Abstract: G block,located at the gentle slope of GG sag,Erlian Basin,is of complex geologic setting,for it is full of multiple sedimentary microfacies,and the microfacies are closely cor- relative with the oil-bearing degree of reservoir.In terms of geology setting and the interpretation results in G block and in combination with the physical properties of reservoir,the four characters of braided channel and distributary channel in Tenggeer Formation is analyzed.The coincidence rate of log- ging interpretation is raised after the non-electrical data is used to distinguish permeable horizon from compact layer, and the intrusion characters of the dual induction-octo-lat- erolog curve.