关键词: 稠油, 相对渗透率, 误差, 死体积, 校正

Abstract:

The heavy oil relative permeability curve is an important parameter in heavy oil reservoir performance prediction.
The error in the relative permeability test caused by experimental factors will result in wrong information for reservoir development
analysis. Due to the long exit end pipeline and more dead volume in the high temperature relative permeability test，the
oil-water phases flowing law in the exit end pipeline of core holder and method of dead volume calibration will have important
effect on relative permeability experimental results. The phenomenon of non-piston like displacement and pressure hysteresis
effect have been discovered based on the water flooding experiment of heavy oil in the exit end pipeline. The breakthrough
recovery and ultimate recovery factor decrease with increasing oil viscosity and water drive velocity，and the metering oil volume
is behind the data corresponding to the pressure. The conventional data correction by oil volume deducting space volume
of pipeline may lead to the deviation of experimental results from the actual flow behavior，so a new method of data calibration
is proposed.

Key words: heavy oil, relative permeability, error, dead volume, correction