深度域波动方程偏移速度建模方法及应用

Method for building wave equation migration velocity model in depth domain and its application

针对波动方程叠前深度偏移中重要的速度模型问题,研究了一套三维速度建模方法和软件。该方法以波动理论为基础,采用批量计算和计算机可视化交互处理相结合的方法,进行时间偏移速度分析、时间坐标和深度坐标的深度偏移层速度分析,由此可建立时间域及深度域的层速度模型,为三维波动方程叠前深度偏移提供合理、可靠的偏移速度模型。经实际的三维地震资料处理,证实了这套三维速度建模方法和软件的有效性。

Taking aim at solving the important velocity model problem in wave equation pre-stack depth migration, This paper studies the method and software of building 3D migration velocity model. This method is based upon the wave theory, and combines the batch computing and visual interactive processing to analyze the time migration velocity, especially the depth migration velocity in time coordinate and depth coordinate, respectively. According to the velocity analysis results, the interval velocity model is built in time and depth domain in order to provide the rational and reliable velocity model for the 3D wave equation pre-stack depth migration. The real 3D seismic data processing proves the validity of the velocity model method and software.