The PIK-OFP installation is designed to determine filtration, capacitive and electrical core sample properties during single and two-phase stationary and non-stationary filtration at reservoir conditions. The equipment is used to determine oil displacement coefficients by water/gas for evaluating effectiveness of increasing oil recovery physicochemical methods, determining relative phase permeabilities in “liquid-liquid” and “liquid-gas” systems.
• Relative phase permeabilities during joint oil and water filtration in accordance with OST 39-235-89;
• Core sample current saturation
• Electrical resistivity
• Oen porosity coefficient at reservoir conditions
• Oil displacement rate
• Open porosity coefficient depending on changes at reservoir conditions
Hydraulic system
| Crimp pressure, MPa | up to 70 |
| Crimping pressure pump type | manual |
| Pore pressure, MPa | up to 40 |
| Pore pressure pump type | automatic, single plunger |
| Reservoir pumps operating mode | · maintaining constant flow rate
· • maintaining constant pressure |
| Working substance rate, ml / min | 0,001¸50 |
| Pressure maintenance accuracy from VPI, % | 0,5 |
| Flow rate maintenance accuracy, % from the current value | 0,5 |
| Cylinder volume, ml | 200 |
| Working substance | • water with a salinity of – up to 300 g / l • oil |
Temperature maintenance system
| Working temperature range, °C | from +25 to +150 |
| Heated elements | core holder, supply pipes, pump hydraulic parts |
Differential pressure measuring systems
| Upper measurements limit, MPa | 1,6 |
| Measurement accuracy, % | not more than ± 0,075 |
Fluid volume measurement systems
| Type | visual control |
| Meter separator volume, ml | 200 |
| Resolution, ml | 0,1 |
| Fluid-contacting parts material | stainless steel, glass |
| Working pressure
|
atmospheric |
Back pressure regulator
| Pressure, MPa | 40 |
| Control | automatic |
| Fluid-contacting parts material | stainless steel, fluoroplastic, peek |
Electrical resistance measurement module
| Type | Digital resistivity meter |
| Frequency, kHz | 1 |
| Accuracy, % | 0,05 |
| Measurement circuit | 4 electrode |
Core holder
| Core diameter, mm | 30 |
| Maximum column length of core sample, mm | 150 |
| Maximum working crimp pressure, MPa | 70 |
| Maximum working pore pressure, MPa | 40 |
| Maximum working temperature, °С | up to 150 |
| Resistivometric saturation control | 4-electrode circuit |
| Fluid-contacting parts material | stainless steel |
PC-based monitoring and control system
| Control | pumps flow rate, temperature, back pressure regulator |
| Data collection | pressure/differential pressure digital sensors, pumps flow rate, thermocouples, separator meter, sample electrical resistance |