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Compound type crude oil demulsifier

A crude oil demulsifier and composite technology, which is applied in the direction of dehydration/demulsification by chemical methods, can solve the problems of poor universal applicability, difficulty in oil field production fluid treatment, and difficulty in achieving demulsification effect with a single-dose demulsifier, achieving Effect of strong interface activity and penetrating ability, good demulsification performance

Active Publication Date: 2011-04-06
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composition of crude oil in tertiary oil recovery is complex and its properties vary from place to place. The demulsification effect of the same demulsifier on different oil areas in the same oil field, or even on different oil wells in the same oil area may vary widely. great difficulty
[0004] Single-dose crude oil demulsifiers usually have the characteristics of strong application specificity and poor universal applicability. A demulsifier is often only suitable for the demulsification of certain components of crude oil. Highly complex emulsion system, it is difficult to achieve the ideal demulsification effect with a single-dose demulsifier

Method used

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  • Compound type crude oil demulsifier
  • Compound type crude oil demulsifier
  • Compound type crude oil demulsifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, the preparation of novel composite crude oil demulsifier (A)

[0023] 60g of the compound shown in formula (III) (i.e. long-chain alkyl 1.0G polyamide-amine, wherein the long-chain alkyl is octadecyl), 40g of the compound shown in formula (IV) (i.e. hydroquinone bridge The dialkyl carboxylic acid that connects, wherein, dialkyl carboxylic acid is dodecyl acid) and 100g ethanol are mixed homogeneously, obtain compound type crude oil demulsifier, mark as A, wherein, compound shown in formula (III) and The mass fraction ratio of the compound represented by the formula (IV) is 3:2, and the mass fraction ratio of the total mass of the compound represented by the formula (III) and the compound represented by the formula (IV) to ethanol is 1:1.

[0024]

Embodiment 2

[0025] Embodiment 2, the preparation of novel composite crude oil demulsifier (B)

[0026] 40g of the compound shown in formula (III) (i.e. long-chain alkyl 1.0G polyamide-amine, wherein the long-chain alkyl is octadecyl), 60g of the compound shown in formula (IV) (i.e. hydroquinone bridge The dialkyl carboxylic acid that connects, wherein, dialkyl carboxylic acid is dodecyl acid) and 100g ethanol are mixed homogeneously, obtain compound type crude oil demulsifier, mark as B, wherein, compound shown in formula (III) and The mass fraction ratio of the compound represented by the formula (IV) is 2:3, and the mass fraction ratio of the total mass of the compound represented by the formula (III) and the compound represented by the formula (IV) to ethanol is 1:1.

Embodiment 3

[0027] Embodiment 3, the preparation of novel composite crude oil demulsifier (C)

[0028] 70g of the compound shown in formula (III) (i.e. long-chain alkyl 1.0G polyamide-amine, wherein the long-chain alkyl is octadecyl), 30g of the compound shown in formula (IV) (i.e. hydroquinone bridge The dialkyl carboxylic acid that connects, wherein, dialkyl carboxylic acid is dodecyl acid) and 100g water are mixed homogeneously, obtain composite type crude oil demulsifier, mark as C, wherein, compound shown in formula (III) and The mass fraction ratio of the compound represented by the formula (IV) is 7:3, and the mass fraction ratio of the total mass of the compound represented by the formula (III) and the compound represented by the formula (IV) to water is 1:1.

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Abstract

The invention discloses a novel compound type crude oil demulsifier, which consists of a compound shown by a formula (I), a compound shown by a formula (II) and a solvent, wherein the mass part ratio of the sum of the compound shown by the formula (I) and the compound shown by the formula (II) to the solvent is (2-7):(3-8); the mass part ratio of the compound shown by the formula (I) to the compound shown by the formula (II) is (1-10):(1-5); and in the formula (I), R1 is alkyl of which a main chain comprises 8 to 24 carbon atoms, and in the formula (II), R2 is alkyl of which a main chain comprises 4 to 12 carbon atoms. The crude oil demulsifier has the excellent performance of demulsifying crude oil emulsion, and can be applied in the demulsifying and dehydration field of crude oil.

Description

technical field [0001] The invention relates to a crude oil demulsifier, in particular to a composite crude oil demulsifier. Background technique [0002] Crude oil demulsifier is an important chemical reagent in the process of oil extraction and gathering. With the application of tertiary oil recovery technology in major domestic oilfields, the treatment of produced fluid has become an important technical link in oilfield production, and oilfields have higher and higher performance requirements for demulsifiers. [0003] Demulsification by using a demulsifier is to add a demulsifier to the crude oil to partially replace the film-forming substances of the oil-water interface film of the crude oil emulsion to form a looser mixed film, reduce the mechanical strength and viscoelasticity of the oil-water interface film, and promote Collision aggregation and achieve the purpose of oil-water separation. Factors such as the structure of the demulsifier, crude oil components and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
Inventor 檀国荣周薇王金本周继柱徐晓慧胡长朝
Owner CHINA NAT OFFSHORE OIL CORP