新疆石油地质

新疆石油地质 ›› 2010, Vol. 31 ›› Issue (2): 208-209.

• 讨论与争鸣 • 上一篇    下一篇

基于褶积模型的地震振幅含义讨论

刘振东1, 张玺科2, 许杰2, 张珩智3   

  1. 1.中国地质大学,武汉 430074;
    2.中国石化 勘探开发研究院,北京 100083;
    3.北京邮电大学,北京 100876
  • 收稿日期:2009-12-04 发布日期:2020-09-17
  • 作者简介:刘振东(1968-),男,河南方城人,高级工程师,在读博士研究生,地球物理,(Tel)13911087953(E-mail)lzd777@163.com.

Discussion of the Meaning of Convolution Model-Based Seismic Amplitude

LIU Zhen-dong1, ZHANG Xi-ke2, XU Jie2, ZHANG Heng-zhi3   

  1. 1. China University of Geosciences, Wuhan, Hubei 430074, China;
    2. Research Institute of Petroleum Exploration and Development, Sinopec, Beijing 100083, China;
    3. Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2009-12-04 Published:2020-09-17

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摘要： 根据褶积模型,反射波振幅是单个反射系数和子波褶积的叠加,一次反射地震记录的振幅从本质上说是有限带宽的反射系数,地震剖面的同相轴表示了地层的波阻抗差界面,并不是等时的,结合地层对比的依据说明波阻抗并不能完全反映地层的岩性,仅用波阻抗预测岩性是不准确的。在此基础上,结合模型和实例说明,同相轴的尖灭并不表示储集层的尖灭。

关键词: 褶积模型, 反射波振幅, 反射系数, 反射同相轴, 合成地震记录

Abstract: Based on convolution model, the reflected wave amplitude is the superposition of single reflection coefficient and wavelet convolution. The amplitude of primary seismic reflection seismogram can be regarded as the limited bandwidth reflection coefficient in nature, while the event of seismic profile stands for the interface of wave impedance contrast of layers, which is not consistent with deposition interface. This paper illustrates wave impedance can not completely reflect the lithology of strata by combining with stratigraphic correlation, so it is inaccurate to only use the wave impedance for prediction of lithology. Also, this paper indicates from the model and cases that the pinchout of event does not express the pinchout of reservoir.

Key words: convolution model, reflected wave amplitude, reflection coefficient, reflection event, synthetic seismogram

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