In literature, I find a lot of demulsification methods that can be grouped into 4 main categories; chemical demulsifier, mechanical (centrifugation, ultrasound, membrane), electrocoalescense, and heating. However, when it comes into practice, only few of them are being used in the OnG activity due to the practical visibility. Through this forum I would like to confirm about the demulsification method that is currently used in OnG industries. It will be a reference for me to develop a new demulsification method.