Study and application of interlayers in heavy oil reservoirs with edge and bottom water in Bohai A oilfield

The interlayer identification technique of well points based on logging response analysis and the description technique of interlayers between wells based on seismic attribute analysis, the study on sedimentary characteristics and the interlayers of the oil-bearing strata from Minghuazhen formation in heavy oil reservoirs with edge and bot-tom water in Bohai oilfield A oilfield was carried out. The results show that there are 4 types of interlayers in this area, which can be divided into strong occlusion,medium occlusion and weak occlusion. Combined with the numerical simulation method, three types of remaining oil distribution patterns are proposed, including the top area of the secondary bottom water reservoir between oil wells, the unexploited area under the interlayer and the local pure oil area in the interlayer of transition zone. Meantime, the reliability of the interlayer recognition is further verified by combining with the actual well dynamic data, which provides a basis for further exploring the remaining oil in the study area.