Types of analyses covered



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PVT high-pressure cell
This mercury-free cell can determine the phase behavior of hydrocarbons at reservoir conditions up to 15000 psig and 350° F. The process of running the analysis and the data acquisition are fully automated and pump flow rates, cell pressures, temperatures, stirrer speed and other parameters are computer controlled and monitored. The embedded video system allows for very accurate visualizing of bubble points, dew points and oil/gas interface. The cell can be fitted with two different types of heads, for oils and for condensates. The equipment can be rotated 180 degrees, thus enabling the precise determination of bubble points (in the upward position) and dew points (in the upside down position).
GOR equipment
The live fluid sample is flashed to atmospheric conditions in a controlled environment, with gas volumes measured with a gas meter and dead oil by the gravity technique. The gas is re-circulated through the sample and the gas pycnometer. This circulation allows us to get a good 2-phase sample equilibration at ambient pressure.
Separator equipment
This is used for the flashing of reservoir fluids at different pressure and temperature stages. The single-phase liquid coming from the live oil cell is released into the separator and the temperature of the separator is regulated by the thermostatic bath. The liquid fraction is measured through the graded glass tube. The backpressure valve can adjust the pressure inside the separator and a gas meter measures the released gas volume. A pressure gauge mounted on the gas line measures the gas pressures.
Digital densitometer
This is a HP/HT cell capable of measuring live reservoir fluid densities at temperatures from –100°C to 200°C and pressures up to 15000 psig. The system consists of a High Pressure Module measuring cell, an interface module and the evaluation unit. The measuring cell is filled with a sample at the desired pressure and heated to the desired temperature by the thermostatic bath fluid. The interface module generates a period of oscillation, and it measures the period of harmonic oscillation of the built-in U-tube and the cell temperature. The period of oscillation is then converted into the density of the sample by the evaluation unit.
Electromagnetic viscometer
This measures the viscosity of a reservoir fluid above and below the saturation pressure up to values of 10,000 cP. The piston-style viscometer uses two coils to generate an electromagnetic field inside a stainless steel sensor. A measurement chamber is filled with the fluid to be analyzed and the piston is forced back and forth by the electromagnetic field through the fluid. The piston round-trip travel time is measured and the time required for the piston to complete a two-way cycle is directly related to the viscosity of the fluid. The apparatus subsequently determines the value of absolute viscosity as a function of the resistance of a fluid to flow. The equipment also records the temperature and calculates a TCV (temperature compensated viscosity) at a reference temperature different from the actual temperature. The data can be viewed, stored and interpreted in real-time using the computer hyper terminal interface.
Compositional Analyzer
The chromatographs are of PR2100 type, manufactured by Perichrome France. The method used is GPA 2286. The Gas Analyzer is a 2 channel GC, one channel consisting of two columns porapack and molecular sieve and a TCD detector, the other channel is equipped with a PONA (capillary column) and a FID channel. Injection is done by switching one or both injection valves through activating relays. Time programs are built in to automatically run these actions and to control the temperature of the oven. The pressure control is achieved through an electronic controller (EPC). All the above programs and parameters are stored in the GC package. The Oil analyzer is a 1 channel GC, fitted with a capillary column and a FID detector, as well as with an automatic liquid sampler for batch processing of samples. The injector can work in both split and splitless modes.
Recombination cell
The recombination apparatus is used to physically combine gas and liquid samples at reservoir conditions of pressure and temperature. With the use of a positive displacement pump, the pre-calculated volumes of liquid and gaseous phases are injected into the HP, HT recombination cell. When transferred into the recombination cell, the fluids are stirred together, heated to the desired temperature and pressurized to a pressure above the bubble point for few hours to give a homogeneous mixture of the reservoir fluid. The recombined sample is transferred into a sample bottle. The temperature of the sample fluid is adjusted with the temperature controller and the pressure of the sample fluid is set via an external volumetric pump facility driving displacement oil.

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