Low-viscosity high-efficiency emulsion type defoaming agent for offshore oilfield and preparation method thereof

An emulsion-type defoamer, offshore oilfield technology, applied in separation methods, chemical instruments and methods, liquid degassing, etc., can solve problems such as poor performance, difficult on-site filling, high viscosity, etc., and achieve good spreadability and diffusivity , Good emulsification and dispersion effect, good hydrophilic effect

Active Publication Date: 2021-06-04
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

It makes up for the poor performance of the current emulsion-type defoamer for offshore oilfield defoaming treatment, and the defects of high viscosity

Method used

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  • Low-viscosity high-efficiency emulsion type defoaming agent for offshore oilfield and preparation method thereof
  • Low-viscosity high-efficiency emulsion type defoaming agent for offshore oilfield and preparation method thereof
  • Low-viscosity high-efficiency emulsion type defoaming agent for offshore oilfield and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A low-viscosity and high-efficiency emulsion-type defoamer for offshore oilfields of the present invention is prepared from a mass fraction of 5wt% defoamer main agent, 1wt% co-emulsifier, 0.01wt% stabilizer and 93.99wt% dispersant Wherein, the antifoaming main agent is the polyether silicone oil B of the active silicone paste A of 10 mass parts, 80 mass parts, the propylene glycol polyether C of 10 mass parts, accounting for the mass fraction of the antifoaming main agent is 0.01% Prepared under the catalysis of solid complex platinum.

[0037] The active silicone paste A consists of 30 parts by mass of mixed structure long-chain alkyl polydimethylsiloxane, 25 parts by mass of high molecular weight polydimethylsiloxanol and 30 parts by mass of polyether alkyl Modified silicone oil is prepared by reacting 15 parts by mass of hydrophilic fumed silica at high temperature.

[0038] The preparation method of the low-viscosity high-efficiency emulsion type defoamer for the ...

Embodiment 2

[0043] A low-viscosity high-efficiency emulsion-type defoamer for offshore oilfields of the present invention is prepared from a mass fraction of 10wt% defoamer main agent, 2wt% co-emulsifier, 0.02wt% stabilizer and 87.98wt% dispersant; Wherein, the antifoaming main agent is 30 mass parts of active silicone paste A, 40 mass parts of polyether silicone oil B, 30 mass parts of propylene glycol polyether C, and the mass fraction of the antifoaming main agent is 0.02% solid Prepared under the catalysis of complex platinum.

[0044] The active silicone paste A consists of 40 parts by mass of mixed structure long-chain alkyl polydimethylsiloxane, 40 parts by mass of high molecular weight polydimethylsiloxanol and 10 parts by mass of polyether alkyl Modified silicone oil is prepared by reacting 10 parts by mass of hydrophilic fumed silica at high temperature.

[0045] The preparation method of the low-viscosity high-efficiency emulsion type defoamer for the above-mentioned offshore ...

Embodiment 3

[0050] A low-viscosity and high-efficiency emulsion-type defoamer for offshore oil fields of the present invention is prepared from a mass fraction of 8wt% defoamer main agent, 1.5wt% co-emulsifier, 0.015wt% stabilizer and 90.485wt% dispersant Wherein, described defoaming main agent is the polyether silicone oil B of the active silicone paste A of 20 mass parts, 60 mass parts, the propylene glycol polyether C of 20 mass parts, accounting for the mass fraction of defoaming main agent is 0.05% Prepared under the catalysis of solid complex platinum.

[0051] The active silicone paste A consists of 32 parts by mass of mixed structure long-chain alkyl polydimethylsiloxane, 30 parts by mass of high molecular weight polydimethylsiloxanol and 30 parts by mass of polyether alkyl Modified silicone oil, prepared by reacting 8 parts by mass of hydrophilic fumed silica at high temperature.

[0052] The preparation method of the low-viscosity high-efficiency emulsion type defoamer for the ...

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Abstract

The invention discloses a low-viscosity high-efficiency emulsion type defoaming agent for an offshore oilfield and a preparation method thereof. Long-chain alkyl polydimethylsiloxane with a mixed structure, high-molecular-weight polydimethylsiloxane alcohol and polyether alkyl modified silicone oil are used as raw materials, a hydrophilic gas-phase white carbon black reinforcing agent react to prepare active silicon paste A; mixed polyether silicone oil B, propylene glycol polyether C and active silicon paste A with specific structures are mixed and react under the catalysis of reusable solid complex platinum to prepare a main agent of the defoaming agent, and a low-viscosity and high-efficiency emulsion type defoaming agent product is prepared by taking isomeric alcohol ether as a co-emulsifier, deionized water as a dispersing agent and pentaerythritol allyl ether polymer as a stabilizer. The product is low in viscosity and good in stability, has a better foam breaking effect on crude oil foams of offshore oilfields, and better meets the application requirements of offshore platforms.

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 low-viscosity and high-efficiency emulsion type defoaming agent for offshore oil fields and a preparation method thereof. Background technique [0002] Different from onshore oilfields, offshore oilfields have the characteristics of small processing space, short time, and difficulties in the later transformation of process equipment, and have higher requirements for chemical additives. Oil and gas separation is an important link in offshore oilfield production. Once the oil and gas separation treatment fails to meet the requirements, it will immediately lead to the reduction of the effective separation space of the crude oil separator, the failure of the electric dehydrator to operate normally, black smoke dripping from the torch, cavitation of the export pump, etc. A series of problems, which in turn lead to oilfield production redu...

Claims

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Application Information

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IPC IPC(8): B01D19/04
CPCB01D19/0409
Inventor 胡廷魏强陆原张国欣郭海军程艳杜大委李羽
Owner 中海油(天津)油田化工有限公司
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