Computation of the pseudoskin factor for a restricted-entry well

Journal Article · Tue Mar 01 04:00:00 EST 1994 · SPE Formation Evaluation (Society of Petroleum Engineers); (United States)

DOI:https://doi.org/10.2118/21705-PA· OSTI ID:7115855

Ding, W ^[1]; Reynolds, Jr, A C ^[2]

---

1. Joshi Technologies International Inc., Tulsa, OK (United States)
2. Univ. of Tulsa, OK (United States)

Wells frequently are completed over a fraction of the oil zone to delay water and gas coning. This type of completion is called a restricted-entry or partially penetrating well. When analyzing well-test data from a restricted-entry well, semilog analysis of pseudoradial flow data yields an estimate of the total skin factor, which is a linear combination of the mechanical skin factor and the pseudoskin factor caused by restricted entry. This work presented two new equations for computing the pseudoskin factor from a restricted-entry well completed in a multilayer reservoir. These equations represent generalization of formulas presented by Papatzacos and Vrbik for single-layer homogeneous reservoirs. For ranges of reservoir and well parameters ordinarily encountered, the new equations provide results approximately equal to those obtained from the Yeh-Reynolds calculation procedure, but are easier to use than this equation.

• OSTI ID: 7115855
• Journal Information: SPE Formation Evaluation (Society of Petroleum Engineers); (United States), Journal Name: SPE Formation Evaluation (Society of Petroleum Engineers); (United States) Vol. 9:1; ISSN 0885-923X; ISSN SFEVEG
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
023000 -- Petroleum-- Properties & Composition
ENERGY SOURCES
FLOW MODELS
FLUID FLOW
FLUID MECHANICS
FORMATION DAMAGE
FOSSIL FUELS
FRICTION FACTOR
FUELS
MATHEMATICAL MODELS
MECHANICS
OIL WELLS
PERMEABILITY
PETROLEUM
RESERVOIR ROCK
REYNOLDS NUMBER
WELLS