Permeability and Porosity

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Weatherford Laboratories measures porosity, grain density, horizontal permeability, vertical permeability, and Klinkenberg permeability at ambient and net confining stress up to 10,000 psi on core plugs, rotary sidewall cores, and full-diameter core samples. Directional permeability on oriented core can also be measured under ambient and net confining stress (NCS) conditions.

Weatherford Laboratories provides ambient and NCS data which has been extensively compared to standards and various types of QA/QC. Our services play a pivotal role in reservoir completion strategies. With production success increasingly dependent upon what is known about a reservoir, laboratory analyses help quantify the unknown and reduce risk. The result is better wells, better recovery, and better overall economics.


Porosity and permeability data is used to:

  • Assist in the characterization of rock quality within the reservoir

  • Characterize fracture permeability

  • Identify zones for completion

  • Identify residual oil zones (ROZ)

  • Identify oil-water contacts

  • Correlate logs

Full-diameter (FD) porosity and permeability measurements

FD utilizes samples that are the diameter of the retrieved core interval and sample lengths up to 12 inches. The samples are large enough to characterize porosity and permeability on heterogeneous rock types.The data (porosity, grain density, permeability, and fluid saturations) provided by FD analysis are presented in a format that can be correlated with downhole logs and used to calibrate the E-Logs to the physical measurements made on the FD samples. Porosity and permeability relationships can be used to develop a correlation for use in non-cored wells, which in turn, can aid in future completions.


Grain density, porosity, and steady-state permeability all aid in correlating logs with measurements from the actual rock, calculating reserves, and determining optimal completion decisions.