The CTour Process
A typical single stage CTour Process includes the following steps:
- Harvest an appropriate condensate stream from a suction scrubber.
- Inject up to 2% (v/v) condensate in liquid form into the produced water stream (injection rates dependent on feed concentration).
- Upon on-line mixing, the hydrocarbon contaminants are extracted from the water into the condensate phase.
- The injected condensate is nearly 100% recovered from the water in a standard hydrocyclone.
- The condensate, which contains the contaminants, emerges through the hydrocyclone reject and is cycled back to the original production streams.
De-oiling of produced water in a hydrocyclone/degasser configuration yields an average discharge concentration of approximately 25 ppm in the norwegian sector of the North Sea. The CTour Process (single stage) will yield residual oil discharge of 2-3 ppm.
The CTour Process removes up to 90% of the following dissolved components from the water, dependent of the condensate purity:
- PAH (Poly Aromatic Hydrocarbons)
- NPD (Naphta Petroleum Derivates)
- Non methane VOC (Volatile Organic Components)
- BTEX (benzene, toluen, ethylbenzene, xylene)
- Phenols C2+
Only minor modifications to the standard process are necessary, provided that sufficient quantity of a gas-condensate, with the right properties, is available from a suction scrubber.
A typical retrofit installation of the CTour Process includes the following unit operations:
- Condensate processing and distribution unit
- Condensate injection system
- Hydrocyclone configuration
The design and configuration of these units is based on extensive development work and experience from field tests.
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