Abstract: In order to meet the imperative need of the “Ninth Five-Year Plan” project in Shuanghe oilfield, this paper studies the geometrical scale,plane distribution, petrophysical characteristic of the sedimentary microfacies and their controls on the distribution of remaining oil. There are mainly distributary channel, river mouth bar, front sheet sand, gravity flow sand and overbank sand in the fan delta front of Shuanghe oilfield. Each of them holds its own features of geometrical scale, plane distribution and petrophysics. These features control injection and liquid producing capacities of the pay zones, plane oil-water movement and well-pattern controlled degree; furthermore, they also control the remaining oil distribution. The remaining oil divided into the lace-like and the lens-like occurs richly in the microfacies sand bodies with poor petrophysical property and small scales during the late period of development.

Key words: sedimentary microfacies, remaining oil, heterogeneity, late period of development, Shuanghe oilfield