Gas Processing Unit Summary

Produced wellhead gas is wet, saturated with heavy hydrocarbons and contained with salt and sand.
Gas Conditioning Unit varies from a small station that handle 10 million SCFD to a big station that process 500 Million SCFD.

Wells scattered throughout the remote regions, and then carried by export line to the processing unit. Liquid are separated from gas. The liquids consist of salt water and condensate. The condensate is collected to oil refinery, where the condensate is blended into gasoline. The water is removed and then injected back into the ground in disposal wells.

The Logic Behind The Magic." Flash Gas Compression"

The condensate separated in the Liquid separator is stabilize by the condensate stabilization unit.
To recover the flash gas from the condensate stabilizer column and overhead of liquid separator, Flash gas compressor is installed for the compressing and recycling the gas to inlet of slug catcher.

Flash gas compressor is horizontal multistage cylinder balanced opposed type reciprocating compressor. These compressors are driven by 160 kW induction motor through a direct rigid coupling.

First, the gas flows to Flash Gas Compressor Scrubber to be scrubbed and condense any liquid from the gas stream.

The gas is then compressed by 1st stage flash gas compressor then the discharge gas cooled down from 116 deg C to 80 degC by 1st stage flash gas after cooler. After that condensed liquid is separated in the 2snd stage flash gas compressor suction scrubber prior compression by 2nd stage flash gas compressor to 48.5 barg. The compressed flash gas is cooled down to 90 degC by 2nd stage flash gas after cooler prior delivering to the slug catcher

The Logic Behind The Magic." Gas Dew Point Control and Metering 3".

Metering

The purpose of the flow metering system is to measure the gas flow for commercial purposes.
Sales gas metering package includes the dollowing:
- Flow Metering system
- Gas Chromatograph
- Miscellaneous component, like isolation valve, tube JB, etc.

One of the options is utilizing senior orifice meter. The flow meter is designed and constructed in accordance for AGA Report No 2. To compesate the flow readings, Pressure and Temperature transmitters are provided on each stream.

The Logic Behind The Magic." Gas Dew Point Control and Metering 3".

Gas Dew Point Control .

The Logic Behind The Magic." Gas Dew Point Control and Metering".

Dry gas from TEG overhead KO drum flows to Gas/Gas Exchanger where it is cooled by Low Temperature Separator overhead stream. The Gas/Gas Exchanger is a special Printed Circuit Heat Exchanger design. The exchanger is protected by strainers in order to avoid oversized particles entering Sales Gas Metering Skid.

The Logic Behind The Magic." Glycol Dehydration System 10"

Glycol Make Up System and Drain Vessel Control

The Logic Behind The Magic." Glycol Dehydration System 9"

Glycol Make Up System and Drain Vessel

Glycol from TEG drain vessel is pumped to TEG storage tank by  TEG Drain Vessel Pump in the drain vessel. The lean glycol in the storage tank is used to make up loss of glycol in the regeneration system. TEG is pumped from the TEG storage Tank to the TEG accumulator vessel by TEG Make up pump. The TEG make up pump operates intermittenly with design capacity 5.5 m3/hr.