崎岖海底下伏地层的地震波照明分析
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摘要
通过地震波照明分析可以准确地认识和研究地震波能量在地下的分布,所以基于目标模型的射线追踪地震波照明分析,可快速准确地识别工区内地震波的能量分布特征,同时可以指导实际观测系统设计及提高工区地震成像质量。由于崎岖海底会导致地震波在传播时的射线偏折,增加了地震采集和处理的难度,所以建立了一个针对中国南海某工区的三维地震地质模型,并基于三维射线追踪原理对目标层进行照明分析,找出影响该工区地震成像效果的原因,从而指导观测系统的设计和优化。通过面向目标的照明分析可以找到最佳的加密激发点位置,从而得到更好的采集质量。
Seismic illumination analysis could accurately understand and study the distribution of seismic wave energy in the ground,so the target-based model of ray tracing seismic illumination analysis could be quickly and accurately identify the seismic energy distribution in the work area,and could also be used to guide the design of observing system and improve seismic imaging quality in the work area.The rough sea bottom would cause the ray deflection in the seismic wave propagation,it increased the difficulty of seismic data acquisition and processing.Therefore a three-dimensional seismic geological model was established for a work area in South China Sea,and based on principles of three dimensional ray tracing target zone,its illumination was analyzed to identify the effect of the work area of finding the causes of influencing the seismic imaging to guide the design and optimization of observing systems.The result shows that the goal-oriented analysis can be excited to find the best position of encryption for obtaining better capture quality.
Seismic illumination analysis could accurately understand and study the distribution of seismic wave energy in the ground,so the target-based model of ray tracing seismic illumination analysis could be quickly and accurately identify the seismic energy distribution in the work area,and could also be used to guide the design of observing system and improve seismic imaging quality in the work area.The rough sea bottom would cause the ray deflection in the seismic wave propagation,it increased the difficulty of seismic data acquisition and processing.Therefore a three-dimensional seismic geological model was established for a work area in South China Sea,and based on principles of three dimensional ray tracing target zone,its illumination was analyzed to identify the effect of the work area of finding the causes of influencing the seismic imaging to guide the design and optimization of observing systems.The result shows that the goal-oriented analysis can be excited to find the best position of encryption for obtaining better capture quality.
引文
[1]Schncider W A,Winbow G A.Efficient and accurate modeling of 3-Dseismicillumination[J].Expanded Abstracts of 69th SEG Mtg,1999:633～636.
[2]Xie Xiao-Bi,Jin Sheng-wen,Wu Ru-Shan.Wave-equation-based seismic illumination analysis[J].Geophysics,2006,71(5):169～177.
[3]蔡东地,张进铎,蔡锡伟,等.火成岩区二维地震正演及照明分析技术应用[J].勘探地球物理进展,2009,32(5):356～361.
[4]吕公河,尹成,周星合,等.基于采集目标的地震照明度的精确模拟[J].石油地球物理勘探,2006,41(3):258～261.
[5]单联瑜,刘洪,匡斌,等.基于胜利典型地质模型的波动方程地震波照明分析研究[J].石油地球物理勘探,2009,44(1):1～6.
[6]汪勇,顾汉明,范宝仓.某工区基于照明技术的观测系统分析及优化[J].石油天然气学报,2010,32(3):59～64.
[2]Xie Xiao-Bi,Jin Sheng-wen,Wu Ru-Shan.Wave-equation-based seismic illumination analysis[J].Geophysics,2006,71(5):169～177.
[3]蔡东地,张进铎,蔡锡伟,等.火成岩区二维地震正演及照明分析技术应用[J].勘探地球物理进展,2009,32(5):356～361.
[4]吕公河,尹成,周星合,等.基于采集目标的地震照明度的精确模拟[J].石油地球物理勘探,2006,41(3):258～261.
[5]单联瑜,刘洪,匡斌,等.基于胜利典型地质模型的波动方程地震波照明分析研究[J].石油地球物理勘探,2009,44(1):1～6.
[6]汪勇,顾汉明,范宝仓.某工区基于照明技术的观测系统分析及优化[J].石油天然气学报,2010,32(3):59～64.
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