Chapter 15 



DETERMINING THE PERMEABILITY OF OIL-BEARING 

 STRATA FROM THE SPECIFIC RESISTANCE 



S. G . KOMAROV AND Z. I. KeIVSAR 



The method for determining the permeabiHty of oil-bearing strata from the 

 specific resistance was proposed in 1947 by G. S. Morozov. On the basis 

 of experimental studies at the Research Institute for Geophysical Survey 

 Methods, he established a relationship between the coefficient of increase 

 in resistance and the permeability. This relationship was recommended for 

 the determination of permeability. 



A number of papers and in particular those of Dolina^^'^) have been 

 devoted to the determination of permeability of oil-bearing rocks from the 

 specific resistance. As a result of this work, Dolina developed a procedure 

 for determining from their specific resistance (^), the permeability of the oil- 

 bearing Devonian sandstones. 



We give here an account of the method for determining the permeability 

 of the Devonian petroleum-bearing sandstones from their specific resistance. 



THE METHOD FOR DETERMINING THE PERMEABILITY OF THE PETROLEUM - 

 BEARING DEVONL\N SANDSTONES FROM THEIR SPECIFIC RESISTANCE 



To determine the permeability of the stratum, at first a determination is 

 made of the coefficient of water saturation of the petroleum and gas-bear- 

 ing stratum. 



The coefficient of water saturation refers to the ratio K^^ of a part of the 

 volume of the pores, filled with water, to the total volume of the pores. 

 Let us note that with the coefficient of petroleum and gas saturation (or, 

 having in mind only the petroleum-saturated strata, the coefficient of petro- 

 leum saturation) K refers to the ratio of the volume of pores filled with 

 petroleum to the total volume of pores. Obviously, 



The coefficient of water saturation is determined by the coefficient of in- 

 "Crease in resistance 



'? = -^. (1) 



349 



