Abstract: The geometrical scale and distribution of a reservoir's microfacies sand body are the bases to analyze the regulation of in-situoil and water flow and adjustment for proper well patterns. This paper proposes a method to build the detailed framework model for fan-delta front reservoir based on the geological features of Shuanghe oil field, in order to meet the requirements of predicting the remainingoil distribution during the late period of development. Before setting up a detailed framework, the geological knowledge such as the depo-sitional mechanism, the distinguishable criterion, the scale of microfacies sandbody, the channel density and the occurring conditions ofspecific sandbodies, etc. are needed to determine the borders of microfacies sandbodies and interpolation for them. In this paper, thewidth-thickness relationship of microfacies sandbodies and the quantitative description of the channel development are presented, and theframework model for Layer-2 in oil member IlV is developed. Such a method could be significant for the detailed reservoir description ofother analogous oilfields.

Key words: Shuanghe oilfiled, fan delta, reservoir rock, geological model