How does helium porosimeter work?
By Daniel Avila
How does helium porosimeter work?
When running a test, the helium gas is filled with the reference volume at a constant pressure and then expands into the sample cell. The initial and finial stabilized pressure are recorded and used for the determination of the sample pore volume, then the porosity could be obtained.
What is helium porosimeter?
The Helium gas expansion porosimeter enables the determination of a sample’s (1” or 1.5” diameter) grain and pore volume via an isothermal helium expansion and the application of Boyle’s law and Charles’ law. Subsequently, porosity and grain density can be calculated.
Why helium is used in helium porosimeter?
The reason why in most of the papers Helium is used rather than using Nitrogen is because of its small size. It offers easy penetration through small pores and yields better result. This is also the case with Mercury Porosimetry, Helium is used over Mercury as well.
Why we use helium gas for porosity determination?
Helium gas is used to measure the “true density” and “true porosity” with the assumption that helium being the smallest atom should be able to penetrate the smallest of pores whereas other fluids may not.
What is gas Porosimeter?
The BLP 530 Gas Porosimeter was designed to rapidly and accurately measure the effective porosity of a core sample. Porosity is defined as the percentage of void space within a solid media. The BLP 530 Gas Porosimeter was designed to precisely measure the effective porosity of a core sample.
What is liquid saturation method?
A technique for measuring the pore volume of a core sample from the difference in its weight when dry and when saturated with a liquid. The saturated sample is then weighed again. The difference in weight divided by the density of the liquid is the connected, or effective, pore volume.
How is capillary flow measured?
Capillary flow porometry, also known as porometry, is a characterization technique based on the displacement of a wetting liquid from the sample pores by applying a gas at increasing pressure.
How does a gas pycnometer work?
A gas pycnometer operates by detecting the pressure change resulting from displacement of gas by a solid object. Expanding a quantity of gas at known pressure into an empty chamber and measuring the pressure establishes a baseline. Then a sample is placed in the chamber and the chamber is resealed.
What is a good porosity percentage?
For most rocks, porosity varies from less than 1% to 40%.
What is a helium porosimeter used for?
A helium porosimeter was utilized to equilibrate and quantify the total or helium porosity of two core samples. The calibration of the helium porosimeter was already performed. The addition of a core sample to the matrix cup was sealed off by discs which prevented any unwanted volume to be measured by the helium atoms.
What is the helium porosity of the helium formation?
The helium porosity of two core samples were found to be 24.39% and 39.40%. Porosity, density, and permeability are all important parameters and properties to consider with regards to oil and gas industry. At deep depths, porosity of geological formations can be evaluated based on well logged data.
What is helium gas used to measure?
Helium gas is used to measure the “true density” and “true porosity” with the assumption that helium being the smallest atom should be able to penetrate the smallest of pores whereas other fluids may not.1 A helium porosimeter was utilized to calculate and evaluate the density and helium porosity of two core samples.
What is the effective porosity of a solid?
The effective porosity was measured to be 56.2% which corresponded with expectations. The porosity of four core samples of different composition was found to range from 0.61-38.01%. Sample 1 contained the highest density at 2.78 g/cm3 and lowest porosity at 0.61%.
