Abstract: The main target zone in Liangjialou oilfield is the third section of Shahejie formation. During the exploration and development, it is found that oil reservoir of the second section is scattered in different regions. This paper studies the oil-gas geology and reservoir characteristics of the second section, according to regional exploration data available in this area, and indicates that the second section is typical minisubtle reservoir with primary reverse ridge block screened type and fault-lithology compound one. It is concluded that the oil-gas accumulation is characterized by small structures and faults that control oil-gas migration and petroleum distribution with the more and shallower in the south than in the north. This understanding will be of positive significance for petroleum exploration of the second sections in this area and adjacent regions.

Key words: Shandong province, Boxing, Palaeogene, reservoir type, reservoir formation