Standard Single Well Decline Types

PetroVR offers a selection of exponential, hyperbolic and harmonic decline curves. The declines are defined by:

Standard Single Well Decline Types (1)
  • Exponential: n = 0
  • Hyperbolic: 0 < nusing < 1
  • Harmonic: n = 1

Exponential Rate-Time relationship:

Standard Single Well Decline Types (2)Standard Single Well Decline Types (3)Standard Single Well Decline Types (4)
  • t = Time (years)
  • q = Rate (bpd)
  • qi = Initial Rate (bpd)
  • N = Cumulative Production (bbl)
  • %AI = Annual Decline Rate in percent
  • D = 1/C = Nominal Decline Rate (years)

Hyperbolic Rate-Time relationship:

Standard Single Well Decline Types (5)Standard Single Well Decline Types (6)
  • n = Hyperbolic Exponent

Harmonic Rate-Time relationship:

Standard Single Well Decline Types (7)Standard Single Well Decline Types (8)