Abstract: In order to clarify the distribution law of oil and gas near the fault in the slope area outside the source of the petroliferous basin, first, the sand ground ratio of well point sand body formation is known in the statistical study area, and the minimum ratio is taken as the minimum value required for oil and gas reservoir sand body, and the distribution area of oil and gas reservoir sand body is trapped, second, the distribution of paleotectonic ridge on the top of sand body formation is obtained through calculation, the overlapping position of the two is determined as the oil and gas transportation path along the lateral migration of the sand body to the fault, third, by calculating the lateral sealing part of the fault and superimposing it with the distribution area of oil and gas reservoir sand body, the superimposed part can be determined as the oil and gas part of fault sand configuration trap. The authors establish a method to predict the favorable parts of oil and gas accumulation near the faults in the slope area outside the source, which predicts the oil and gas coupling parts of oil and gas transmission path and fault sand configuration trap as the favorable parts of oil and gas accumulation. The method is applied to predict the favorable parts of oil and gas accumulation in the Es^1x near Zhaobei fault in Qinan slope area outside the source of Qikou sag, Bohai Bay basin. The prediction results show that there are mainly two favorable parts for oil source accumulation in the Es^1x near Zhaobei fault in Qinan slope area outside the source, which are distributed in the west of Zhaobei fault, which is consistent with the fact that oil and gas in the Es^1x near Zhaobei fault are mainly distributed in the west, indicating that this method is feasible to predict oil and gas accumulation near Zhaobei fault in the slope area outside the source.

Key words: external source slope area, fault, hydrocarbon accumulation, favorable position, prediction method, Qikou sag