Probe permeameter Routine core analysis Instruments

The purpose of the instrument is to perform rapid, non-destructive, localized permeability measurements on rock samples using the steady state method. The main components are pressure, flow, core frame, and injection probe modules. A measurement is taken by positioning the probe tip at a desired location on the sample and then pressing against its surface. Hereafter, nitrogen gas is forced to flow at constant pressure through the injection tip and into the permeable sample. A mass flow controller determines the flow rate while the pore pressure is deduced from a highly accurate electronic pressure transducer. The instrument is provided with a data acquisition and calculation computer station. Permeability values are derived from the modified Darcy’s law which includes a geometric factor that takes into account flow complexities around the tip seal.

Permeability Range :

• 0.01 mD to 10 darcies

Pore Pressure :

• 100 psi

Probe actuator Pressure :

• 100 psi

Pressure transducer accuracy :

• 0.15% F.S.

Temperature :

• ambient

N2 :

• 250 psi

Air :

• 100 psi (dry)

Power :

• 110-220 VAC, 50 or 60 Hz

• The method is non destructive in the sense that there is no need to cut core plugs. It is rapid and low cost.
• The probe investigates only a small volume of rock. The measurement is well suited for investigation of spatial permeability variation in cores containing thin laminations and small scale heterogeneity.