THE PERMEABILITY OF OIL-BEARING STRATA 



35] 



Figure 1 gives tlie curve recommended by Dolina<*) for determining 

 the permeability of petroleum-bearing Devonian sandstone by the specific 

 resistance. The curve 1 shows the dependence of the coefficient of increase 

 in resistance Q on the coefficient of oil-bearing Kp and water saturation K,^; 

 curve 2 shows the dependence of the residual interstitial water saturation 

 on the permeability. Both curves are drawn from the results of experimental 

 studies on rock samples carried out by MoROZOv. The curve 3 expresses the 



0-98 0-95 0-9 0-8 0-5 



1000 



8 0-1 



8 1-0 



K^, 



Fig. 1. Graphs for determining the permeabihty of the petroleum-bearing Devonian 

 sandstones according to their specific resistance (according to Dolina). 1 — dependence 

 of the coefficient of increase of resistance on the coefficient of water saturation K^^ or the 

 coefficient of petroleum saturation ^p; 2 — the dependence of the coefficient water satu- 

 ration K„^ on the permeability K-, 3 — dependence of the coefficient of increase 

 in resistance Q on the permeability i^pgr- 



