Forward modeling for research of main source

B well field in Bohai Bay basin is affected by bidirectional sources,and its main source direction is uncertain due to the lack of research.In this study,forward modeling was applied to the study of the main source.The models were designed to simulate these two kinds of main control sources,verify the direction of the main source and the distribution of the reservoir by comparing the modeling re-sponse with the actual seismic reflection characteristics.In order to further demonstrate the conclusion that the western part of B well field is mud rich,the authors established different models by giving different wave impedance differences between the near source and the end of the progradation,and carried out forward modeling.Based on comparing the sandbody characteristics, the actual seismic re-flection characteristics and the forward modeling responses,the authors have reached the conclusion that the oil-bearing sandstones of the lower D2 Formation in B well is the distal end of progradation that comes from northwestern Shijiutuo Uplift,and Shijiutuo Uplift is the main source of the study area,which is the potential target for the high quality reservoir.