Abstract: On the basis of applied mathematics. logistic cyclic model “as introduced into steamdrive performance analysis using practical data of vIscous oil reservoir steamdrive. The model for per formance analysis. coincident with viscous oil steamdrive characteristics. is developed by means of m2 thematical statistic analysis. which can be used represent relationshjp between oil production rate and steam ingection rate. and deter mine steam inection rate. oil production rate. and OSR on a optimal basis. in a viscous oil teservoir.

Key words: Viscous oil reservoir, Logistic model, Steamdrive, OSR, Stcam inyection rate, Oil production rate