Based on the analysis of past reservoir classification,according to the actual need of finding oil on sandstone reservoir in synclinal area of depression basin,and in term of the fundamental principle of conventional reservoir generation,this paper has proposed a ternary classification composed by three factors of structure,fault and lithology.

The Application Research of Fuzzy Cluster Analysis Method in Reservoir Classification;

The oil/gas reservoir types in Wuerxun-Beier faulted-down depression and their exploration methods;

Furtherly,according to structural positions and related reservoir types,hydrocarbon accumulation models can be divided into five types,including the main uplift body,the uplift steep slope,the uplift gentle slope,the inter(intro)-sag highland and th.

The main reservoir types were anticlinal reservoir, fault reservoir, lithologic reservoir, heavy-oil sealing reservoir and composite reservoir in Wuerhe-Xiazijie Area, and heavy-oil sealing reservoir was a typical one.