Oil production systems in arctic regions are challenged by low temperature production. To enable normal gravity separation, a large amount of heating and chemicals are needed to lower the viscosity of the oil.
Vessel Internal Electrostatic Coalescer (VIEC) is a technology for enhancing liquid-liquid separation by using alternating high voltage electrical fields. With VIEC the inlet crude oil viscosity can be higher and significant savings can be made both on the heating demand and the size and quantity of separators needed.
By the use of a VIEC system, the oil separation system is much more robust. In addition to saved energy there will be a lower consumption of production chemicals. Recent arctic projects performed by Sulzer includes Goliat (the Barents Sea) and Hebron (Canada).
Vessel Internal Electrostatic Coalescer (VIEC) is a technology for enhancing liquid-liquid separation by using alternating high voltage electrical fields.
The modular construction consists of several electrodes, where each electrode is electrically insulated and has its own dedicated transformer for transforming a low voltage feed to high voltage. It tolerates 100% water and 100% gas without short circuiting or arcing, making it ideally suited for use in any three-phase separator to speed up the separation of water dispersed in oil and/or to resolve stable oil-continuous emulsions.
The VIEC can be installed in new separators or retrofitted into three-phase separators with any hot work. Significant savings can be made both on the demand of heating ,chemical and separators train design.