海底新生代礁体下伏构造的校正浅析

Correction of Structure Underlying the Cenozoic Seabed Reef in Seismic Interpretation

通过正演模型,认识到海底礁体的形态和充填速度是引起下伏地震同相轴整体上拉的原因。在不清楚礁体速度的情况下,选取四种不同的速度对构造进行了校正分析;随着礁体充填速度的增加,构造的幅度和面积都在不断减少,甚至消失。因此在确定构造时要考虑礁体的真实速度和厚度,才能给地震勘探解释带来正确的方向,从而减少勘探的风险。

Forward modeling illustreates that the shape and filling velocity of the seabed reef cause the overall pulling of the underlying seismic events.In the case of the velocity of the reef being unsure,four different models of velocity were chosen to correct the structure during interpretation.With the increase in the filling velocity of the reef,the amplitude and the area of the structure decrease,and even disappear.Therefore,the determination of velocity and thickness of the seabed reef is important in seimic interpretation in order to provide the believable exploration target and to reduce the risk of exploration.