Application of water-soluble demulsifier in oilfield

Demulsifier is a chemical substance that can destroy and disperse the oil-water emulsion, separating it into two phases. Demulsifier, this chemical additive is not unfamiliar in the oilfield industry, it can destroy and disperse the oil-water emulsion, and separate it into two phases of oil and water, mainly used to solve the emulsion problem in the oil well production fluid, improve the efficiency of oil-water separation, thereby increasing the production of crude oil.

The use of demulsifier can be achieved in different ways, and suitable methods and equipment can be selected in different stages and links:

Water-soluble demulsifier is mainly used in water-based settling tanks or centrifuges. By adding an appropriate amount of demulsifier, it can promote oil-water separation and improve the output and quality of oil.

Oil-soluble demulsifier, usually used in oil Wells or oil pipelines, quickly breaks down the oil-water emulsion by mixing and stirring, making the separation of oil and water more thorough.

Among them, water-soluble demulsifier is widely used in oil fields, which has the advantages of environmental friendliness, easy handling and use, more environmental protection and cost.

1. Emulsion breaking in the production liquid: the production liquid in the oilfield often contains emulsion, which aggravates the difficulty of oil-water separation due to the action of emulsifier. The use of water-based demulsifier can destroy the emulsification of the emulsifier, make the emulsion separate, and increase the oil well production.

2. Emulsion treatment in the sedimentation tank: In the sedimentation tank, the solid particles cannot settle due to the formation of an emulsion by the oil-bearing suspension in the water injection solution. The application of water-based demulsifier can destroy the emulsification of the emulsifier and separate the oil-bearing suspension, thus improving the sedimentation efficiency of the solid particles.

3. Demulsification in crude oil treatment: In the process of crude oil treatment, it is often accompanied by the existence of emulsion, which affects the separation effect and subsequent treatment. By adding water-based demulsifier, the structure of emulsion can be destroyed, and the crude oil and water can be separated, which is convenient for subsequent treatment steps.

4. Demulsification in the water drive process: In the water drive process, the injected water contains different degrees of emulsion, which affects the displacement efficiency. Using water-based demulsifier can quickly destroy the emulsion structure, improve the displacement effect and increase the oil recovery rate.

Oil-soluble demulsifier refers to the demulsifier that can be dissolved in the oil phase and can be directly mixed with the oil in the emulsion to achieve the demulsifier effect. This demulsifier has good demulsification effect and adaptability, and is suitable for various types of oil-water emulsions, including high concentration emulsions.

Water-soluble demulsifiers can also be used in some special cases in the oil production process, such as processing low concentration emulsions or in the separation process with oil-soluble demulsifiers. The specific type of demulsifier chosen depends on the characteristics of the emulsion, the demulsification effect requirements and economic costs.