扇三角洲前缘沉积微相平面预测方法OACHSSCD

The Yingcheng Formation in the Wangfu sag of the study area developed a fan delta-lacustrine sedimentary system.The fan delta front is primarily composed of three depositional microfacies:subaqueous distributary channels,interdistributary bays,and sheet sands,each exhibiting distinctive well log and seismic reflection characteristics.Addressing the challenge of plan-view prediction of fan delta front depositional microfacies,this study proposes a comprehensive prediction method that integrates seismic frequency boosting,waveform clustering,and acoustic impedance section analysis.The methodology was applied and verified using the Yingcheng Formation in the Wangfu area as a case study.Application results demonstrate that the predicted results show high geological consistency,with significantly enhanced lateral continuity and interpretability of sand bodies.The results clearly reveal the northward progradation of the fan delta front depositional system during the first member of the Yingcheng Formation.This technical workflow effectively integrates seismic lateral information with geological and well logging vertical information,providing a practical technical pathway for fine prediction of fan delta front depositional microfacies in areas with low well control density.