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Choose a Product: Oil / Gas

Default Units: bbls for oil / mmcf for gas

Choose a Decline Method: exponential / hyperbolic / harmonic

Enter Decline %: Usually a number between 0 and 100; A negative number represents an increase rather than a decline

Enter N for hyperbolic decline only: Usually between 0 and .7; Controls the shape of the curve

Enter an Initial Rate: ( in default units)

Choose the time unit for the initial rate: months / years

Choose an Ending Condition: time / ending rate / reserves

Choose an Ending Unit:
Time (months / years)
Ending Rate ( /day, /month / year)
Reserves ( default units)

Enter a value for the Ending Condition chosen:

Click Calculate:
The initial calculation may take a minute while the application loads.