论文部分内容阅读
立体层析成像是一种新的地震反射波层析成像方法,能为叠前深度偏移提供较为精确的宏观速度模型。本文研究了立体层析成像的实现方法,包括斜率与走时数据的拾取、离散速度模型构建和初始化、射线参数的确定、斜率和走时及射线计算以及反演问题解法等,建立立体层析成像的算法流程。并通过对Marmousi模型试验,对立体层析成像运行所需的主要参数,如初始速度模型、拾取数据量、离散网格尺寸、速度平滑权重等进行测试和分析,总结这些不同参数对立体层析反演结果的影响规律,用以指导生产实践。
Stereochromatography is a new seismic reflection tomography method that can provide a more accurate macro-velocity model for prestack depth migration. This paper studies the realization of stereoscopic tomography, including the pickup of slope and travel time, the construction and initialization of discrete velocity model, the determination of the ray parameters, the slope and travel time and ray calculation and the solution of inversion problems, so as to establish the three-dimensional tomography Algorithm flow. Through the Marmousi model test, the main parameters needed for the operation of the three-dimensional tomography are tested and analyzed, such as the initial velocity model, the amount of data picked up, the size of the discrete grids, the speed smoothing weights, etc. The results of the three-dimensional tomography The influence law of the inversion result is used to guide the production practice.