海拉尔盆地贝尔凹陷火山岩电性及地震特征——以巴彦塔拉和贝西北为例

On the logging and seismic characteristics of volcanics in Beier sag of Haila'er basin——A case study of Bayan Tala and the northwest of Beier

海拉尔盆地贝尔凹陷火成岩主要为爆发相、火山沉积相的熔结凝灰岩、凝灰岩,其次是溢流相的中基性安山岩、玄武岩,还发育少量浅层侵入岩.统计结果显示:溢流相火山岩与砂砾岩电性值有明显差别,在地震相上容易识别;爆发相熔结凝灰岩不易识别.安山岩、玄武岩等在地震剖面形态上具有较连续明显的顶底反射界面,内部成层较差、反射杂乱.

The Beier sag features in explosive facies of volcanic tuff, overflowing facies of andesite, basalt, and development of cerrtain shallow intrusive rocks. Statistics show that both facies have substantial differences, which are relatively easier to identify on the seismic facies. In contrast, andesite, basalt, and other shallow layers yield a clear reflection of the top end of the interface,and the internal layer a poor reflection of clutter