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Efficient oil-soluble demulsifier for thickened-oil field

A demulsifier and oil-soluble technology, which is applied in the field of high-efficiency oil-soluble demulsifiers for heavy oil oilfields, can solve the problems of low equipment processing efficiency, high cost, and few varieties, and achieve good water quality, low cost, and strong low-temperature demulsification Effect

Active Publication Date: 2015-09-23
DAQING BEIHUA CHEM PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing demulsifier single agent has technical problems such as few varieties, large dosage, high cost, and low equipment processing efficiency.

Method used

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  • Efficient oil-soluble demulsifier for thickened-oil field
  • Efficient oil-soluble demulsifier for thickened-oil field
  • Efficient oil-soluble demulsifier for thickened-oil field

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Preparation and application of a high-efficiency oil-soluble demulsifier SR-01 for heavy oil fields.

[0014] Component distribution ratio: the molar ratio of triethylene glycol to potassium hydroxide is 2:1, the molar ratio of triethylene glycol to demulsifier monomer alkylphenolic resin-polyoxypropylene polyoxyethylene ether is 1:2, and the initiator is over Benzoyl oxide is 8% of the mass of alkylphenol formaldehyde resin-polyoxypropylene polyoxyethylene ether.

[0015] Preparation method: The polymerization reaction temperature is 80°C, the reaction time is 4h, the esterification reaction temperature is 140°C, and the time is 3h. The product is diluted 1 times with naphtha.

[0016] Implementation object: Manifold oil samples produced in Bohai Bay Oilfield, with a viscosity of 2000mpa·s; asphaltene and colloid contents of 20.2% and 7.9% respectively.

[0017] Implementing equipment: high-pressure reaction kettle, strong mixer, high-shear mixing emulsifier, constan...

Embodiment 2

[0022] Preparation and application of a high-efficiency oil-soluble demulsifier SR-02 for heavy oil fields:

[0023] Component distribution ratio: the molar ratio of triethylene glycol to potassium hydroxide is 2.5:1, the molar ratio of triethylene glycol to demulsifier monomer alkylphenolic resin-polyoxypropylene polyoxyethylene ether is 1:3, and the initiator is over Benzoyl oxide is 8% of the mass of alkylphenol formaldehyde resin-polyoxypropylene polyoxyethylene ether.

[0024] The preparation method, implementation object and implementation method are the same as in Example 1, and the results are shown in Table 2.

[0025] Table 2 Dehydration effect of different concentrations of demulsifier SR-02

[0026]

Embodiment 3

[0028] Preparation and application of a high-efficiency oil-soluble demulsifier SR-03 for heavy oil fields:

[0029] Component distribution ratio: the molar ratio of triethylene glycol to potassium hydroxide is 3:1, the molar ratio of triethylene glycol to demulsifier monomer alkylphenolic resin-polyoxypropylene polyoxyethylene ether is 2:3, and the initiator is over Benzoyl oxide is 8% of the mass of alkylphenol formaldehyde resin-polyoxypropylene polyoxyethylene ether.

[0030] The preparation method, implementation object and implementation method are the same as in Example 1, and the results are shown in Table 3.

[0031] Table 3 Dehydration effect of different concentrations of demulsifier SR-03

[0032]

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Abstract

The invention relates to an efficient oil-soluble demulsifier for a thickened-oil field, and belongs to the technical field of petroleum processing. The efficient oil-soluble demulsifier for the thickened-oil field includes the following components: triethylene glycol, potassium hydroxide, alkyl phenol resin-polyoxypropylene polyoxyethylene ether, and di-isopropyl peroxydicarbonate, wherein the molar ratio of triethylene glycol to potassium hydroxide is (1-3):(0.5-1), the molar ratio of triethylene glycol to the demulsifier monomer alkyl phenol resin-polyoxypropylene polyoxyethylene ether is (1-2):(2-3), and the initiator di-isopropyl peroxydicarbonate is 8-10% of alkyl phenol resin-polyoxypropylene polyoxyethylene ether in mass; polymerization and esterification are adopted for preparing the demulsifier, the reaction temperature is 80-90 DEG C, and the reaction time is 3-5 hours; then the temperature is increased to 130-150 DEG C for an esterification reaction, and the reaction time is 2-4 hours. The efficient oil-soluble demulsifier for the thickened-oil field has the advantages of being higher in surface activity, better in hydrophilic-lipophilic properties, applicable to low-temperature thickened oil, high in demulsification efficiency, low in cost, small in usage, small in toxic and side effect, and obvious in effect.

Description

technical field [0001] The invention belongs to the technical field of petroleum processing, in particular to a high-efficiency oil-soluble demulsifier for heavy oil fields. Background technique [0002] At present, as the oilfield enters the middle and later stages, the comprehensive water cut of crude oil has increased significantly, and the crude oil production has decreased year by year. In order to increase and stabilize production, oilfields generally use various chemical compound flooding measures (polymer flooding, ASP flooding and surface active polymer flooding, etc.) to improve oil recovery and increase crude oil production; during the process of crude oil extraction, chemical reactions occur, and mechanical impurities such as highly conductive clay and solid particles, chemical agents for increasing production and injection, and sewage treatment are emulsified The mixing of additives increases the viscosity of the production fluid, the emulsion structure is very ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
Inventor 康玉彬梁海东
Owner DAQING BEIHUA CHEM PLANT
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