The effect of flow from perforations on two-phase flow: implications for production logging Academic Article uri icon


  • The phenomenon of a dense phase (water) entering through perforations into a stream of a less dense phase (gas or oil) has been examined in a model wellbore. When water entered a gas stream, some of the water fell through the gas stream to occupy a portion of the wellbore below the perforations for all conditions tested and anomalous pressure behaviour was observed in the region of the perforations. In the oil water tests, all of the water was swept upwards by the oil only at the highest oil flow rate (5 000 b/d) and lowest water flow rate (50 b/d) with the pipe vertical. The deleterious effect of dense phase fallback on production log interpretation is demonstrated. (A)

author list (cited authors)

  • Zhu, D., & Hill, A. D.

complete list of authors

  • Zhu, D||Hill, AD

publication date

  • January 1988