Pressure-Transient Analysis of Perforated Slant and Horizontal Wells

Abstract

This paper was prepared for presentation at the 1999 SPE Annual Technical Conference and Exhibition held in Houston, Texas, 3–6 October 1999.

Inflow Performance Relationship for Perforated Horizontal Wells

“…In a previous study, 32 it was shown that the transients caused by the convergence of streamlines around perforations dies out very fast. Hence, the energy loss caused by convergent flow into perforation tunnels can be represented as an additional stabilized pressure drop beyond very early times.…”

“…[27][28][29][30][31][32][33][34] Landman and Goldthorpe 27 and Marett and Landman 28 presented steady-state models for flow into perforations distributed around a horizontal wellbore. They also proposed the use of variable perforation shot density to obtain a uniform influx along the wellbore.…”

“…Ozkan et al 32 Recently, Goktas and Ertekin 33 developed a numerical simulator for perforated horizontal wells. Their model relies on flexible and locally refined grids to capture the details of the convergent flow around the perforation accurately.…”

“…Most recently, Tang et al 34 extended the perforation pseudoskin model proposed by Ozkan et al 32 and investigated the impact of perforation parameters on horizontal well performance. They observed that the perforation densities higher than 0.5 spf yield a marginal increase in well productivity.…”

Inflow Performance Relationship for Perforated Horizontal Wells

“…[27][28][29][30][31][32][33][34] Landman and Goldthorpe 27 presented a steady state model for flow into perforations distributed around a horizontal wellbore. Their model accounts for wellbore pressure drop but considers an infinitely large reservoir in all directions and treats the neighboring perforations as point sinks.…”