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本文介绍了以两种非线性优化方法为基础的进行层速度估计的方法,即:快速模拟退火法(VFSA)和基因遗传法(GA)。采用深度偏移后的叠前地震资料来确定目标函数。本反演问题包含了优化经偏移后相邻炮点记录间反射面的横向一致性。实际上,速度分析中的正常时差校正可用叠前深度偏移来代替。当每
This paper presents a method to estimate the layer velocity based on two nonlinear optimization methods: fast simulated annealing (VFSA) and genetics (GA). The depth-shifted pre-stack seismic data is used to determine the objective function. The inversion problem includes the optimization of the lateral consistency of the reflection surface between the neighboring shots after migration. In fact, normal time difference correction in velocity analysis can be replaced with prestack depth migration. When every