Advantages of LEWA packages for the injection of demulsifiers:
Demulsifiers are compounds that dispersed in very small amounts into the emulsion during injection that diffuse into the oil-water interface and function as stabilizers. They have a multitude of action mechanisms:
Description of the demulsification process:
The demulsifier concentrates on the surface of the small water drops and "collects" them. The drops form an increasing concentration of water. The water drops which refract the light, are removed. The visible effect is the brightening of the oil layer. The water droplets finally combine and are separated.
Why is the demulsifier a mixture?
Demulsifiers normally offer a combination of effects as:
A single substance cannot offer these combined properties, thus commercial demulsifier mixtures consist of several substances.
The most widely used methods are demulsifier injection systems at the bore hole and at collection points.
Bore hole injection is recommended:
Considerable cost reduction due to demulsifying crude oil:
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