天然气地球科学

• 天然气勘探 • 上一篇    下一篇

利用谱蓝化和有色反演分辨薄煤层

杨瑞召,赵争光,马彦龙,霍超,李洋   

  1. 中国矿业大学(北京)地球科学与测绘工程学院,北京100083
  • 收稿日期:2012-06-07 修回日期:2012-07-09 出版日期:2013-02-10 发布日期:2013-02-10
  • 通讯作者: 杨瑞召yrz@cumtb.edu.cn. E-mail:yrz@cumtb.edu.cn.
  • 作者简介:杨瑞召(1964-),男,河南洛阳人,副教授,博士,主要从事地震资料解释、地震波反演方法、微地震信号处理和非常规资源评价等研究.E-mail:yrz@cumtb.edu.cn.
  • 基金资助:

    国家重大基础研究计划项目(编号:2009CB724601)资助.

Thin Coal Bed Resolution by Using Seismic Spectral Blueing and Colored Inversion

YANG Rui-zhao, ZHAO Zheng-guang, MA Yan-long, HUO Chao, LI Yang   

  1. School of Geoscience and Surveying Engineering,C hina University of Mining and Technology, Beijing 100083, China
  • Received:2012-06-07 Revised:2012-07-09 Online:2013-02-10 Published:2013-02-10

摘要:

基于模型反演在实际应用中,存在反演结果过度模型化、反演可能扩展到地震频带以外以及估计的子波不准确导致反演误差较大等不足,谱蓝化和有色反演可有效白化地震子波,在地震带宽内改善频谱,提高地震分辨率,同时确保谱蓝化后的地震数据保持地下地层的真实反射系数。设计优化了谱蓝化和有色反演技术流程并将其应用在煤层气勘探三维地震资料中,有效地提高了反演波阻抗体对薄煤层的分辨能力。同时,反演结果被用于辅助精细构造解释薄煤层,纠正了单纯利用地震原始数据体解释层位出现的错误。

关键词: 谱蓝化, 有色反演, 相对波阻抗, 薄层, 算子

Abstract:

It has proved that the model simulated by seismic inversion in practice is often too much model-dependent and sometimes go beyond the seismic band limit as well as be erroneous for using inaccurate estimated wavelet.Seismic spectral blueing and colored inversion can effectively whiten the seismic wavelet to enhance seismic resolution and ensure that the blued seismic data show the true reflectivity of the subsurface without going beyond the seismic band limit.In this paper,we design the optimal workflow of seismic spectral blueing and colored inversion and use it to the 3D seismic data acquired for coalbed methane exploration.The results show that application of spectral blueing and colored inversion improves the seismic resolution of thin coal beds.Simultaneously,the colored inversion acoustic impedance is applied to aid at the interpretation of thin coal beds,which removes the erroneous interpretation occurred during previous interpretation using merely the original seismic data. 

Key words: Spectral bluing, Colored inversion, Relative acoustic impedance, Thin bed, Operator

中图分类号: 

  • TE132.1+4

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