Reservoir Fluids Phase Behavior And PVT Analysis


  • Quality check of downhole samples
  • Opening pressure measurement
  • Constant Volume Depletion (CVD) study
  • Reservoir fluid flash from reservoir pressure to ambient laboratory conditions
  • Determination of the produced GOR, FVF and effluent specific gravities
  • Calculating mathematically recombined reservoir fluid composition through C7
  • Sample transfer at reservoir conditions from the sample transport cylinder to PVT cell
  • Constant Composition Expansion (CCE) of the Reservoir Fluid
  • Determine the Bubble Point (BP) pressure, oil density and compressibility above the BP, and Y function below the BP and the relative volume at all pressures
  • CVD of the reservoir fluid at reservoir temperature and at pressures between the dew point pressure and the abandonment pressure
  • Compositional analysis of the evolved gas (C11+) and oil (C31+) resulting from the reservoir fluid flash to ambient conditions
  • Determination of:
    • Wellstream composition through C7+
    • Equilibrium and two phase Z Factor
    • Reservoir oil viscosity measurements
    • Flash liberation tests from the bubble point pressure to specified pressures and room temperature.

Fluid Laboratory Services


Research-quality fluid- property measurements with expert interpretations.

Advanced Studies in: Real- world reservoir conditions- up to 480 ̊ and 20,000 psi pressure.



Equipment: Mobile PVT system for field PVT tests

The mobile Fluid Eval PVT system is designed to perform PVT tests on reservoir fluids at the field location.



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PVT Tests:


  • Constant Mass Expansion (i.e. CME)
  • Diferential Vaporisation (i.e. DV)
  • Flash separator
  • Constant Mass Depletion (i.e. CMD)
  • Constant Volume Depletion (i.e. CMD)



  • Pressure: 15,000 PSI
  • Temperature: Ambient to 175°С (350 °F)
  • Temperature regulation: ± 0.5°С
  • Cell volume: 100 cc with 10 cc visual
  • Volume accuracy: 0.01 ml
  • Pressure accuracy: 0.1% Full scale
  • Power supply: 220 VAC 50/60 Hz



  • Mobile and transportable
  • Versatile design
  • Mercury free operation
  • Touch screen panel for easy operation
  • Automated phase detection and phase volume measurement
  • Embedded pump for precise pressure control and volume measurement
  • Video camera system for recording PVT experiments in real-time
  • Magnetic driven stirrer for rapid phase equilibrium