【摘要】 车镇凹陷北部陡坡带中浅层近岸扇体埋藏浅,储集性能好,勘探的关键问题是准确落实构造形态和识别有利盖层发育位置。本文通过对中浅层近岸扇体进行正演模拟,剖析了速度陷阱产生的原因,理清了地震反射与实际地层之间的定量对应关系;结合构造变速成图技术,完成了砂砾岩体构造的恢复;采用井震时频分析精细划分扇体内幕旋回,进一步明确了有利盖层的层序特征。应用此方法的结果表明:变速成图后构造圈闭更加落实,井震时频分析技术可有效指导砂砾岩体内幕旋回的划分,确定有利盖层发育位置。更多还原

【Abstract】 The near-shore fans in the steep zone of north Chezhen Sag have the characteristics of shallow burial depth and excellent reservoir performance,the key factors which affect the exploration in this areas are confirmation of the structure shape and the recognition of location of the seal layer’s development.By conducting forward modeling for the near-shore fans,the reason for generation of the velocity pitfall was analyzed,the quantitative corresponding relationship between seismic reflection and real strata were understood,by integrated with structure variable-velocity mapping technique,the recovery of the gravel bodies was completed,the inner cyclones inside the fans were classified by using well-seismic time-frequency analysis,so the sequence characteristics of the favorite seal layer were further understood.The application results of the technique show that the structure trap by variable-velocity mapping was further confirmed,well-seismic time-frequency analysis technique could effectively guide the classification of rubble body inner cyclones,and determine the location of the favorite seal layer’s development.更多还原