Intraformational water zones are widely reported in Canadian oil sands fields.In order to pressurize a thief zone, one of the initiatives is to Dining Room Package inject gas.However, the evaluation of gas injectivity based on a pore size distribution is still a big challenge.This study provides a multi-scale approach to study the effect of a pore size distribution on gas injectivity in intraformational water zones.
The results indicate the gas effective permeability increases in a less complex and more Western Tack Sets discrete pore network.The enhancement of gas effective permeability with increased gas saturation weakens with higher complexity and lower discreteness of a pore network.A less complex and more discrete pore network better benefits the gas injectivity index.