某工区基于地震照明技术的观测系统分析及优化
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摘要
地震照明分析是认识和研究地震数据采集时能量在地下地质结构中分布的有效手段,通过对先验的目标地质模型进行有效的地震照明分析,可清楚地识别地震波的能量分布特征,用以指导观测系统设计及提高成像质量。根据某工区崎岖海底原始数据,建立了一个三维地震地质模型,基于三维射线追踪原理对目标层进行照明分析,找出影响地震成像效果的原因;并分析观测方向、炮间距及道间距对照明效果的影响,从而可以得到面向目标的最佳观测系统。
Seismic illumination analysis was an effective means to recognize and study the energy distribution in underground geological structure from seismic data acquisition.Through effective analysis on the illumination degree of the aimed transcendental geologic model,the characteristics of energy distribution of seismic waves could be clearly identified to guide the design of observing systems and improve image quality.According to the original data collected from a rugged subsea in a certain work area,a 3D seismic geological model is established.By the analysis on the illumination of the target layer based on 3D ray tracing,the cause of affecting seismic imaging is found out and the observation direction,shot interval and track pitch on the influence of lighting effect are analyzed,the best observation system is obtained for the target.
Seismic illumination analysis was an effective means to recognize and study the energy distribution in underground geological structure from seismic data acquisition.Through effective analysis on the illumination degree of the aimed transcendental geologic model,the characteristics of energy distribution of seismic waves could be clearly identified to guide the design of observing systems and improve image quality.According to the original data collected from a rugged subsea in a certain work area,a 3D seismic geological model is established.By the analysis on the illumination of the target layer based on 3D ray tracing,the cause of affecting seismic imaging is found out and the observation direction,shot interval and track pitch on the influence of lighting effect are analyzed,the best observation system is obtained for the target.
引文
[1]Schncider W A,Winbow G A.Efficient and accurate modeling of3-Dseismicillumination[J].Expanded Abstracts of69th SEG Mtg,1999:633～636.
[2]Xiao Bi-xie,Sheng Wen-jin,Ru Shan-wu.Wave-equation-based seismicillumination analysis[J].Geophysics,2006,71(5):169～177.
[3]蔡东地,张进铎.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]张钋,刘洪.射线追踪方法的发展现状[J].地球物理学进展,2000,15(1):36～44.
[7]董良国.逆掩推覆构造的地震波照明与观测系统优化[J].石油物探,2006,45(1):40～48.
[2]Xiao Bi-xie,Sheng Wen-jin,Ru Shan-wu.Wave-equation-based seismicillumination analysis[J].Geophysics,2006,71(5):169～177.
[3]蔡东地,张进铎.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]张钋,刘洪.射线追踪方法的发展现状[J].地球物理学进展,2000,15(1):36～44.
[7]董良国.逆掩推覆构造的地震波照明与观测系统优化[J].石油物探,2006,45(1):40～48.
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