Demulsification method of oil-in-water type crude oil emulsion

An oil-in-water, emulsion technology, applied in the direction of dehydration/demulsification by mechanical methods, can solve the problems of continuous production being difficult to proceed smoothly, easily destroying the electric field, failure, etc., and achieve better demulsification effect and demulsification time. Short, stable effects

Inactive Publication Date: 2015-09-02
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This production fluid contains a large amount of water, which leads to the failure of conventional methods
Specifically, if this emulsion enters the electric dehydrator, it is easy to destroy the electric field, causing tripping, and continuous production is difficult to proceed smoothly.

Method used

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  • Demulsification method of oil-in-water type crude oil emulsion
  • Demulsification method of oil-in-water type crude oil emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Prepare a graphite oxide suspension with a concentration of 2 mg / mL with deionized water, and ultrasonically disperse for more than 90 minutes to obtain a graphene oxide dispersion, which is ready for use.

[0025] 40g of Tarim Basin crude oil and 360g of deionized water were respectively placed in plastic containers. The oil-water mixture was dispersed by a high-shear emulsifier at 28,000 rpm for 3 minutes to obtain a uniformly dispersed oil-in-water crude oil emulsion with an oil content of 10%. Take several demulsification reagent bottles and number them sequentially. Add an equal amount of emulsion to the demulsification reagent bottle, and let it stand for 30 minutes at room temperature.

[0026] Add different volumes of graphene oxide dispersion into the demulsification reagent bottle, shake evenly, let stand, observe and record the water phase, oil phase and interface conditions.

[0027] After standing for 60 minutes, refer to the standard analysis method desc...

Embodiment 2

[0032] Prepare a graphite oxide suspension with a concentration of 2 mg / mL with deionized water, and ultrasonically disperse for more than 90 minutes to obtain a graphene oxide dispersion, which is ready for use.

[0033] 20g of Tarim Basin crude oil and 380g of deionized water were placed in plastic containers. The oil-water mixture was dispersed by a high-shear emulsifier at 28,000 rpm for 3 minutes to obtain a uniformly dispersed oil-in-water crude oil emulsion with an oil content of 5%. Take several demulsification reagent bottles and number them sequentially. Add an equal amount of emulsion to the demulsification reagent bottle, and let it stand for 30 minutes at room temperature.

[0034] Add different volumes of graphene oxide dispersions into the demulsification reagent bottle and shake evenly. Stand still, observe and record the condition of water phase, oil phase and interface.

[0035] After standing for 60 minutes, refer to the standard analysis method described...

Embodiment 3

[0040] Prepare a graphite oxide suspension with a concentration of 2 mg / mL with deionized water, and ultrasonically disperse for more than 90 minutes to obtain a graphene oxide dispersion, which is ready for use.

[0041] 2g of Tarim Basin crude oil and 398g of deionized water were placed in plastic containers. The oil-water mixture was dispersed by a high-shear emulsifier at 28,000 rpm for 3 minutes to obtain a uniformly dispersed oil-in-water crude oil emulsion with an oil content of 0.5%. Take several demulsification reagent bottles and number them sequentially. Add an equal amount of emulsion to the demulsification reagent bottle, and let it stand for 30 minutes at room temperature.

[0042] Add different volumes of graphene oxide dispersions into the demulsification reagent bottle and shake evenly. Stand still, observe and record the condition of water phase, oil phase and interface.

[0043] After standing for 60 minutes, refer to the standard analysis method describe...

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Abstract

The invention discloses a demulsification method of an oil-in-water type crude oil emulsion. The method employs oxidized graphene as de-emulsifier to carry out dehydration treatment to the oil-in-water type crude oil emulsion at the room temperature. The de-oiling rate of the oil-in-water emulsion is more than 96%. The demulsification method of the invention can be applied to the dehydration treatment of oil-water emulsion with high water content in the petroleum industry.

Description

technical field [0001] The invention belongs to the treatment technology of produced fluid in crude oil exploitation, especially tertiary oil recovery, and in particular relates to a demulsification method for rapidly destroying oil-in-water emulsion in crude oil at normal temperature. Background technique [0002] In the process of crude oil production and processing, we all face this important link, that is, the dehydration treatment of oil-water emulsion, also known as demulsification. In the process of crude oil extraction, the oil-water emulsion is easily formed into a stable emulsion after being mechanically mixed by the injector and the gathering pipeline. Crude oil emulsion will greatly increase the storage and transportation burden and reduce the life of oil pipelines. In addition, in the process of refining crude oil, because the water contains a large amount of inorganic salts, it often leads to catalyst poisoning and severe corrosion of distillation equipment. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/06
Inventor 任嗣利刘娟
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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