自然伽马测井曲线在邯郸地区井田煤岩层解释中的应用  

Application of Gamma-ray Logging Trace in Coal,Rock Strata Interpretation in Handan Area

作　　者：马立凯 

机构地区：[1]河北省煤田地质局水文地质队,河北邯郸056201

出　　处：《中国煤炭地质》2012年第6期60-62,共3页Coal Geology of China

摘　　要：通过对邯郸地区电阻率、自然伽马和伽马伽马等测井曲线形态特征的分析,发现伽马强度的大小与岩石颗粒成反比,与岩层泥质含量成正比,这为岩性解释及岩层划分提供了依据,如:煤层自然伽马射线强度为最低,其次是石灰岩、粗砂岩。利用自然伽马曲线幅值的大小、形态特征以及特殊的异常标志进行对比,可作为划分该区石千峰组二段和一段地层分界线的依据,特别是煤层的顶板为炭质泥岩时,电阻率值和伽马伽马值与煤层差别不大,只有利用自然伽马才能准确划分煤层的顶界面。另外自然伽马曲线在该地区可有效地解释岩性、确定煤层厚度及划分地层界线。Through analyses of resistivity,gamma-ray and gamma-gamma logging traces configuration characteristics in the Handan area,have found the magnitude of gamma-ray intensity is in direct proportion to rock grain-size,thus provide bases for lithologic interpretation and rock strata partition,such as: coal seam gamma-ray intensity is the lowest,secondly limestone,grit stone etc.Using magnitude of gamma-ray trace peak value,configuration characteristics and special anomaly identification mark to carry out correlation can be the partition basis of boundary between the first and second members in the Shiqianfeng Formation.Especially,when the coal roof is carbargillite,differences of resistivity and gamma-gamma values of coal roof and coal seam are moderate,so that only through the using of gamma-ray can distinguish coal roof interface.Besides,gamma-ray trace can interpret lithology,determine coal seam thickness and divide strata boundary effectively.

关 键 词：测井曲线 地层对比 自然伽马 邯郸地区 

分 类 号：P631.8[天文地球—地质矿产勘探]