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黑龙江省宝清县朝阳区赋存的新第三纪褐煤,由于形成时间短,煤层、岩石强度弱,物性差异较小,在勘探工作中存在地层界面划分困难和煤层厚度、结构变化难以控制的问题。本文主要介绍数字测井曲线在黑龙江省宝清县朝阳地区褐煤勘探中的有效应用。依据本区地层的岩石地球物理特征在不同测井曲线中的反映,综合解决了本区的地层分界和煤层中夹石的划分问题。利用人工伽玛曲线及其组合特征,有效地确定第四系和新第三系中新统二者的地层界限,解决了地层划分问题。利用人工伽玛曲线和电性曲线的组合特征,解决本区褐煤中夹石的划分问题,进而解决了煤层结构和分层对比问题。同时说明,钻孔测井曲线反映的物性规律,实际上是地层解释的一种形式,深入研究这些能代表岩、煤层物性特征的测井曲线,能够解决许多实际地质问题。
The Neogene tertiary lignite hosted in Chaoyang District, Baoqing County, Heilongjiang Province, due to the short formation time, weak strength of coal seam and rock and little difference in physical properties, is difficult to control the stratigraphic interface and the thickness of coal seam in the exploration work. problem. This paper mainly introduces the effective application of digital log in brown coal exploration in Chaoyang area, Baoqing County, Heilongjiang Province. According to the reflection of rock geophysical characteristics of different strata in different logging curves, the stratigraphic boundaries in this area and the classification of gravel in coal seam are comprehensively solved. Using artificial gamma curves and their combination features, the stratigraphic boundaries between the Neogene and the Neogene in the Quaternary and Neogene can be effectively identified and the stratigraphic division problem solved. The combination of artificial Gamma curve and electric curve is used to solve the problem of grading limestone in the lignite in this area, so as to solve the problem of coal seam structure and stratification. At the same time, the physical laws reflected by the borehole logging curves are actually a form of formation interpretation. Deeply studying these well logging curves that can represent the physical characteristics of rocks and coal seams can solve many practical geological problems.