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Azeri, Chirag & Gunashli Full Field Development Phase 3 Environmental & Socio-economic Impact Assessment Final Report 5.5 Offshore Platform Production 5.5.1 Overview Offshore production consists of a number of operations that allow the safe and efficient production of hydrocarbons from the flowing wells. The key operations that will be conducted at the offshore platform include: Produced hydrocarbon separation; • • • • • • • Gas processing; Oil and gas export; Well testing; Produced water treatment and injection; Seawater lift for cooling duty and injection; and Utilities to support these processes. A simplified process flow diagram illustrating the principal offshore processes is presented in Figure 5.21. Figure 5.21 Offshore Production Process HP SepLP SepDehydrationFlash gasDeaerationBoosterSand andPlatform ExportPowerSubsea wellSW liftFuel gasInjectionCoalescersSangachalMOLBooster(2 trains)(2 trains)(single train)Compression(2 trains)Manifolds(2 trains)pumpsHydrocyclones(2 trains)wellInjectiondownholeGas to SangachalCompression(2 trains)Generationinjectiondownhole29 barg12 barg110 barg135 barg480 barg1 barapumpsLift gaspumps(3 trains)(2 trains)Oil topumpspumps225 mmscfd350 mmscfd316 mbpd131 mbpd750 mbpd The principal production processes and support utilities are described in more detail in the following sections. 31648-046 ACG Phase 3 ESIA Chapter 5 5/37 October 2004 Azeri, Chirag & Gunashli Full Field Development Phase 3 Environmental & Socio-economic Impact Assessment Final Report 5.5.2 Hydrocarbon Processing and Export 5.5.2.1 Separation Hydrocarbon flow from the producing wells will be received at either the High pressure (HP) or Low Pressure (LP) production manifolds on the DUQ platform and transferred to the two platform sepa...