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Modernization of two hydrocarbon plants in Oman

Saih Rawl central processing plant.

Saih Rawl central processing plant.

The turnkey contract (EPC) that SENER is carrying out in an horizontal consortium to modernize two hydrocarbon plants of Petroleum Development Oman LLC (PDO) - the foremost exploration and production company in the Sultanate of Oman, and a reference company worldwide in the Oil&Gas market - will allow PDO to maximize the recovery of hydrocarbon condensates present in natural gas that is extracted from the wells.

The plants which will be modernized are the Saih Rawl Central Processing Plant (SRCPP) and Saih Nahida Gas Plant (SNGP), located in the central part of the country, in the Omani desert, near the city of Qarn Alam, 35 km from one another.

At the Saih Rawl Central processing plant, the condensate recovery maximization unit will consist of 1 x 100% External Mechanical Refrigeration (EMR) unit along with a propane chiller installed in each gas train within the Central Processing Plant (CPP) upstream the Triethylene glycol (TEG) Inlet Scrubber. The EMR unit capacity was optimized using production forecast, air cooler outlet temperature and mixing temperature prior to TEG Inlet Scrubber. The EMR will have a capacity to process a sales gas export flow rate of 43 MMSCMD (million metric standard cubic meter per day) distributed equally in two CPP gas trains i.e. 21.5 / 21.5 MMSCMD through each train. The condensate recovery is mainly accomplished by lowering the cricondentherm temperature (0 °C) of the sales gas.

At the Saih Nahida gas plant, the condensate recovery maximization facility will have a new wet gas/dry gas heat exchanger, replacing an existing one, and a 1 x 100% booster compressor package. The condensate recovery is accomplished by lowering the cricondentherm temperature to 0 ºC via extra cooling in the new heat exchanger, and further expansion in the turbo-expanders. The booster compressor package is added in order to compensate for the extra pressure loss in the turbo-expanders, and to maintain the export gas pressure. This plant, after the Condensate Recovery Maximization (CRM) upgrade modifications, was optimized based on a maximum export gas flow of 25 MMSCMD. 

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Saih Nahida gas plant

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