Permeability is measured using a steady-state gas injection technique. The steady state flow method is generally considered the most accurate method for probe permeametry, relying on fewer theoretical assumptions than pulse decay techniques. Permeabilities ranging from 0.1 millidarcies to 5 darcies are measured with the standard 4.0 mm permeability tip. In addition to the fully automatic mode, the measurement control and acquisition software allows user selection of pressure control or flow control based measurements. NER’s Smart-Flow technology allows the system to optimize measurement control parameters during the actual measurement to increase measurement speed and precision.
AutoScan Combined Velocity- Permeability Probe Key Features
- User defined stability criterion for steady state permeability measurements.
- User customizable tip definitions and data acquisition parameters for individual samples and/or rock types.
- Automatic logging of depth, measurement time and measurement history, including complete pressure vs. flow history for each permeability measurement.
- Automatic pressure and flow selection.
- User definable pressure and flow limits.
- Fully combined with
- Range, mD 1-5000
- Flow Controllers, scc/min 0-500
- Pressure Transducers, kPa 0-345