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PIK-API RP 61 Proppant Pack Conductivity Measurement System
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The system is intended for studying proppant pack conductivity under conditions close to reservoir ones. The system can determine long-term conductivity of proppant placed between plates of a standard laboratory core (Ohio & Berea) or core taken from reservoir.
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The following parameters can be tested:
- Short-term conductivity according to API RP 61;
- Long-term conductivity between core plates;
- Turbulence factors of gas flow;
- Multi-phase flow parameters;
- Proppant flowback parameters.
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A cell modeling a fracture is placed in a hydraulic press. Fluids pre-heated to reservoir temperature are pumped through the proppant pack. At a fixed compression of the pack, the following parameters are measured: pressure difference, flow rate and fracture width. Conductivity of the pack is determined according to Darcy law.
When proppant has been filled in the cell and tanks filled with fluids, all processes are controlled by computer. The system is simple in operation and very reliable.
| Pump to run liquid through fracture model |
| Pressure | 0-10 MPa |
| Pressure maintenance | 0.5 % |
| Flow rate | 0.001-100 ml/min |
| Flow rate maintenance | ±0.25 % |
| Differential pressure gauge |
| Measurement range | 0 kPa - 0.75 kPa ±0.045 % |
| Backpressure regulators |
| Regulation range | 0 - 7 MPa. ±0.1 % |
| Pack thickness measuring devices |
| Measurement accuracy | 0.025 mm |
| Rock pressure system |
| Axial compression | 100 tons |
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