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CO₂ Injection Well Sizing

CCUS · Storage · BHP · Fracture margin · Injectivity

CO₂ Injection Well Sizing
Bottomhole pressure required for injection, margin to fracture, and injectivity for a CO₂ storage well in saline aquifer or depleted reservoir. Radial Darcy flow + Hubbert-Willis fracture criterion. Per ISO 27914 / DOE NETL Best Practices.
⚠ Preliminary screening only. Radial Darcy + Hubbert-Willis fracture is an analytical bound; real injection performance depends on reservoir heterogeneity, multiphase relative permeability, geomechanics, and CO₂-brine-rock chemistry. Final injection-well design requires site-specific reservoir simulation (e.g., CMG-GEM, ECLIPSE-CO₂STORE), step-rate injection testing, and Class VI permit evaluation per 40 CFR 146 Subpart H. Verify all results with a licensed reservoir engineer / geomechanics specialist before any field implementation.

Injection Stream

kg/s
mm

Reservoir

m
MPa
°C
MPa/m
mD
m

Well Geometry

m
m
%

Engineering Basis

  • Radial Darcy: Q = 2π·k·h·ΔP / (μ·(ln(re/rw) + S))
  • P_frac = depth × frac_gradient (Hubbert-Willis 1957).
  • CO₂ density & viscosity at reservoir T,P from PR-Peneloux + FVW.
  • Frac margin target 10-20% per ISO 27914 / EPA UIC Class VI.
  • Standards: ISO 27914:2017, DOE NETL Best Practices, API Std 5CT.
  • Screening only — final design with reservoir simulator (ECLIPSE / CMG / TOUGH2-CO2).