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Fast emulsion breaking method

A demulsification and fast technology, applied in the field of demulsification of water-in-oil emulsions, can solve the problems of limited effective area of ​​demulsification and insufficient uniformity

Inactive Publication Date: 2008-02-13
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The emergence of the microwave demulsification method has partially solved this problem, especially for heavy oil and high salinity, small oil-water relative density difference, and viscous polymer well fluids. However, the effective area of ​​microwave demulsification is limited. , the disadvantage of not being uniform enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056]Get 100g emulsified crude oil (water content 80%, source Shengli Oilfield), pack in the container, be 1: 1 * 10 by the mass portion ratio of water and demulsifier respectively -4 , 1:2×10 -4 , 1:3×10 -4 1. Add demulsifiers AE-121 and SP-169, oscillate to dissolve the demulsifier completely, then place it in a microwave generator with a frequency of 2450MHz and a power of 850W, and record the complete demulsification time. The results are shown in Table 4. The control example is without demulsifier.

[0057] Table 4

[0058] Dosage

Embodiment 2

[0060] Get 100g emulsified crude oil (water content 75%, source Shengli Oil Field), pack in the container, be 1: 0.5 * 10 by the mass ratio of water and demulsifier respectively -4 , 1:1.5×10 -4 , 1:5×10 -4 , add demulsifiers AE-121 and SP-169, oscillate to dissolve the demulsifier completely, and then place it in a microwave generator with a frequency of 2450MHz and a power of 850W, and record the complete demulsification time. The results are shown in Table 5. The control example is without demulsifier.

[0061] table 5

[0062] Dosage

Embodiment 3

[0064] Get 100g emulsified crude oil (water content 65%, source Shengli Oil Field), pack in the container, be 1: 0.8 * 10 by the mass ratio of water and demulsifier respectively -4 , 1:2.5×10 -4 , 1:3.5×10 -4 1. Add demulsifiers AE-121 and SP-169, oscillate to dissolve the demulsifier completely, then place it in a microwave generator with a frequency of 2450MHz and a power of 850W, and record the complete demulsification time. The results are shown in Table 6. The control example is without demulsifier.

[0065] Table 6

[0066] Dosage

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Abstract

The invention relates to a rapid emulsion breaking method, including microwave radiation. Emulsion breaker is added according to the water content of the rolly oil (calculated by weight percent), the mass ratio of the water and emulsion breaker is 1:0.5*10-4 to 5*10-4, and microwave is adopted for emulsion breaking. The emulsion breaker is one or more than two types of mixtures of polyamine polyoxy-propylene polyoxyethylene ether, resin polyoxy-propylene polyoxyethylene ether, higher-alcohol initiator emulsion breaker or propylene glvcol emulsion breaker. The microwave radiation and microwave radiation frequency are 2450MHz or 915MHz. Under the synergistic reaction, water-in-oil emulsion liquid is broken within a relatively short period, a bigger anhydration rate is achieved, and the emulsion-breaking efficiency is improved. In the circumstance of a little emulsion breaker, microwave radiation breaking method can be adopted, and the emulsion breaking speed is increased by 1-2 orders of magnitude compared with the traditional emulsion breaking by heating. The method is easy to implement, energy efficient, rapid in emulsion breaking, and the emulsion breaking effect is good.

Description

Technical field: [0001] The invention relates to a method for demulsifying emulsions, in particular to a method for demulsifying water-in-oil emulsions. Background technique: [0002] Crude oil dehydration has always been one of the most important links in oil extraction and processing. The existence of oil-water emulsion will increase the burden of oil and gas storage and transportation, and easily cause pipeline corrosion, which is not good for oil processing and utilization. In order for production to proceed properly, these emulsions must be processed to achieve oil-water separation. The key to crude oil dehydration is the demulsification of crude oil emulsion. [0003] The current demulsification methods mainly include: 1. Sedimentation method; 2. Heating or distillation under normal pressure; 3. Heating or distillation under high pressure; 4. Electricity; 5. Chemistry; 6. Centrifugation; 7. Filtration; 8. ultrasound. Chemical demulsification is mostly used in China...

Claims

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Application Information

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IPC IPC(8): C10G33/00B01D17/04
Inventor 夏立新宫科
Owner LIAONING UNIVERSITY
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