// multi-utility computation suite · offline · instant · precise
┌──────────────────────────┐
│ [c] calcalyst_ │
│ computation suite │
└──────────────────────────┘
// select a module to initialize
/ search↵ open firstesc close
// adsenseEMPTY_LEADER_SLOT728×90
// adsenseMOBILE_ANCHOR_SLOT320×50
// keyboard_shortcuts
/focus search
↑↓navigate module list
Enter
open first result from search
open highlighted
compute when module is open
compute when focused in a field
Escclose module · clear selection
⌫
eng.gas-well-back-pressure Calculator
Calculates gas well back pressure curve from stabilised flow test data using the empirical deliverability equation. The back pressure equation (Q = C(P²r − P²wf)^n) characterises well deliverability — n=0.5 is turbulent flow, n=1.0 is Darcy flow.
Inputs
P Res Psia
Force per unit area (Pa). Atmospheric pressure at sea level: 101,325 Pa. Check whether gauge or absolute pressure is required.
P Wf Psia
Reference formula or conversion factor shown for context.
C Deliverability
Reference formula or conversion factor shown for context.
N Exponent
Reference formula or conversion factor shown for context.
Results
gas flow rate q (Mscf/day)
Flow rate Q — the volume of fluid passing a point per unit time.
AOF at Pwf=0 (Mscf/day)
The value at the specified point or condition.
P_r²-P_wf² (psia²)
Reference formula or conversion factor shown for context.
q = C(Pr²-Pwf²)ⁿ
Reference formula or conversion factor shown for context.
n interpretation
Qualitative summary of what the computed numbers mean in practical terms.