摘要
自然伽马曲线是反映钻孔岩石放射强度的重要资料。在伴有岩浆活动影响的地层中,常常形成放射性物质的富集或降低,因而在自然伽马测井曲线上呈现出异常反映。通过分析宣东矿区钻孔自然伽马测井曲线异常形成的原因,总结出广泛分布于全区的箱形、剑形和台阶型曲线异常等典型特征与钻孔剖面的对应关系,并据此对该区进行了岩性划分及地层对比。
The gamma-ray trace is important information to reflect borehole strata rock radioactivity.In strata accompanied by igneous activities,frequently caused radioactive substances enrichment or decreasing and presented abnormal reflection on gamma-ray traces.Through analysis of gamma-ray trace anomaly forming origin in the Xuandong mine area boreholes,summarized typical characteristics of box,sword and bench formed logging traces vastly distributed in the whole area and their corresponding relationship with borehole sections,on these grounds carried out lithologic division and strata correlation in the area.
出处
《中国煤炭地质》
2010年第B08期94-96,110,共4页
Coal Geology of China
关键词
自然伽马异常
地层对比
标志层
gamma-ray anomaly
strata correlation
index bed
