In order to study the influence of intercalationdistribution pattern in the mainreservoirof Bohai oilfieldHon the distribution of remaining oil and provide a strong basis for adjusting and tapping the potential of the oilfield, indoor core water flooding experiments under different intercalationdistribution patterns were carried out according to similar principles. The experimental results showedthat when the water injection welldrilled ofthe intercalation, the remaining oilwasrelatively rich in the area near the production well and the interlayer extension direction. With the extension of intercalationdistribution, the slower the water cut risedafter the water breakthrough of the oil production well, the better the oil displacement effectwould be. When theoilproduction welldrilled ofthe intercalation, the remaining oilwas concentrated in the upper area near the flow unit of the production well, and the intercalationhas little influence on the final recovery ratio.The research results were put into field test, and contributed good effect to remaining oil development.It can serve as an important reference for adjustment of similar offshore oilfields.