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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. 

Программно-измерительный комплекс для исследования фильтрационно-емкостных и электрических свойств керна «ПИК-ОФП/ЭП»

 

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:

Maximum confining pressure
up to 69 MPa
Maximum pore pressure
up to 40 MPa
Operating environments of hydraulic systems
water with mineralization – to 300  g/l
oil
Material type of the parts in contact with fluids
stainless steel

 

Technical specifications of the pumps:

System of the confining pressure maintenance
single-plunger pump/pneumo-hydraulic amplifier
Regime of rock pressure pump 
steady pressure maintenance
Accuracy of pressure maintenance
0,5% (of the full scale)
Reservoir pumps of liquid supply 
2 pcs (for oil and saline solution)
Type of reservoir pumps Double-plunger 
Operating modes of reservoir-type pumps
- 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%
Consumption 
0,001¸20 ml/min
Cylinder volume
20 ml
Accuracy of pressure maintenance
0,5% (of the full scale)
Accuracy of consumption maintenance 
0,5 % (of the current value)

 

Technical specifications of temperature maintenance system:

Type
Heating cabinet/heat-stable volume + solo heaters
Temperature
to 150°C
Heated elements
core holder, delivery pipes, separating vessels
Basic error of temperature measuring, not over
±1 °С

 

Technical specifications of a differential pressure system:

Sensor 1. Upper range limit of measurement
1,6 MPa
Sensor 2. Upper range limit of measurement
250 kPa
Measurement error, not over
±0,1 %

 

Technical specifications of liquid output volume measuring system:

Volume of a separator gauger
200 ml
Discreteness
0,1 ml
Material type of the parts in contact with fluids Stainless steel

 

Technical specifications of separating vessels :

Type with a dividing piston
Volume
500 ml
Pressure
up to 40 MPa
Temperature
up to 150°C
Material type of the parts in contact with fluids Stainless steel

 

Technical specifications of back pressure regulating valve :

Pressure
40 MPa
Control
Automated, contact with PC
Material type of the parts in contact with fluids
Stainless steel

 

Technical specifications of electrical resistance measuring module :

 

Type
Digital resistivity meter for resistance measurement
Frequency
1 kHz
Error
0,05 %

 

Technical specifications of a core holder for a core with a 30mm diameter:

Core diameter
30 mm (other dimensions upon the request)
Length of a core sample column
up to 150mm (other dimensions upon the request)
Rock pressure
70 MPa
Pore pressure
40 MPa
Temperature
to 150 °С
Resistivity control of saturation 
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
Data acquisition
Digital pressure recorders / differential pressure recorders, pump output, temperature detectors, separator-measuring instrument, sample resistivity 

 

Benefits

 

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.

 

Russian article

 

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