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。
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.
出处
《中国石油勘探》
CAS
北大核心
2017年第6期96-100,共5页
China Petroleum Exploration
关键词
准噶尔盆地
多次波机理分析
多次波压制
量化评价
Junggar Basin, analysis of multiple wave mechanism, suppression of multiple wave, quantitative evaluation
