NANOHYDROMECHANICS - Foundations of Nanotechnology: Pore Size in Carbon-Based Nano-Adsorbents - page 231

depending on the conditions of oil, since the magnitude of the volume ratio is de-
pendent on the parameters of technology of oil preparation (the number of stages
of oil separation and the temperature and pressure conditions).
The density is determined for each formation zone in the case of inhomogene-
ity of the properties of reservoir oil in the layer. In this case, during the separa-
tion of the extracted products on the commodity oil and associated gas only their
masses will be dependent on the properties of reservoir oil and the parameters of
ground preparation.

5.3 NANOBUBBLES OF GAS, OIL IN THE PORECHANNELS AND
WATER
The average diameter of the channels of the porous medium d is easy to estimate
using the well known relationship.

4 m

d =

(5.9)

S

where, m - Porosity ofthe medium,fraction of a unit; S - Specific surface (surface
per a volume)
Clay Oil Gas Motherboard Thicknesses (OGMT) usually characterized by a
porosity of 10-20%, and their specific surface of not less than 10 8 m -1 . Conse-
quently, the diameters of the pore channels of clay OGMT not exceed an average
of 3 nm.
The minimum diameter of a gas bubble in a water medium can be calculated
from the following assumptions:
The gas pressure p g in a bubble caused by the action of two components: of the
deposit pressure

and the pressure of surface tension p .

pp p
π

=+

(5.10)

g n s

orinaccordance with the lawof Laplace

s
=+

2

pp

(5.11)

g n π

R

where, s - Coefficient of the surface tension of the liquid, in which formed a gas
bubble; R - the bubble radius [50, 57].
Gas bubbles can be considered an ensemble of hydrocarbon molecules with a
mass equal to or less than the buoyant force acting on it in the liquid, which gives
a formal record

NM =r W

(5.12)

g g

where, N - Number of moleculesin the ensemble; M - Massof each molecule;
g - Acceleration of free fall; r -Density of the liquid; W - Volumeof the bubble.