Page 336 - Principles of Applied Reservoir Simulation 2E

Part V: Technical Supplements 321

The subscript k in Eq. (31.3) denotes the &* connection. The remaining
parameters are defined as follows:
K = horizontal permeability of connection k (md)
h = thickness of connection & (ft)
L = horizontal well length (ft)
= wellbore radius (ft)
r w
r eh = drainage radius of horizontal well (ft)
S = dimensionless skin factor
The drainage radius r eh of the horizontal well needs to account for elliptical flow
into the wellbore. Babu and Odeh [ 1989] present a procedure for estimating r eh.