovery, various oil recovery technologies have been applied, among which the use of polymer flooding is one of the methods to enhance oil recovery. Macroscopically, it mainly depends on increasing the viscosity of the displacement fluid and reducing the viscosity of the displacement fluid. The mobility ratio of the displaced fluid increases the swept volume; at the microscopic level, due to its inherent viscoelasticity, the polymer has a stretching effect on the oil film or oil droplets during the flow process, which increases the carrying force and improves the microscopic Oil washing efficiency, but polymer flooding also brings negative effects to crude oil dehydration such as hi...

Claims

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Application Information

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IPC IPC(8): C10G33/04
CPCC10G33/04
Inventor 胡新生胡毓桓王方
Owner 盘锦富隆化工有限公司
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