Petroleum & Drilling
Advanced

Reservoir Flow (Darcy Radial)

Steady oil flow rate into a well from radial Darcy flow.

Formula

q=kh(Pe−Pw)141.2 μBln⁡(re/rw)q = \frac{k h (P_e - P_w)}{141.2 \, \mu B \ln(r_e/r_w)}

Variables

qFlow rate (STB/day)
kPermeability (md)
hThickness (ft)
P_eReservoir pressure
P_wWell pressure
\muViscosity
BVolume factor
r_e/r_wRadius ratio

Example

Higher permeability k directly boosts flow rate q

Did You Know?

Permeability is measured in darcies, named after Henry Darcy who studied water flow through Dijon's sand filters.

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