Broad-spectrum high-efficiency defoaming agent for offshore oilfield and preparation method of broad-spectrum high-efficiency defoaming agent

A high-efficiency defoamer, a technology for offshore oil fields, applied in separation methods, chemical instruments and methods, foam dispersion/prevention, etc., to achieve the effects of enhanced defoaming effect, good spreadability and diffusivity, and low surface tension

Active Publication Date: 2022-01-25
中海油(天津)油田化工有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this condition cannot be met when some offshore platforms, especially new oilfields are put into production

Method used

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  • Broad-spectrum high-efficiency defoaming agent for offshore oilfield and preparation method of broad-spectrum high-efficiency defoaming agent
  • Broad-spectrum high-efficiency defoaming agent for offshore oilfield and preparation method of broad-spectrum high-efficiency defoaming agent
  • Broad-spectrum high-efficiency defoaming agent for offshore oilfield and preparation method of broad-spectrum high-efficiency defoaming agent

Examples

Experimental program
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Effect test

Embodiment 1

[0044]A broad-spectrum high-efficiency defoamer for offshore oilfields of the present invention is prepared from a mass fraction of 8wt% defoaming main agent, 0.5wt% defoaming auxiliary agent, 1wt% synergist and 90.5wt% dispersant; wherein, The main antifoaming agent is 40 parts by mass of mixed polydimethylsiloxane of different molecular weights, 5 parts by mass of epoxy polydimethylsiloxane, 10 parts by mass of polydimethylsiloxane Alcohol and 0.5 parts by mass of hydrogen-containing MQ silicone resin are used as raw materials, and 0.01 parts by mass of organic tin compound is used as a catalyst to react in 44.49 parts by mass of an organic solvent.

[0045] The mixed polydimethylsiloxane with different molecular weights is composed of 40wt% polydimethylsiloxane 1#, 40wt% polydimethylsiloxane 2#, and 20wt% polydimethylsiloxane 3# .

[0046] The preparation method of above-mentioned offshore oil field broad-spectrum high-efficiency defoamer comprises the following steps:

...

Embodiment 2

[0051] A broad-spectrum high-efficiency defoamer for offshore oilfields of the present invention is prepared from a mass fraction of 10wt% defoaming main agent, 1wt% defoaming auxiliary agent, 1.2wt% synergist and 87.8wt% dispersant; wherein, The main defoaming agent is 50 parts by mass of mixed polydimethylsiloxane of different molecular weights, 8 parts by mass of epoxy polydimethylsiloxane, 5 parts by mass of polydimethylsiloxane Alcohol and 2 parts by mass of hydrogen-containing MQ silicone resin are used as raw materials, and 0.05 parts by mass of organotin compound is used as a catalyst to react in 34.95 parts by mass of an organic solvent.

[0052] The mixed polydimethylsiloxane of different molecular weights is composed of 50wt% polydimethylsiloxane 1#, 30wt% polydimethylsiloxane 2#, and 20wt% polydimethylsiloxane 3# .

[0053] The preparation method of above-mentioned offshore oil field broad-spectrum high-efficiency defoamer comprises the following steps:

[0054] ...

Embodiment 3

[0058] A broad-spectrum high-efficiency defoamer for offshore oilfields of the present invention is prepared from a mass fraction of 9wt% defoaming main agent, 0.8wt% defoaming auxiliary agent, 2wt% synergist and 88.2wt% dispersant; wherein, The main defoaming agent is 48 parts by mass of mixed polydimethylsiloxane of different molecular weights, 6.5 parts by mass of epoxy polydimethylsiloxane, 8.5 parts by mass of polydimethylsiloxane Alcohol and 1 mass part of hydrogen-containing MQ silicone resin are used as raw materials, and 0.03 mass part of organotin compound is used as a catalyst to react in 35.97 mass parts of organic solvent.

[0059] The mixed polydimethylsiloxanes with different molecular weights are composed of 50wt% polydimethylsiloxane 1#, 40wt% polydimethylsiloxane 2#, and 10wt% polydimethylsiloxane 3# .

[0060] The preparation method of above-mentioned offshore oil field broad-spectrum high-efficiency defoamer comprises the following steps:

[0061] Step 1:...

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Abstract

The invention discloses a broad-spectrum high-efficiency defoaming agent for an offshore oilfield. The broad-spectrum high-efficiency defoaming agent is prepared from the following components in percentage by mass: 8-10wt% of a defoaming main agent, 0.5-1wt% of a defoaming auxiliary agent, 1-2wt% of a synergist and the balance of a dispersing agent, wherein the defoaming main agent is prepared by taking mixed polydimethylsiloxane, epoxy polydimethylsiloxane, polydimethylsiloxane alcohol and hydrogen-containing MQ silicon resin with different molecular weights as raw materials and taking an organic tin compound as a catalyst to react in an organic solvent. The defoaming agent disclosed by the invention can be spread and diffused on the surface of foam more quickly, the interfacial strength of the foam is reduced, the defoaming effect is further enhanced, and the defoaming agent is widely applicable to oil-gas separation treatment of crude oil with different oil properties in offshore oilfields, and is a broad-spectrum and efficient crude oil defoaming agent product.

Description

technical field [0001] The invention belongs to the field of chemical defoaming, and relates to a crude oil defoaming agent, in particular to a broad-spectrum high-efficiency defoaming agent for offshore oil fields and a preparation method thereof. Background technique [0002] When the crude oil is produced from the oil well, due to the decrease of pressure and the change of temperature, the associated gas originally dissolved in the crude oil is gradually separated from the crude oil, forming a large number of bubbles. [0003] If the gas in the crude oil cannot be removed quickly and completely, the oil-gas mixture containing a large amount of gas will enter the production separation device, which will easily cause the separation device to fail to operate normally and cause fluctuations in the entire production process. What's more, there will be "pot leaking" security accidents, threatening the security of equipment and the entire platform. [0004] In onshore oilfields...

Claims

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Application Information

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IPC IPC(8): B01D19/04
CPCB01D19/0409B01D19/0404
Inventor 胡廷魏强程艳郭海军陆原杜大委张颖李羽
Owner 中海油(天津)油田化工有限公司
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