Steady-State Gas Permeameter

The Steady-State Gas Permeameter (CT-GP-SS) determines the gas permeability of plug-sized core samples by steady-state flow at ambient temperature and moderate confining pressure. It covers 0.01 mD to 10 D and belongs to the routine core analysis line, alongside full-diameter and compact steady-state units, combined permeameter-porosimeters and the AP-608 Neo automated system.

How it works

The plug is held under confining pressure and nitrogen is passed through it at a set rate. When flow and differential pressure are steady, permeability is calculated from flow rate, pressure drop and sample dimensions. Confining pressure, gas flow and differential pressure are the controlled variables; gas permeability is the measured result.

Flow pressure is 0 to 100 psi and two flow ranges are fitted, 0 to 50 and 0 to 600 cc/min, so that low and high permeability plugs are read on a suitable scale. Pressure transducer accuracy is 0.1% of full scale and flow accuracy 1% of full scale. The instrument needs a nitrogen supply at 100 psi and 110 to 220 VAC, 50 or 60 Hz. The confining pressure rating and core holder size are project-dependent. Calibrated permeability check plugs are offered for verification.

What is included

• Steady-state gas permeameter with flow measurement on two ranges and pressure transducer
• Core holder size stated in the project datasheet

Specify for your project

• Plug diameter and length
• Confining pressure required
• Expected permeability range within 0.01 mD to 10 D
• Nitrogen supply pressure available at the site
• Supply voltage and frequency
• Whether calibrated check plugs are required

This description defines the product family. Guaranteed performance, included hardware, exclusions, interfaces and acceptance criteria are stated only in the project-specific technical proposal and approved datasheet.

Features

• Permeability Range: 0.01md to 10 darcy
• Flow Pressure: 0 to 100 psi
• Gas flow: 0 - 50, 0 - 600 cc/min
• Temperature: ambient
• Pressure transducer accuracy: 0.1% F.S.
• Flow accuracy: 1 % F.S.
• Nitrogen supply: 100 psi
• Power: 110-220 VAC, 50 or 60 Hz