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The unit is intended for filtration-volumetric and electrical core sample properties at reservoir conditions with stationary and non-stationary filtration.
Basic configuration of the unit presupposes generation of a two-phase flow (liquid/liquid) through core samples. The PIK-OFP/EP can run automatically and in manual modes.
The system allows to perform both standard and purpose-designed experiments. Pore fluid filtration can be carried out both directly and in reversed direction. |
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| Capabilities |
The PIK-OFP/EP complex allows to determine the following parameters of a core:
- two-phase relative core conductivity for the flow components "liquid/liquid" in compliance with OST 39-235-89
- residual oil saturation
- electrical resistance
- open porosity coefficient at reservoir conditions
- displacement efficiency
- coefficient variation of open porosity depending on changes at reservoir conditions
| Technical specifications |
Technical specifications of the hydraulic system:
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Maximum confining pressure
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up to 69 MPa
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| Maximum pore pressure |
up to 40 MPa
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| Operating environments of hydraulic systems |
water with mineralization – to 300 g/l
oil
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Material type of the parts in contact with fluids
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stainless steel |
Technical specifications of the pumps:
| System of the confining pressure maintenance |
single-plunger pump/pneumo-hydraulic amplifier
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Regime of rock pressure pump
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steady pressure maintenance |
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Accuracy of pressure maintenance
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0,5% (of the full scale)
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Reservoir pumps of liquid supply
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2 pcs (for oil and saline solution)
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| Type of reservoir pumps | Double-plunger |
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Operating modes of reservoir-type pumps
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- steady consumption maintenance
- steady pressure maintenance
- maintenance of the specified proportion with the two-phase fluid filtration through a core sample from 0 to 100%
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| Consumption |
0,001¸20 ml/min
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| Cylinder volume |
20 ml
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| Accuracy of pressure maintenance |
0,5% (of the full scale)
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Accuracy of consumption maintenance
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0,5 % (of the current value)
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Technical specifications of temperature maintenance system:
| Type |
Heating cabinet/heat-stable volume + solo heaters
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| Temperature |
to 150°C
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| Heated elements |
core holder, delivery pipes, separating vessels
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Basic error of temperature measuring, not over
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±1 °С
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Technical specifications of a differential pressure system:
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Sensor 1. Upper range limit of measurement
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1,6 MPa
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Sensor 2. Upper range limit of measurement
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250 kPa
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Measurement error, not over
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±0,1 %
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Technical specifications of liquid output volume measuring system:
| Volume of a separator gauger |
200 ml
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| Discreteness |
0,1 ml
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| Material type of the parts in contact with fluids | Stainless steel |
Technical specifications of separating vessels :
| Type | with a dividing piston |
| Volume |
500 ml
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| Pressure |
up to 40 MPa
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| Temperature |
up to 150°C
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| Material type of the parts in contact with fluids | Stainless steel |
Technical specifications of back pressure regulating valve :
| Pressure |
40 MPa
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| Control |
Automated, contact with PC
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Material type of the parts in contact with fluids
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Stainless steel |
Technical specifications of electrical resistance measuring module :
| Type |
Digital resistivity meter for resistance measurement
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| Frequency |
1 kHz
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| Error |
0,05 %
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Technical specifications of a core holder for a core with a 30mm diameter:
| Core diameter |
30 mm (other dimensions upon the request)
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Length of a core sample column
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up to 150mm (other dimensions upon the request)
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| Rock pressure |
70 MPa
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| Pore pressure |
40 MPa
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| Temperature |
to 150 °С
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Resistivity control of saturation
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by four-electrode scheme |
| Material type of the parts in contact with fluids | Stainless steel |
Technical specifications of the control and managing system on the basis of PC
| Control |
Pump output, temperature, back pressure regulating valve
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| Data acquisition |
Digital pressure recorders / differential pressure recorders, pump output, temperature detectors, separator-measuring instrument, sample resistivity
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| Benefits |
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Total electrical insulation of hydraulic extensions is performed to ensure the control of core parameters, which allows to use both oil and water to generate rock pressure. Not only does it ease the structure and enhance its safety, but it also reduces the level of electromagnetic interference in electrical route while measuring sample conductivity. |
