High-temperature sewage treatment reverse demulsifier of ultra-heavy oil

Abstract

The invention discloses a high-temperature sewage treatment reverse demulsifier of ultra-heavy oil. The method comprises the following steps of preparing chlorinated polyether by taking propanetriol and epichlorohydrin as materials and boron trifluoride ether solution as an initiator; preparing cationic poly ether by placing the chlorinated polyether and trimethylamine in a high-pressure reactor; by taking carbinol as a solvent, and boron trifluoride diethyl etherate as the initiator, repeatedly and alternatively carrying out Michael addition reaction and amidation by ethanediamine, methyl acrylate and the like to prepare 3.0-generation dendritic macromolecule polyamide-amine; by taking polyethylene glycol and poly propylene glycol as materials, and potassium hydroxide powder as a catalyst, adding polypropylene glycol to prepare non-ionic polyether after the polyethylene glycol reacts a period of time; finally by taking 3.0-generation polyamide-amine as a cross-linking agent, preparing the modified composite polyamide-amine-polyether high-temperature sewage treatment reverse demulsifier of the ultra-heavy oil by compounding cationic polyether and non-ionic polyether.

Description

technical field [0001] The invention relates to the technical field of petrochemical treatment agents, and the provided inverse demulsifier is especially suitable for the treatment of ultra-heavy oil high-temperature sewage. Background technique [0002] The important feature of super heavy oil that is different from other types of petroleum resources is that it has high asphaltene and colloid content, resulting in high viscosity and high density. Super heavy oil is mostly exploited by steam thermal recovery, and the high temperature produced fluid has the following characteristics: (1) Ultra-heavy oil has high density. Due to the high content of colloid and asphaltene, the density difference between crude oil and water is small, and the average density of heavy oil is 900kg / m 3 , the density of super heavy oil is 990kg / m 3 (2) Super heavy oil production fluid has more impurities, oil content and suspended solids content are as high as 10000mg / L, and contains petroleum, sus...

AI Technical Summary

Problems solved by technology

[0004] At present, there are many kinds of inverse demulsifiers, which are highly targeted, mainly including inorganic polymer compounds and organic cationic polymers. However, when applied to the inverse demulsification of super heavy oil production fluid, the effect is not good. Ideal, with the increasingly complex water quality of ultra-heavy oil high-temperature sewage, the high-temperature sewage has changed from the W / O type at the initial stage of development to the O / W type or W / O / W type. The oil-water emulsification stability is extremely strong, and the traditional reverse phase Demulsifiers have been difficult to meet the requirements, so the development of super heavy oil high temperature production fluid inverse demulsifiers with high temperature resistance and excellent performance is particularly urgent

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