【摘要】 以波形分类为基础的地震相分类研究可以有效筛选并快速逼近有利勘探目标,为了进一步明确有意义地震信号横向变化的地质意义,有必要在优选的有利地震相类型中开展再分类研究,以明确有利勘探目标区的地质变化细节,为井位部署提供直接依据。定量地震相分析是地震相再分类研究的前提,而地震资料品质和分辨率是决定地震相分类精度的基础。通过实际应用指出,初次的相对较粗的地震相分类研究可以有效地区分出了河道、决口扇、天然堤、河漫滩等沉积亚相,而针对刻画出的河道的再次地震相分类研究则可以有效地区分出了边滩、心滩和主河道砂体等沉积微相,并初步证实了地震相再分类研究在客观刻画地质体细节方面的优势。认为地震波形分类的再分类研究可以有效指导岩性油气藏的勘探与开发。更多还原

【Abstract】 Seismic facies classification based on seismic waveform division can effectively select and quickly recognize favorable exploration targets.In order to comprehensively understand the geological implication of the transversal variety of seismic signals,it is necessary to reclassify the facies of the preferred seismic facies,which will clearly display the geology detail of the favorable exploration target and directly provide reference to well site deployment.Quantitative analysis of seismic facies classification is the premise of reclassification of seismic facies,and the quality and resolution of seismic data determine the precision of seismic facies classification.In application,the first coarse seismic facies classification effectively identified the channel,crevassesplay,natural levee,alluvial flat and other subfacies etc,and the second fine reclassification aimed to the classified channel further identified the lateral bar,midchannel bar,main channel sand body and other microfacies of a fluvial channel.It shows the predominance of the reclassification of seismic facies in finely describing the geology body.更多还原