基于胜利典型地质模型的波动方程地震波照明分析研究
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摘要
地震波照明分析技术以地震波传播理论为基础,面向特定地质目标进行观测系统设计来得到最佳照明的地震数据,进而得到最佳的成像效果。本文定义了最佳照明数据体、最佳照明的概念,指出对特定速度场而言,最佳观测系统是客观存在的,最佳观测系统设计的目的就是找到逼近该客观存在的最好的观测系统。本文基于胜利油田典型地质模型研究了波动方程地震波照明,分析照明阴影区的形成原因,结合对模型数据实验的效果分析,对单程波和双程波照明的特点和应用范围进行了探讨,指出单程波照明具有计算优势,双程波照明能够更好地保持波传播特点的优势。
Seismic wave illumination analysis technique takes seismic wave transmission theory as basis, carries out geometry design oriented to special geologic target to get best illuminated seismic data and further obtain optimum imaging result. The paper defined optimum illuminated data volume and conception of optimum illumination, pointed out that there exists objectively the optimum geometry for special velocity field and goal of design of optimum geometry is to find out the most approximation to the best geometry objectively existed. Based on typical geological model in Shengli Oilfield, the paper studied wave equation illumination, analyzed the forming reason of illuminated shadow and discussed the characters and application realm of illumination by one-way and two-way waves in combination with analyzing the experimental results of model data, pointing out that illumination by one-way wave has computational superiority and illumination by two-way wave can better preserve the feature of wave propagation.
Seismic wave illumination analysis technique takes seismic wave transmission theory as basis, carries out geometry design oriented to special geologic target to get best illuminated seismic data and further obtain optimum imaging result. The paper defined optimum illuminated data volume and conception of optimum illumination, pointed out that there exists objectively the optimum geometry for special velocity field and goal of design of optimum geometry is to find out the most approximation to the best geometry objectively existed. Based on typical geological model in Shengli Oilfield, the paper studied wave equation illumination, analyzed the forming reason of illuminated shadow and discussed the characters and application realm of illumination by one-way and two-way waves in combination with analyzing the experimental results of model data, pointing out that illumination by one-way wave has computational superiority and illumination by two-way wave can better preserve the feature of wave propagation.
引文
[1]Schncider W Aand Winbow G A.Efficient and accu-rate modeling of 3-D seismic illumination.ExpandedAbstracts of69th SEG Mtg,1999,633~636
[2]Xiao-Bi Xie,Shengwen Jin,Ru-Shan Wu.Wave-equa-tion-based seismic illumination analysis.Geophysics,2006,71(5):169~177
[3]Ru-Shan Wu,Ling Chen.Directional illumination anal-ysis using beamlet decomposition and propagation.Ge-ophysics,2006,71(4):147~159
[4]冯伟,吴如山,王华忠等.面向目标的小束源照明和成像.地球物理学进展,2006,21(3):802~808
[5]韩文功,沈财余.陆相断陷盆地复杂地质模型建立与正演模拟.石油地球物理勘探,2006,41(4):396~401
[2]Xiao-Bi Xie,Shengwen Jin,Ru-Shan Wu.Wave-equa-tion-based seismic illumination analysis.Geophysics,2006,71(5):169~177
[3]Ru-Shan Wu,Ling Chen.Directional illumination anal-ysis using beamlet decomposition and propagation.Ge-ophysics,2006,71(4):147~159
[4]冯伟,吴如山,王华忠等.面向目标的小束源照明和成像.地球物理学进展,2006,21(3):802~808
[5]韩文功,沈财余.陆相断陷盆地复杂地质模型建立与正演模拟.石油地球物理勘探,2006,41(4):396~401
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