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Table 4.2 – The magnitudes of water viscosity depending on the
temperature

Temperature, Water viscosity, Temperature, Water viscosity,
°С mPa s °С mPa s
0 1.787 50 0.547

5 1.519 60 0.467
10 1.307 70 0.404
20 1.002 80 0.355

30 0.798 90 0.315
40 0.653 100 0.282

4.5 Checking questions

4.5.1 The structure of installation WCPE-1 (ВКТВ-1). How does
the coefficient of permeability of oil- and gas- bearing formations
vary?

4.5.2 For what purpose is the graph of dependence Q = f (ΔР)

built?
4.5.3 Write the equation of linear filtration law (Darcy’s law) and

formulate it. Give identification of all symbols in the equation and

all units of measurement.
4.5.4 Procedure and calculations.
4.5.5 Explain why in practice (under conditions of real

formations) the coefficient of permeability for liquid is less than the
coefficient of permeability for gas?
4.5.6 The structure of the installation IIPC-1M (УДПК-1М).
What is the difference between the installations IIPC-1M (УДПК-1М)

and WCPE-1 (ВКТВ-1)?
4.5.7 What calculations in petroleum engineering is the rock
permeability coefficient used for?

4.5.8 Write the equation for determining the coefficient of
permeability of rock for water. Give identification of all symbols in

the equation and all units of measurement.

4.6 References
/2,3,4,5,6,10,11,12/

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