Example of calculating the permeability of energy storage field

What is reservoir permeability classification?

Table 3.1 Reservoir permeability classification. Permeability is measured on cores in the laboratory by flowing a fluid of known viscosity through a core sample of known dimensions at a set rate, and measuring the pressure drop across the core, or by setting the fluid to flow at a set pressure difference, and measuring the flow rate produced.

How is permeability measured?

This is done through effective and relative permeability data. Effective Permeability: Effective permeability of rock to a fluid phase (oil, gas, or water) in porous medium is a measure of the ability of that phase to flow in the presence of other fluid phases. It is permeability to a particular fluid when it is saturated of less than 100%.

What are the units of permeability?

The units of permeability are the darcy, D, and m2, where 1 D = 0.9869 ́10-12 m2. One darcy is the permeability of a sample 1 cm long with a cross-sectional area of 1 cm2, when a pressure difference of 1 dyne/cm2 between the ends of the sample causes a fluid with a dynamic viscosity of 1 poise to flow at a rate of 1 cm3/s (Fig. 3.2).

How do you calculate effective permeability?

The effective permeability can then be calculated by setting the average perturbation to be zero (Kirkpatrick, 1973) (6) ∫ k − k eff k + (z 2 − 1) k eff f (k) d k = 0 where f (k) is the probability density function of permeability, and z is the coordination number equal to 4 and 6 respectively in two and three dimensions. We should note that Eq.

How do you calculate permeability of a gas?

If the input gas pressure is Pi and the output pressure is Po, then the permeability is plotted as a function of 1/Pav = 2/(Pi + Po), as in Fig. 3.3. The points should now lie on a straight line, which intersects the y-axis at 1/Pav = 0.

Can permeability be measured using Core Data?

Permeability and scale of measurement The estimation of permeability can use core data alone in cases where core plugs have been cut at a regular (six-inch) spacing across the tested interval. Otherwise, recourse has to be made to core-calibrated well-logs. In the former case, measurements of permeability at the core scale can be used directly.