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库车坳陷亚肯北地区地表起伏大,深层特殊岩性地质体分布不均,制约了该区的圈闭落实。常规的圈闭研究均在固定基准面地震数据下开展,而复杂地区基于固定基准面的地震预测深度与实钻深度误差较大,为此,在研究区开展了基于浮动基准面的变速成图技术研究,其结果表明,相对于固定基准面而言,该方法大大地提高了地震预测精度,为复杂地区圈闭研究提供了有力的手段。
The Kuqa Depression Yakinbei area has a large surface undulation and a deep special lithologic geological body is unevenly distributed, which restricts the implementation of traps in this area. Conventional trap studies are carried out under fixed datum seismic data. However, the error between the depth of prediction and the actual drilling depth based on a fixed datum in a complex area is relatively large. Therefore, a velocity mapping based on a floating datum is carried out in the study area The results show that compared with the fixed datum, this method greatly improves the accuracy of earthquake prediction and provides a powerful means for the study of traps in complicated areas.