The API Subcommittee on Recovery Efficiency presented a statistical study of recovery efficiency in 1967.  From a statistical analysis of data from 312 reservoirs, they developed correlations for water drive recovery from sandstone reservoirs, and for solution gas drive recoveries from sandstone and carbonate reservoirs.

 

Their correlations have been implemented within this utility and an example calculation is shown below :

 

 

References:

Arps., J. J., Brons, F., van Everdingen, A. F., Buchwald, R. W. and Smith, A. E.: "A Statistical Study of Recovery Efficiency" Bulletin 140, API, 1967

 

 

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