地震时间剖面上的伴随相位和次生相位

Accompanying and secondary events in seismic time section

本文利用模型计算结果和一些试验资料,对地震时间剖面上的反射同相轴与地下反射界面的关系进行了研究。由于受地震子波有限的频带宽度和目前地震资料处理技术的限制,在地震时间剖面上会形成一些“伴随相位”和“次生相位”,有时这些相位被误认为反射层位而给出错误的解释结果。为此,本文通过对试验资料的分析,阐明了它们产生的原因,并提出了削弱和识别这些假象的方法。

With the use of model computation results and experimental data,I analyse the correlation between reflection events in a seisnic section and subsurface reflectors. Accompanying and secondary events often occur in seismic time sections because of restrictions of wavelet bandwidth and present seismic data processing technique. These events sometimes are taken for reflection horizons to cause wrong interpretation. On the basis of analysing experimental data.I explain both the reason why these events occur and the way to reduce and to identify them.