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Produced fluid dewatering demulsifier for accumulating and repelling crude oil

A technology of dehydration and demulsification of crude oil, which is applied in the direction of dehydration/demulsification by chemical methods, and can solve the problem that the oil content of sewage cannot meet the discharge standard

Active Publication Date: 2006-09-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Overcome the problem that the existing demulsifiers can only achieve crude oil dehydration and water content up to 1.0% qualified oil standard, and the oil content of sewage cannot meet the discharge standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] In this example, the raw materials used are all industrial grades, and the addition ratios are all weight percentages.

[0024] One, the preparation of A surfactant

[0025] Put the 13.2% perfluorooctane sulfonyl fluoride initiator for the preparation of the intermediate PEA in a 1500L stainless steel reactor, start stirring, raise the temperature to 120±5°C, evacuate, fill with nitrogen, and slowly add 86.8% epoxy Ethane, the reaction pressure is controlled at 0.2-0.4MPa, after the dropwise addition is completed, after the pressure in the reactor returns to zero, the temperature is lowered and the material is discharged to obtain the intermediate PEA.

[0026] Put 52.3% intermediate PEA and 0.13% potassium hydroxide for the preparation of A surfactant in a 1500L stainless steel reaction kettle, start stirring, heat up to 130±5°C, evacuate, fill with nitrogen, and slowly add 47.57% epoxy Propane, the reaction pressure is controlled at 0.2-0.4MPa, after the dropwise add...

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PUM

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Abstract

This invention discloses a method for manufacturing a demulsifier for crude petroleum dehydration, which comprises the steps of: manufacturing three kinds of surfactants, stirring the surfactants in an enamel mixer, heating, dropping methanol and water into the mixer, and cooling to obtain the demulsifier. The demulsifier has a high dehydration effect, and after dehydration the content of water in the crude petroleum is less than 0.2%, while the content of petroleum in the wastewater is less than 50 mg / L.

Description

Technical field [0001] The invention relates to a demulsifier for polymer flooding crude oil dehydration and a preparation method of the demulsifier for polymer flooding crude oil. Background technique [0002] In order to meet the standard of high-quality oil for export after dehydration of crude oil, meet the standard of sewage after dehydration, and reduce the cost of demulsification and dehydration of crude oil, technicians have developed many types of demulsifiers for on-site technical problems. Many crude oil demulsification and dehydration problems have been solved, but some technical problems have been ignored. For example, after the production fluid containing polymer is demulsified and dehydrated, the oil content in the sewage is high, how should it be solved. [0003] In order to improve the sweep coefficient of the oil layer in the late stage of oilfield development, some recoverable reserves can be obtained, and the oil recovery rate can be improved. Productio...

Claims

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Application Information

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IPC IPC(8): C10G33/04
Inventor 付亚荣蔡远红刘建华申玉健
Owner PETROCHINA CO LTD
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