新疆石油地质

新疆石油地质 ›› 2005, Vol. 26 ›› Issue (3): 313-315.

• 应用技术 • 上一篇    下一篇

正交地震道在二维地震岩性解释中的应用

李毓丰1, 桑洪1, 马全天1, 王成林2, 金英爱1, 刘虎1   

  1. 1.中国石油塔里木油田分公司勘探开发研究院, 新疆库尔勒 841000;
    2.石油大学资源与信息学院北京102249
  • 收稿日期:2004-11-05 出版日期:2005-06-01 发布日期:2020-11-23
  • 作者简介:李毓老(1965-),男,河北保定,工程师,地球物理勘探,(Tel)0996-2172242(E-mail)lixuf-tlm@petrochina.com.cn.

Application of Orthogonal Seismic Trace to 2D Seismic Lithologic Interpretation

LI Yu-feng1, SANG Hong1, MA Quan-tian1, WANG Cheng-lin2, JIN Ying-ai1, LIU Hu1   

  1. 1. Rscarch Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Kora, Xinjiang 841000, China;
    2. Institute of Resource and Information, University of Petroleum, Beijing 102249, China
  • Received:2004-11-05 Online:2005-06-01 Published:2020-11-23

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摘要： 正交地震道建立在复地震道的概念之 上,与实地震道构成复地震道的虚部和实部。对实地震道进行90相移滤波得到正交地震道的同时,地震子波的形态由零相位子波变为不对称子波。因此,正交地震道能突出反映实地震记录中某些模糊.朦胧的振幅信息。一般在常规显示的剖面中,二者没有明显区别,仅有90°相位差。当采用合适的显示参数后,有时振幅差异性较明显。在二维偏移地震剖面及其正交地震道剖面上将对应层段的振幅值进行对比解释,平面上找出振幅异常区，即为可能的岩性异常体的分布范围。笔者用该方法在塔里木盐地塔中32井以北、以西志留系内幕发现了一个振幅异常分布区,该异常与塔中32井.塔中34井钻探结果吻合较好。

关键词: 正交地震道, 实地震道, 岩性异常体, 振幅, 塔中32井

Abstract: The orthogonal seismic tmace set up on the concept of complex seismic trace is combined with the real seismic trace to form the imaginary part and the real part of the complex seismic trace. Though the phase shift of 90to real seismic trace, the orthogonal seismic trace is taken, and the shape of the seismic wavelet turns from the zero-phase wavelet to the unsymmetrical wavelet. So the orthogonal seismic trace can reflect clearly some fuzzy and dim amplitude information in the record of the real seismic trace. Generally in the routine display profile, orthogonal seismic trace and real seismic trace have not obvious dfference but 90° phase diference. After the suitable display parameters are adopted, the diference in amplitude becomes relatively obvious. On the 2D offset seismic profile and its orthogonal seismic trace profile, comparison and explanation of the ampltude value corrsponding to the same interval are conducted in order to find out the abnormal amplitude area in plane, ie. the distribution range of possible lithologic anomalous body. By means of this method, one abnormal amplitude ditribution area is found in Silurian gystem, the west and north of Well TZ32 in Tarim basin. The anomaly well matches the driling results of Well TZ34 and Well TZ32.

Key words: orthogonal seismic trace, real seismic trace, lithologic anomalous body, amplitude, Well TZ32

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