基于三角网格的有限差分法叠后逆时偏移(英文)

被引:5
作者
郭书娟
李振春
孙小东
叶月明
滕厚华
李芳
机构
[1] 中国石油大学(华东)地球资源与信息学院
关键词
逆时偏移; 构造倾角; 三角网格; 起伏地表;
D O I
暂无
中图分类号
P631.44 [];
学科分类号
摘要
与其他偏移方法相比,逆时偏移基于精确的波动方程而不是对其近似,用时间外推来代替深度外推。因此,它具有良好的精度,不受地下构造倾角和介质横向速度变化的限制。采用的三角网格差分法最大限度地保持了差分法的简单性,同时兼有有限元法的精确性,可直接用于起伏地表模型的正演模拟和偏移计算而无需对模型做特殊处理。本文首次尝试将三角网格差分法应用于逆时偏移中,模型试算表明了这两种方法的结合具有较好的应用效果。
引用
收藏
页码:115 / 120+157 +157
页数:7
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