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LABORATORY EXPERIMENT № 4

DETERMINATION OF THE PERMEABILITY COEFFICIENT

OF ROCKS (CORES) FOR LIQUID (WATER) BY MEANS OF
THE APPARATUS (INSTALLATION) WCPE-1 (ВКТВ-1)

4.1 The objective of the experiment is: to determine the
permeability coefficient of rock (core) for liquid (water) by means of
installations WCPE-1 (ВКТВ-1) and IIPC-1M (УДПК-1М) and to
study the structure of installations WCPE-1 (ВКТВ-1) and IIPC-1M

(УДПК-1М).

4.2 Definitions

In the laboratory experiment № 3 and in [2] it was mentioned that
permeability is classified by the type of fluid which flows through the
porous medium as rock permeability for liquid (water, oil, gas

condensate) and rock permeability for gas (natural gas, air).
In practice (under conditions of real formations) the permeability
coefficient determined for liquid is less than the permeability

coefficient determined for gas. Only at high permeability of rocks
their magnitudes are almost equal. Decreasing the permeability of the
same rock for liquid in comparison with the same one for gas happens
because of swelling clay particles and adsorption of liquid on the

walls of pores. On the other side the statement mentioned above can
be explained by the fact that gas is much more movable than liquid
(the phenomenon of gas slippage in the pore medium occurs – that is

Klinkenberg effect).
If the part of pore medium is occupied by one phase it is
obviously that the rock permeability for another phase decreases. The

magnitude of effective permeability is mostly defined by the degree of
saturation of pores with different phases.
Under conditions of real formations different kinds of multiphase

flows take place. These are filtration of oil and water mixture,
filtration of gassed liquid or three-phase flow of oil, water and gas
simultaneously. Each of these flows was researched experimentally.
As a rule the results of the researches are shown in the charts of the

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