Qing-Hui Zhao

Experimental Study on Improving SAGD Performance in Ultra-Heavy Oil Reservoirs by Flue Gas Assistance

Steam assisted gravity drainage (SAGD) is an advanced technique for ultra-heavy oil recovery that generally yields high oil recovery factors. However, in the mid-to-late stages of SAGD operation, several issues emerge, including severe steam override toward the upper oil layer, a low oil-to-steam ratio, and substantial...