The “PIK-/OFP-K-320” equipment complex for high-temperature research in acid-resistant performance

The PIK-OFP-K-320 complex is designed to study filtration, capacitive, elastic and electrical bulk model properties at reservoir conditions under stationary and non-stationary two-phase filtration when studying high-viscosity oils displacement processes by hot water, steam and chemically aggressive environments. The complex is equipped with high-temperature unit, including steam generator-superheater, heat-insulating box and temperature control system. Pore fluids (oil, water) filtration can be performed in forward and reverse directions.

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Benefits/Capabilities:

Uniform temperature maintaining for entire bulk reservoir model (up to 320 ºС)
Sequential injection of oil, cold water, hot water and steam in isothermal mode
Determination of the initial and residual water saturation after oil displacement by cold water, hot water or steam
Temperature control over the entire bulk reservoir model
Research using acidic (HCL, HF, acetic acid) and alkaline composition

Measured parameters

Relative phase permeability for “liquid-liquid”, “liquid-gas”, “liquid-liquid-gas” systems in accordance with OST 39-235-89
Absolute effective liquid permeability
Oil displacement coefficient by water/steam
Propagation time of longitudinal and transverse ultrasonic waves
Open porosity coefficient at reservoir conditions
Acid and alkaline compositions impact effectiveness on reservoir
Open porosity coefficient depending on changes at reservoir conditions
Electrical resistivity

Technical specifications

Hydraulic system

Maximum crimp pressure, MPa	up to 70
Maximum pore pressure, MPa	up to 40
Hydraulic working substance	• water with salinity up to 300 g / l • oil • acids solutions, HCL-14%, HF-5%, acetic acid – 0.2%
Fluid-contact parts material	stainless steel, acid resistant alloy (Hastelloy C-276 or equivalent)

Pump groups

Crimp pressure maintenance system	single plunger pump / pneumatic hydraulic amplifier
Mountain pump operating mode	constant pressure maintaining
Pressure maintenance accuracy, % (from full scale)	0,5
Fluids flow reservoir pumps	2 pcs. (for oil and saline)
Reservoir pumps type	double plunger
Reservoir pumps operation mode	• maintaining constant flow rate • maintaining constant pressure • maintaining set proportion when filtering two fluids phases through a core sample from 0 to 100%.
Flow rate, ml / min	0,001-50
Cylinder volume, ml	200
Maintaining pressure accuracy, % (from full scale)	0,5
Maintaining flow rate accuracy, % (of the current value)	0,5

Temperature maintenance system 1

Type	heating chamber
Maximum temperature, °C	+150
Heated elements	core holder, supply tubes, separation tanks, separator

Temperature maintenance system 2

Type	clamp heater
Maximum temperature, °C	320
Heated elements	bulk reservoir model

Outgoing fluid volume measurement system

Type	visual
Meter separator volume, ml	200
Working pressure, MPa	up to 70
Resolution, ml	0,1
Fluid-contact parts material	stainless steel, sapphire

Pore fluids separating tanks

Type	with dividing piston
Volume, ml	500/1000
Pressure, MPa	40
Maximum temperature, °C	150
Fluid-contact parts material	stainless steel

Acid solutions separation tanks

Type	with dividing piston
Volume, ml	250 ml
Pressure, MPa	up to 40
Maximum temperature, °C	150
Fluid-contact parts material	acid resistant alloy (Hastelloy C-276 or equivalent)

Ultrasonic wave velocity measurement system

Working frequency, MHz	1
Ultrasonic waves speed measurement range, m / s	from 500 to 9000
Ultrasonic vibrations source	• longitudinal and transverse waves independent excitation • signal power smooth adjustment• computer and optionally manual control
Measurement results storage and processing	• marker determination of the first wave entry time • digital storage of received signals • sample elastic constants automatic calculation

Steam generator – superheater

Type	flow
Pressure, MPa	40
Maximum temperature, °C	320
Steam supply	dry, saturated

Bulk isothermal reservoir model

Diameter, mm	from 30 to 110
Bulk model length, mm	up to 1000
Pore pressure, MPa	40
Maximum temperature, °С	320

Core holder

Core diameter, mm	30
Maximum column length of core samples, mm	300
Maximum working crimp pressure, MPa	70
Maximum working pore pressure, MPa	40
Maximum working temperature, °С	+150
Resistivometric saturation control	4 electrode circuit
Fluid-contact parts material	stainless steel / acid resistant alloy

Electrical resistance measurement module

Type	digital resistivity meter
Frequency, kHz	1
Accuracy, %	0,05

PC-based monitoring and control system

Control	pump flow / pressure, temperature, back pressure regulator, automatic valves
Data collection	pressure / differential pressure digital sensors, pumps flow rate, thermocouples, sample electrical resistance