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Р
Р 

G    P  oil   b    , (3.33)
S
P
i k
z( P ) gas  
Р
P  P
where P  i k  i k 1 - average pressure; ( k і) - Tsarevich
2
function, represents the ratio from relative permeability to gas
(F gas) to the relative permeability to oil (F oil)
F
   gas (depending on the relative permeability at the
i k
F oil
table oil saturation).
The values of all parameters included in the formula (3.33)
must substitute the average pressure. The pressure in the formula
(3.32) and (3.33) must be a substitute in MPa.
Dependences reservoir properties of oil and gas from the
saturation pressure are shown in Fig. 3.14.

 gas (P) b P) bP)
1,4
 oil (P)/ S(P) 1,2

250 100 1
z(P) S(P)
200 80

150 60 0,9 z(P)

100 40

50 20 0,8
 oil (P)/  gas (P)

5 10 15 20 P М
Pа
Fig. 3.14 - Dependences of the properties of reservoir oil
and gas from saturation pressure

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