## Sizing Horizontal Three Phase Separator

In this post I want to share how to size horizontal three phase separator. The steps used in this post were from Surface Production Operations by Ken Arnold & Maurice Steward. You can learn the details and equations used from the book. In the end of this post, I share free spreadsheet on how to size horizontal three phase separator.

The calculation used in the spreadsheet in for preliminary calculation only. As for fabrication, you may need to discuss more with related vendors and EPC constructors.

### Required Data for Horizontal Three Phase Separator Sizing

To size horizontal three phase separator, we need the following data:

• Oil rate, water rate, and gas rate
• Operating pressure and operating temperature
• Properties (density, viscosity) of oil and gas, respectively
• Retention time of oil and water, respectively
• Droplet size of liquid and oil to be removed

## Preliminary Sizing of Two-Phase Horizontal Separator

Separator is the initial processing vessel in any production facility. Therefore, it should be designed properly to prevent reduction of capacity of the entire facility.

Separators are classified into two-phase and three-phase separator. Two-phase separators are used to separate gas from the total liquid stream. Meanwhile, three-phase separators are used to separate gas from crude oil and water component.

Separators are designed in either horizontal, vertical, or spherical configuration. In this post, I want to share to you how to size two-phase horizontal separator.

Schematic of Two-Phase Horizontal Separator

Figure below is schematic drawing of two-phase horizontal separator.