准噶尔盆地腹部多次波机理分析及压制效果量化评价

doi:10.3969/j.issn.1672-7703.2017.06.011

摘要/Abstract

摘要： 反射波地震勘探中，多次波是一类常见而且对有效信息影响严重的干扰波，多次波的存在会降低地震资料信噪比，影响地震成像的真实性和可靠性。准噶尔盆地腹部石炭系上覆侏罗系煤层为强阻抗界面，产生的多次波严重影响了石炭系内幕成像效果，因此多次波的压制是深层成像处理的关键之一。从理论模型和实际资料两个方面对准多次波进行识别，采用滤波方法对多次波进行压制处理，并采用量化指标对多次波的压制效果进行评价，为优化多次波处理方法的选择提供指导，对提高石炭系成像效果有积极意义。

关键词: 准噶尔盆地, 多次波机理分析, 多次波压制, 量化评价

Abstract: In reflection seismic exploration, multiple waves are common and noises and seriously affect effective signals. Multiple waves can reduce the S/N ratio of seismic data and reduce the fidelity and reliability of seismic imaging. In deep Junggar Basin, the Jurassic coal layer overlying on the Carboniferous System is an interface with strong acoustic impedance, and the multiple waves reflected by the coal layer seriously affect the imaging effect inside the Carboniferous System; therefore, suppression of the multiple waves is very important for image processing in deep Junggar Basin. This paper identifies multiple waves based on theoretical model and field data, suppresses multiple waves by filtering method, and evaluates the suppression effect with quantitative indicators. This can provide guidance for selecting multiple wave suppression methods and improve the imaging effect of the Carboniferous System.

Key words: Junggar Basin, analysis of multiple wave mechanism, suppression of multiple wave, quantitative evaluation

中图分类号:

P631.41

张录录, 王正军, 夏建军, 苏卫民, 张秀丽, 郭再平. 准噶尔盆地腹部多次波机理分析及压制效果量化评价[J]. 中国石油勘探, 2017, 22(6): 96-100.

Zhang Lulu, Wang Zhengjun, Xia Jianjun, Su Weimin, Zhang Xiuli, Guo Zaiping. Mechanism analysis and quantitative evaluation on suppression of multiple wave in deep Junggar Basin[J]. China Petroleum Exploration, 2017, 22(6): 96-100.

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