The function of surfactant is to emulsify

2022-11-30 16:34:21

Mechanism and application of surfactants in tertiary oil recovery.

1) Active water flooding. It is the only way to inject a surfactant aqueous solution into the oil layer. The function of the surfactant aqueous solution is: a) to reduce the dispersion of crude oil in water; b to change the wettability of the formation surface; c to increase the dispersion of crude oil in water; d Change the fluidity of crude oil, reduce the maturity and ultimate shear stress of crude oil.

2) Alkaline water flooding. Alkaline water flooding is a method of making naphthenic acid in crude oil react with alkali to form soap surfactant. This oil recovery method is low in cost, but it is generally more effective to add some co-surfactants.

3) Thickened water flooding. Using a thickener to enhance oil recovery, partially hydrolyzed polyacrylamide can be used as a thickener for injection water, and sometimes a mixture of fatty alcohol polyoxyethylene ether sulfate or sulfonate and a surfactant is used as a thickener.

Emulsifier is a kind of surfactant. The function of surfactant is to emulsify, and there are others. The main functions of surfactant are: stain removal, emulsification, solubilization, suspension, foaming and defoaming, There are many kinds of surfactants such as sterilization. According to the classification of use, there are emulsifiers, demulsifiers, antistatic agents, detergents, foam stabilizers, defoamers, and dispersants. These uses can be distinguished according to the magnitude of the HLB value. Wide range of surfactants, including emulsifiers. The HLB value of the surfactant is between 0-40, and the emulsifier is between 2-15, 2-8 is a water-in-oil emulsifier, and 9-15 is an oil-in-water emulsifier.

A surfactant is a substance that contains a hydrophilic group and a hydrophobic group. Surfactant refers to a substance that has fixed hydrophilic and lipophilic groups, can be aligned on the surface of the solution, and can significantly reduce the surface tension. Emulsifier is only one kind of surfactant, or it can be said to be a kind of performance. Emulsifier can also be used as penetrating agent.