Reducing and eliminating flare in Marmul field

The objective of this project is to eliminate permanent flaring and provide a sink for associated gas from the Main Marmul Production Station (MMPS) bulk separators (approximately 210,000 sm³/d), which is currently supplied to Marmul Power Station.

The associated gas from MMPS, with an H2S level of ~690 ppmv, is compressed and sent as export gas to Marmul Power Station, Marmul-A station, a water treatment plant (WTP), and Qaharir and Thuleilat stations. The high-H2S flash gas from the MMPS tanks is currently flared via the Gas Recovery Compressor (GRC) K-2412 to prevent contamination of the MMPS gas system. This is necessary due to the incompatibility of the power plant with sour gas.

Marmul Power Station, nearing the end of its design life, is planned for retirement starting in Q2 2022. After its closure, there will be no route for evacuating MMPS export gas.

To address this, associated gas from production separators will be mixed with high-H2S flash gas recovered from various tanks via a new Gas Recovery System. The combined gas will be treated in the Gas Sweetening Unit (GSU) using Thiopaq Technology. The sweet gas will be compressed, dehydrated, and sent to the South Oman Gas Line (SOGL).

Condensate from the new facility will be stabilized in a new Condensate Stabilizer Unit (CSU) before being routed to the MOL pump suction. Off-gas from the CSU and the condensate flash vessel will be routed to existing fired heaters for fuel gas use. Excess gas will be routed to the flare and managed under the separate "MMPS Excess Flare Gas Recovery Project".

The project will also include utilities such as an instrument air system, nitrogen generation, and flare system rationalization.