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地球物理测井是查明和评价非金属矿的主要手段之一。在实际工作中,对于一些非金属矿(如重晶石、石膏、磷、硫等),地球物理测井有可能配合其他工作手段解决一系列地质问题。本文拟对河南省陕县重晶石矿床的测井方法如视电阻率(ps),自然电位(Vz)、自然伽玛(HG)、及伽玛-伽玛(HGG)等测井曲线异常特征及应用效果加以阐述。重晶石矿的密度、比重和电阻率都大于围岩。强硫化的重晶石具有良导性和高的激发极化特性,重晶石无磁性和放射性。在勘探阶段利用上述地球物理测井方法用以验证钻孔岩性剖面,查明矿化带及矿层的赋存深度、厚度以及解决钻孔技术问题。
Geophysical logging is one of the main means to identify and evaluate non-metallic minerals. In practical work, some non-metallic ores (such as barite, gypsum, phosphorus, sulfur, etc.), geophysical logging may cooperate with other means of work to solve a series of geological problems. In this paper, the logging methods such as apparent resistivity (ps), natural potential (Vz), natural gamma ray (HG) and gamma-gamma (HGG) Characteristics and application effects to be elaborated. Barite density, specific gravity and resistivity are greater than the surrounding rock. Strong sulfide barite with good conductivity and high excitation polarization, barite non-magnetic and radioactive. In the exploration phase, the above geophysical well logging method is used to verify the lithology profile of the borehole, and the occurrence depth and thickness of the mineralized zone and the ore layer are ascertained and the technical problems of drilling are solved.