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FLOXLAB
Your supplier of high pressure laboratory instruments

PDP-200 Pulse decay permeameter

ISRM suggested method

Description

The PDP 200 is specifically designed to precisely measure the ultra-low permeability to liquid of very tight rock samples. Permeability measurements are made using the pulse-decay permeability method. This technique reliably delivers permeability measurements for rocks ranging from about 0.01 microdarcy to 0.1 millidarcy.  In essence, the system measures the pressure differential decay across the specimen at specified time intervals. The device comprises a thermostatically-insulated cabinet, two stainless steel reservoirs, a pressure transducer, a high accuracy differential pressure transducer, a number of zero-volume-change valves, one needle valve to initiate the pulse decay and a computer data acquisition station.

Specifications

Permeability range

0.01 microdarcy and 0.1 millidarcy

Maximum confining pressure

70 Mpa (10,000psi)

Maximum pore pressure

20 Mpa (3,000psi)

Specimen diameter

1 inch, 1.5 inches (other upon request)

Specimen length

Twice the diameter

Fluid

Water

Air requirement

100 psi

Power

110-220 VAC , 50/60 Hz

Benefits

No corrections for slippage are required for liquid measurements

High stress liquid permeability measurement are more  representative of reservoir conditions than gas measurements

This technique is particularly suited for low permeability  samples

Compressibility effects are negligible in liquid filled systems and hence work-related temperature variations, as well.

 

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