新疆石油地质

新疆石油地质 ›› 2007, Vol. 28 ›› Issue (5): 635-639.

• 应用技术 • 上一篇    下一篇

利用面波信息调查表层结构的方法

颜俊华1, 彭文2, 周熙襄2   

  1. 1.西南石油大学 计算机科学学院, 成都 610500;
    2.成都理工大学 信息工程学院, 成都 610059
  • 收稿日期:2006-09-21 修回日期:2007-01-04 出版日期:2007-10-01 发布日期:2020-08-03
  • 作者简介:颜俊华(1971-), 女, 四川峨嵋人, 在读博士研究生, 计算机应用,(Tel) 13688454829(E-mail) pengwen@vip.sina.com.

Investigation of Surface Layer Texture Using Surface Wave Information

YAN Jun-hua1, PENG Wen2, ZHOU Xi-xiang2   

  1. 1. College of Computer Science, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    2. College of Information Engineering, Chengdu University of Technology, Chengdu, Sichuan 610059, China
  • Received:2006-09-21 Revised:2007-01-04 Online:2007-10-01 Published:2020-08-03

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摘要： 面波在天然地震和工程地震中分别被用于探测地球的宏观结构和微观结构,面波是石油地震勘探中的干扰波之一,其实,它也同样携带了地球的表层结构信息。石油勘探关注的低降速带属于速度从上到下递增的正向地层结构。通过面波的正演模型计算可知,在石油地震面波分布的频带范围内,主要是面波的基阶模式。运用p—ω变换,能有效提取出石油地震记录中的面波频散曲线。把表层结构划分成等厚薄层,采用光滑度约束,就能通过基阶的面波频散曲线反演出低降速带的横波速度,从而建立表层的结构模型。

关键词: 地震, 面波, 频带, 正演, 反演

Abstract: Surface wave is separately used to explore the macro and micro structures of the earth in earthquake and engineering seismology. Surface wave, one of disturbing waves in petroleum exploration, carries also the information of surface layers in the earth. The low-velocity layer that concerned by petroleum prospecting belongs to the forward layer structure increasing from the top down. The forward model computation shows that the surface wave mainly exists in the range of base model. With p-ωtransform, the dispersion curves of petroleum seismic records can be effectively picked up. By dividing the surface layer structure into isopach thin layer and adopting smooth restriction, the basic dispersion curves can be inversed into the shear velocity of low-velocity layer, thus developing the structural model of surface layer.

Key words: Seismology, surface wave, wave band, forward modeling, inversion

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