User Options: Product Specific

Value Navigator calculates an exponential, harmonic, and hyperbolic decline for oil, 1+WOR (inverse of oil cut), condensate, and gas. It then determines the average on-time, the maximum producing rates, and estimates the reserves associated with each of the possible decline types. A best fit is then produced.

Exponential, Hyperbolic, or Harmonic declines can be enabled or disabled with the check boxes. Enabling these decline types under PDP (Proved Developed Producing) or PPDP (Proved + Probable Developed Producing) generates a decline in those reserve categories.

Declines are not calculated if the Exponential, Hyperbolic, and Harmonic boxes are all deselected.

The Min. and Max. Exponents specify the Ni range allowable for the hyperbolic decline. Specifying a maximum Ni of less than 1.0 prevents harmonic declines (Ni=1).

The Default parameters are used when inclining or shallow decline best fit slopes are created.

The Use exponential transition setting controls when hyperbolic or harmonic declines transition to an exponential decline.