The distribution of remaining oil at the high water-cut stage in heavy oilfield of Bohai Bay is very complicated. Based on fine geology study and combined with the data of logging, sealed coring and reservoir dynamic analysis, this paper deeply researches the watered-out characteristics and the distribution rule of remaining oil in SZ heavy oilfield guided by the sedimentology and percolation mechanics theory. Based on this, the corresponding strategies for adjustment wells are proposed. Study shows that there is a great difference in watered-out characteristics of different rhythm sand bodies in study area. Reverse rhythm permeability ratio is less than 5, mainly impacted by gravity effect. In the middle and lower part of sand body, watering out is serious; permeability ratio is more than 5, mainly impacted by physical property. In the middle and upper part of sand body, watering out occurs; for positive rhythm and mean rhythm, vertical watered-out characteristics of sand body are mainly influenced by gravity and physical property. In the middle and lower part of sand body, watering out occurs. At present, the remaining oils are mainly distributed in the stagnant zone between the oil wells, both sides of closed fault and the top of thick oil layers with small permeability ratio. The strategies of directional well infilling and horizontal well layering are taken to improve the oil recovery, getting a good potential tapping result.
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