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Routine Rock Properties

CMS™-300 Automated Permeameter


CMS™-300 Core Measurement System, Model 300 Stage4.00, integrated, automated computer-directed, unsteady state pressure decay Permeameter and Porosimeter. Determines Sample Length, Sample Diameter, Porosity (0.01 to 40 percent), Pore Volume, equivalent air permeability at a specified mean pressure, Klinkenberg Permeability (equivalent liquid permeability) Forchheimer Inertial Factor (Beta & Alpha), and Klinkenberg measured slippage correction factor at programmable, net sequential overburden pressures from 250 to 9,800 psig on 1" and ½" diameter cylindrical plugs ¾" to 31/8" in length. (Custom Sizes including 30mm sample diameter).

Version 4.50 is available as an upgrade to existing systems and provides the following improvements in performance:

CMS-300 Automated Permeameter
  • Improves Low Permeability Performance by allowing use of Nitrogen for Low Permeability Samples. Choice of flowing gas automatically determined by version 4.50 operating software.
  • Replacement of STD Bus allows all operations to be conducted onboard the PC with communication to the CMS™-300 via a high speed USB connection.
  • Improved graphical interface featuring on line help and operating procedures.
  • Compatibility with the latest Windows operating system.
  • Improved online troubleshooting and maintenance procedures reduce downtime and improve sample throughput.
  • Incorporates fully all performance increases added under Stage One Version 3.88 Upgrade
  • Dual-Gas Mode incorporated for permeability measurements of samples with permeability less than 0.01md. Pre-screening allows automatic switching of measurement gas.

The instrument uses an integrated form of the combined Darcy, Klinkenberg and Forchheimer equations to accurately determine permeability from >15 Darcies to <0.05 microdarcies (0.00005mD). Data collected during this measurement is used to determine non-reactive liquid permeability (Klinkenberg), calculate an equivalent air permeability at a specified mean pressure, Klinkenberg slip factor, Forchheimer inertial (formally turbulence) factor (Beta) and Jones pore system Reynold’s number (alpha).

Pore Volume measurements are made using an advanced Boyle’s Law method combined with advanced calibration technique for improved accuracy.

An advanced algorithm allows actual confining pressure to be matched with requested confining pressure resulting in improved accuracy of measurements. An integrated digital caliper workstation allows for the automatic input of sample dimensions and allows the operator to automatically make corrections for irregular shaped samples. The patented loading system allows unattended operation, the operator not being required to remove analyzed samples from the system.

The CMS™-300 uses helium as its measurement fluid under normal operating conditions with automatic switching to nitrogen for low permeability determinations. The permeability only options allow for the rapid screening of samples for permeability and Forchheimer factor without requirement to perform lengthy pore volume determinations. Data is both printed and stored on hard disk along with Quality Control data allowing improved evaluation of data.