地震相模式识别

SEISMIC PHASE BY PATTERN RECOGNITION

地矿部北京计算中心

地震层序内包含着不同的地震相带。地震剖面上对应于不同沉积相带可能呈现出不同的地震相特征,即不同的地震相模式。由地震剖面提取地震层序的地震相特征参量,并通过统计模式识别的方法划分出不同的地震相带,根据地震相带所具有的反射特征并结合钻井资料和其它地质资料可进行沉积相推断解释。对三角洲、冲积扇和湖盆三类陆相沉积地质模型的合成地震记录理论样本进行了分类试验,正确识别率达85％;对实际地震剖面也进行了试验,证明有用于实际资料的前景。

The seismic sequence consists of different seismic phase zones. And the seismic sections corresponding to different depositional facies zones may present different characteristics of seismic phase, i. e. different patterns of seismic phase. The characteristic parameters of seismic phase of seismic sequence are extracted from seismic section and the different seismic phase zones are divided using the statistic pattern recognition approach. Based on the reflection characteristics that the seismic phase zone has and integrated with the drilling data as well as other geological information, the interpretation of sedimentary facies can be performed. The classification experiments with respect to the theoretical samples of synthetic seis-mogram of the geological modelling of delta, alluvial fan and lake basin continental deposition are conducted. The correct recognition rate amounts to 85%. Also, the experiments of actual sections are made, through which the availability of actual data is verifred.