Show oil production, Mechanical Engineering

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Q. Show Oil production?

Bitumen emulsion from field enters into the CPF emulsion inlet header. Depending on the emulsion temperature it may be cooled through two series exchangers, Inlet Emulsion Cooler by cross exchanger with BFW, then Inlet Emulsion Trim Cooler using glycol as the cooling medium. Diluent is added to bitumen to reduce density and viscosity to assist oil-water gravity separation. Demulsifier and reverse-demulsifier are also added to improve the separation quality.

A typical oil-treating unit consists of FWKO, Treater, Dilbit Cooler and a set of PW coolers. Dilbit downstream from the Dilbit Coolers recombines into a single stream and is sent to the Dilbit Tanks.

The FWKO temperature is maintained around 140°C to prevent diluent from flashing. The FWKO reduces the water cut of the production liquids down to 30% by gravity separation. The Dilbit is then transferred to the Treater, where the water cut is further reduced to less than 0.5% by gravity separation. The Dilbit is then cooled down to 50°C for safe storage as well as meeting the sales temperature specification.

Emulsions are intermittently drained from various sources in the CPF. The Slop Tank provides hold-up time to allow free water to separate from emulsion in order to minimize the liquid volume sent to the Slop Treater Package. Slop Tank is equipped with a gas blanketing system and is connected to the VRU system to avoid sour gas venting. The Slop Treater Package is intended to operate intermittently when emulsion is drained from the Slop Tank. It is designed to treat emulsion with 10-50% water cut and a feed temperature of 65°C. Recovered HC is pumped to the FWKO. Slop water is pumped into the Surge Tank.


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