ratio of liquid and gaseous HC
        								          
        				
												  
    
    
  
    
        
  
  
      
        
    
        
    
  
    
    
          Statistical analysis of the data shows a significant correlation between the magnitude of the curves (GF) and the density (ρ) of hydrocarbon mixtures in Orenburg, Saratov and parts of the Buzulukskoj basin. Gas distribution in nature and depth of the medium verhnedevonskogo by three zones with substantially different phase features (values of the curves) and formation of hydrocarbon systems: I – South (the predominance of gas-condensate deposits); II – Central (oil and gas, and gazoneftânye deposits); III – North (the predominance of oil deposits).