A rigorous formation damage skin factor and reservoir inflow model for a horizontal well

Kenji Furui, D. Zhu, A. D. Hill

Research output: Contribution to journalArticle

88 Citations (Scopus)


In this paper, we present a new analytical model for formation damage skin factor and the resulting reservoir inflow, including the effect of reservoir anisotropy and damage heterogeneity. The shape of the damaged region perpendicular to the well is based on the pressure equation for an anisotropic medium and, thus, is circular near the well and elliptical far from the well. The new model can be used for various distributions of damage along the well, depending on the time of exposure during drilling and completion. The inflow equation for a damaged, parallel-piped-shape reservoir illustrates the importance of the ratio of the reservoir thickness to the drainage length perpendicular to the well on the influence of formation damage for horizontal well productivity. Our model gives a simple, analytical expression for determining this effect.

Original languageEnglish
Pages (from-to)151-157
Number of pages7
JournalSPE Production and Facilities
Issue number3
Publication statusPublished - 2003 Aug
Externally publishedYes


ASJC Scopus subject areas

  • Fuel Technology

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