Impacts of pore size distribution on gas injection in intraformational water zones in oil sands reservoirs
College of Petroleum Engineering, Xi'an Shiyou University, Xi'an, 710065 Shaanxi, China
2 Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs, Xi'an, 710065 Shaanxi, China
3 Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, T2N 1N4 Alberta, Canada
* Corresponding author: email@example.com
Accepted: 8 June 2020
Intraformational water zones are widely reported in Canadian oil sands fields. In order to pressurize a thief zone, one of the initiatives is to 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 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.
© J. Xu et al., published by IFP Energies nouvelles, 2020
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