Simulation and Production Optimization on Enhanced Oil Recovery during the Middle and Late Period for SAGD Development in Ultraheavy Oil Reservoirs with Interlayers

Table 3

Comparison of the production characteristics of model A.

Scheme	Time (d)	Cumulative steam injection (10^4 t)	Cumulative oil production (10^4 t)	Cumulative oil to steam ratio (cOSR) (f)	Oil recovery factor (%)	Oil recovery ratio (%)
Conventional SAGD	3241	286291	73420	0.256	67.4	7.59
Infilled horizontal injector	2900	284000	75147	0.265	69	8.68
Infilled horizontal producer	2374	258839	73674	0.285	67.6	10.39