Full visibility PVT cell
Our PVT cell is a state of the art instrument for oil and gas analysis of downhole samples.
As a standalone instrument or combined with auxiliary equipment, it can perform the most complex tasks and deliver outstanding results.
Its adaptability makes it suitable for gas as well as fluid analysis without any modification. Great care has been taken throughout the design phase to maximize quality of the measure and increase repeatability by automation to minimize uncertainty and maximize accuracy of reservoir measurements.
Measurements
Our PVT cell with accessories is designed to perform:
- A complete PVT study on oil and volatile oil (may requires viscometer) including:
– Bubble point determination
– Composition Flash
– Constant Composition Expansion at constant temperature
– Differential vaporization at constant temperature
– Separation tests (several stages at different temperatures)
– Viscosity measurement - A complete PVT study on gas condensate (may requires GOR apparatus):
– Dew point determination
– Constant mass depletion
– Constant volume depletion - A recombination of separator oil or condensate and separator gas under reservoir conditions
- Liquid / solid equilibrium (for wax, asphalts, hydrates)
- An analysis of viscosity, density, composition (accessories available as an option)
- Compressibility factor determination (Z factor)
- Dew point and bubble point determination
- Gas in Oil Ratio (requires GOR apparatus)
Control
The PVT cell is controlled via a human/machine interface developed on Labview. It provides control over the PVT cell and gas meter on a single screen.
The interface displays valve and sensor statuses, transducers measurement and provide a graphical display of the cell and gasmeter.
The interface has automated sequence for the following tests:
- Recombination of separator oil or condensate and separator gas under reservoir conditions
- Compressibility factor determination (Z factor)
- Dew point and bubble point determination
Further test sequence could be added, depending on the customer available equipment. Pressure sensor calibration will be done automatically thanks to the reference pressure sensor integrated in both instruments.
The interface also provides manual control·over the following components:
- Shear valve (open /close / position)
- Semi-automated valves (open / close)
- Motor, controlled by flow setpoint, pressure setpoint (with or without ramp), or pressure regulation
- Tilting motor (position / cycle)
Full laboratory automation and custom equipment integration is also possible provided that communication protocols of third party equipment are compatible with our equipment.
Cell
The design of the cell is such that dead volumes are reduced to their minimum, increasing the accuracy of the results provided by the instrument, and removing the risk of sample cross-contamination from previous studies.
The cell will be equipped with a high pressure, high transparency, sapphire window. The sapphire window will be fully polished to allow the camera to capture every possible detail.
