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Dewatering demulsifier for triple composite driven extract and its production method

A ternary compound and demulsifier technology, which is applied in the fields of hydrocarbon oil dehydration/demulsification, petroleum industry, etc., can solve the problem that the oil content of sewage does not meet the discharge standard, etc.

Active Publication Date: 2010-07-21
PETROCHINA CO LTD
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  • Summary
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  • 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] 1. Preparation of AE Surfactant

[0025] First, add 35% triethylenetetramine and 0.15% potassium hydroxide to the reaction kettle, heat up to 100°C, vacuumize and dehydrate for 30 minutes; then slowly add 18% ethylene oxide dropwise, the reaction pressure is 0.2-0.35MPa, The reaction temperature is 125±5℃; then slowly add 19% propylene oxide dropwise, the reaction pressure is 0.2~0.4MPa, the reaction temperature is 135±5℃; then slowly add 15% propylene oxide dropwise, the reaction pressure is 0.2~0.4MPa, the reaction The temperature is 135±5°C; finally, slowly add 12.75% ethylene oxide dropwise, the reaction pressure is 0.2-0.35MPa, and the reaction temperature is 125±5°C; balance reaction for 1 hour, add 0.1% acetic acid for neutralization, vacuum treatment, cooling down, AE surfactant is obtained.

[0026] Two, the preparation of SP surfact...

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PUM

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Abstract

A triple composite-driven extract dewatering demulsifier and its production are disclosed. The demulsifier consists of drier 45-65wt%, water 30-45wt% and methanol 5-10wt%; drier consists of AE surface activator 15-30wt%, SP surface activator 10-40wt%, AT surface activator 15-35wt%, epoxy chloropropane 5-8wt%, which are synthesized by caustic potash, epoxypropane, triethenoid tetrammine, epoxyethane and acetic acid. The additive amount is between 80-100mg / 1 and water content is<0.2%, oil content is<500mg / 1. It has better demusifying effect.

Description

technical field [0001] The invention relates to the technical field of oil recovery in oilfields, and relates to a preparation method for a three-element compound flooding production fluid dehydration demulsifier and an three-element compound flooding production fluid demulsifier. Background technique [0002] In order to improve the sweep coefficient of oil layers in heavy oil fields, obtain some recoverable reserves, and improve oil recovery, some oil fields have adopted the method of ASP flooding to recover oil. This causes the production fluid to contain a part of alkali and surfactant. The amount of demulsifier for dehydration of oilfield production fluid is 400mg / l, and when the dehydration temperature is 60°C, the relative dehydration rate is only 40%, resulting in high water content in crude oil and high oil content in sewage after dehydration of production fluid. Contents of the invention [0003] The object of the present invention is: provide a kind of dehydrat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G33/00
Inventor 付丽霞付亚荣李冬青田炜马永忠吴泽美刘建华蔡远红
Owner PETROCHINA CO LTD
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