A 50-ft core was collected from a newly drilled well. The core
was inspected and was determined that it consisted of 10 layers.
All layers are clean sandstones with uniform properties. One
plug per layer was obtained to for conventional core plug
analysis. The results of experimental measurements are given in
the Project Data Spreadsheet under Core Analysis.
The following steps were taken during the experiments:
The core plugs were weighed as received (War).
The water and oil 6. = 0.85 g/cc) were extracted
from the core plugs and the volume of the water (VW,)
The core plugs were cleaned, dried, and weighed
The length of the core plug was measured (L).
The core plugs were saturated with water and
The saturated core plugs were immersed in the water
and weighed (Wim)
Each saturated core plug was placed in a closed
container whose bottom consists of a porous plate. A
constant air pressure was applied and the air pressure
was gradually increased until the sample weight
reached a minimum. The minimum sample weight
(Wmin) was recorded at the conclusion of each
The core plugs were then dried and were subjected
to permeability measurements with air and the outlet
volume (V2) over 5 minutes was recorded after steady-
state was established.
Air viscosity, u = 0.018 cp
Constant, b = 0.5 atm
Upstream pressure = 2 atm (g)
Outlet pressure =
Water Density, p = 1 g/cc
Rock density*, Ps
= 2.68 g/cc
Measured by crushing the left over pieces.
Determine saturations as received, total porosity, effective
porosity, irreducible water saturation, and permeability for
each core plug.
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