EVALUATION OF PRODUCTION THROUGH HIGH-RATE GRAVEL PACKED OIL WELL

ABSTRACT

This paper presents solutions and analysis of mathematical model of skins due to completions in gravel packed oil wells. The models is centered on a Cased-hole perforated gravel packed well. The skins due to completion include damaged skin, restricted entry skin, liner skin, gravel packed sand skin, slanted well skin, perforation geometry skin, crushed zone skin, non-darcy skin and the skin in the perforation tunnel. The resu1ts obtained from the ca1cu1ation shows that increasing the perforation radius, perforation length and crushed zone permeability results in the decrease of crushed zone skin for both darcy and non-darcy flow, the perforation geometry skin and skin in the perforation tunnel for both darcy, and non-darcy flow for a given shot density. The solutions obtained from each gravel packed skin model is then used to analyze field and experimental data in order to estimate the skins and the decrease or increase in productivity ratio due to completions in gravel packed well.