海洋地震勘探中地震波、鬼波综合效应分析与应用
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摘要
鬼波是影响海洋地震资料采集质量的重要因素之一,经过海水表面反射的鬼波与海底反射波相互叠加。“地震波、鬼波的综合效应”受很多因素的影响,文中从传播路径、传播时间等方面讨论了地震波与鬼波的综合效应。通过计算机模拟了二者的综合效应,与实测资料进行了对比,其幅频特性中陷波点、幅度等特性非常接近。结合水合物勘探的目的,文章探讨了基于识别BSR的勘探频率要求震源和电缆的最佳沉放深度,并通过实际应用验证了理论推算的正确性。
Ghost reflection is one of the significant factors which affect the seismic data quality in marine survey.The ghost reflected from the sea surface and the reflection from the sea bottom overlay on each other.The combinative effect of seismic wave and ghost is controlled by many factors.The paper discusses the synthesized impact from the point of their traveling path and time.The computer modeled result has been compared with the true field data and both the data show similar characters in the lost frequency point and amplitude.Considering the exploration of gas hydrate,this paper describes the best depth for guns and streamer required by BSR and the theory has been verified by practical use.
Ghost reflection is one of the significant factors which affect the seismic data quality in marine survey.The ghost reflected from the sea surface and the reflection from the sea bottom overlay on each other.The combinative effect of seismic wave and ghost is controlled by many factors.The paper discusses the synthesized impact from the point of their traveling path and time.The computer modeled result has been compared with the true field data and both the data show similar characters in the lost frequency point and amplitude.Considering the exploration of gas hydrate,this paper describes the best depth for guns and streamer required by BSR and the theory has been verified by practical use.
引文
[1]张明,伍忠良.天然气水合物BSR的识别与地震勘探频率[J].海洋学报,2004,26(4):80-88.
[2]张光学,黄永样,陈邦彦.海域天然气水合物地震学[M].北京:海洋出版社,2003.
[3]刘建磊,王修田.海上地震虚反射相位剔除法反褶积[J].海洋地质与第四纪地质,2002,22(4):117-121.
[2]张光学,黄永样,陈邦彦.海域天然气水合物地震学[M].北京:海洋出版社,2003.
[3]刘建磊,王修田.海上地震虚反射相位剔除法反褶积[J].海洋地质与第四纪地质,2002,22(4):117-121.
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