Journal of Petroleum & Environmental Biotechnology

On the gas-oil relative permeabilities of the southern Algerian shales rock samples

3^rd International Conference and Expo on Oil and Gas

July 13-14, 2017 Berlin, Germany

Rezki Akkal, Mohamed Khodja, Sid Ahemd Hadjsadok and Slimane Azzi

Ecole Nationale Polytechnique, Algeria
Sonatrach, Algeria

Posters & Accepted Abstracts: J Pet Environ Biotechnol

Abstract:

The gas-oil relative permeability behavior of different plugs from the southern Algeria Hassi-Messaoud reservoir has been experimentally studied in order to understand the fundamental processes of two-phase flow taking place within the macrostructure of different rock samples. The experiments have been achieved on the cylindrical Hassi-Messaoud plugs using the unsteady state method to measure the gas-oil relative permeabilities due to its operational simplicity. The impact of factors such as overburden pressure and rock characteristics based on the relative permeabilities curves has been carefully assessed. A great variation in the relative permeability curves trend has been experimentally seen for different rocks extracting from Hassi-Messaoud reservoir. This would be the consequence of the heterogeneous nature of the studied reservoir. This is closely related to either the rock nature or composition. The extracted parameters such as the initial oil in place (IOIP), water saturation and oil and gas relative permeabilities are strongly related to the above-addressed factors. The oil recovery rate at breakthrough is approximately 10-20% of the original oil in place (IOIP); the average is about 15%. The final oil recovery rate, obtained by moving at constant pressure is about 29.4-49% of the original oil in place (IOIP), the average is around 35%. The residual oil saturations (Sor) vary from 44-60% relative to pore volume (Vp); the average is about 53%.

Biography :

Email: rezkidzmin@yahoo.fr