数字测井技术在煤田地质勘探中的应用

Application of the Numeral Logging Technique in the Coalfield Geological Exploration

利用数字测井技术对靖宇县的主要煤田进行了大量的地质勘探测量。经实测表明,含煤地层在测井上具有特殊的响应特征,其中煤层表现为低密度、低伽玛和高电阻的特征根据测井响应特征还可以确定煤层的性质和厚度,能精确地确定含水层的性质和厚度。并在煤层对比,岩体物理性质分析,以及煤层顶、底板板压、强度预测等方面都发挥了重要作用。

By the numeral logging technique,the major coalfields in Jinyu County have been prospected and surveyed.The practice shows that the coal-bearing beds have the special response characteristics in the logging.For example,coal beds show such characteristics as lower density,lower gamma value,and high resistance.According to the logging response characteristics,we can confirm the coalbed nature,calculate its thickness;and accurately confirm the aquifer nature and calculate its thickness.The numeral logging technique may play an important role in the stratigraphic correlation of coalbeds,analysis of physical properties of rockbody,and predict the roof-floor pressure and intensity.