An analytical model for predicting the productivity of perforated wells

摘要: Abstract In this work, we present an analytical model for the prediction of productivity perforated wells. The basic building block is solution single-phase Darcy flow to a single perforation in semi-infinite porous medium. We have expanded describe well with regularly spaced arrays equidistant perforations along wellbore wall. end result formula skin as function length and radius, shot density, phasing, permeability anisotropy, damage formation damage. Partially wells can be handled help total Jones Watts [Jones, L.G., Watts, J.W., 1971. Estimating Skin Effect Completed Damaged Well. J. Pet. Technol. (February), 249–252.]. results compare fairly previous numerical simulations. readily implemented standard spreadsheet program may used alternative current semi-analytical method Karakas Tariq [Karakas, S.M., Tariq, 1991. Semianalytical Productivity Models Perforated Completions. SPE Prod. Eng. 73–82.]. It shown that does not properly account which overly optimistic productivities, particularly presence