Air Permeameter / Core Porosimeter

127-25

Description

The OFITE Air Permeameter / Core Porosimeter combines the features of the OFITE Core Porosimeter and the OFITE Air Permeameter into one compact, portable unit.

The OFITE Core Porosimeter was designed to rapidly and accurately measure the effective porosity of a core sample. Porosity is defined as the percentage of void within a solid media. Effective porosity is the percentage of void within a solid media in which the pore spaces are interconnected. It is imperative to accurately determine the effective porosity of a petroleum reservoir when estimating the total amount of recoverable hydrocarbons within a producing formation. The Core Porosimeter was designed to precisely measure the effective porosity of a core sample.

The Porosimeter uses Boyle's Law (P₁V₁ = P₂V₂) to measure the porosity of a core sample. It can also be used to measure the grain density of any solid aggregate.

The OFITE Air Permeameter is utilized to measure the permeability of cement core specimens. A core specimen is placed into a core sleeve, which is then inserted into the modified Hassler-style test cell. Nitrogen at a constant flow rate is forced through the core and the differential pressure across the core is measured. The flowrate is measured with calibrated flowmeters. Viscosity is easily determined by the use of nitrogen property tables. These variables are incorporated into Darcy's law to calculate cement sample permeability:

K = [2000 × µ × Q × P × L] / [A × (P_i² - P_o²)]

Where:

• K = Permeability (md)
• P = Mean Flowing Pressure: (P_o + P_i) / 2
• P_o = Outlet Pressure (atm)
• P_i = Inlet Pressure (atm)
• Q = Flowrate (cc / sec)
• μ = Viscosity (cP)
• L = Specimen Length (cm)
• A = Cross Sectional Area (cm²)

For more information about this product or to request a quote, contact us.