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PVT system for PVT studies & wax / asphaltene precipitation studies

The Fluid Eval PVT system performs hydrocarbon phase behavior studies at reservoir-representative conditions of pressure and temperature. The apparatus warrants excellent reliability on black oil, volatile oil and gas condensate samples. It can also be configured with an infrared laser-based solid detection system (SDS) and high pressure microscope (HPM) to enable a variety of asphaltene and wax solid deposition experiments. The system utilizes an embedded high pressure pump to control and monitor the fluid’s pressure and volume within the cell. A single cell is employed for both oil and gas condensates studies. For oil studies, the cell is in the upright position whereas for gas condensate studies, it is inverted to maximize the dew point detection efficiency. Cell rotation is achieved via a powerful motorized rocking mechanism. A video camera system continuously surveils the gas/liquid interface and measures the volume of retrograde condensate during gas condensate studies. A magnetically coupled stirrer mounted inside the sample chamber provides efficient fluid mixing and ensures fast thermos-physical equilibrium. Homogeneous sample heating is generated by a controlled temperature air bath which can also be configured to deliver sub-ambient temperatures down to -20°C.

APPLICATIONS:

  • Phase behavior studies for black and volatile oils, gas condensates and near-critical fluids                    
  • Measure live fluid asphaltene precipitation onset and wax appearance temperature using laser-based solid detection system (SDS) and high pressure microscope (HPM)

FEATURES: 

Cell volume : 500 cc (standard Fluid Eval model) 
                        1,000 cc (maxi Fluid Eval model) 
Pressure : 15,000 psi
Temperature : Ambient to 200°C (option: -20°C)
Temperature regulation : ± 0.5 °C
Volume accuracy : 0.01 ml
Pressure accuracy : 0.1% Full scale
Liquid deposit accuracy : ± 0.01 ml
Power supply : 220 VAC, 50/60 Hz

BENEFITS:

  • Versatile design
  • Mercury free operation
  • Large cell volume for representative sample studies
  • 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
  • Motorized rocking system for cell positioning
  • Sub-ambient temperature control
  • Add-on modules for solid detection, viscosity and density measurement

Video presentation of the standard Fluid-Eval




Figure 1: Standard Fluid Eval system