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地下物探是地球物理方法在钻孔和坑道中应用的总称。在钻孔中按其工作方式和探测范围的不同，又可分测井和井中物探两大类。测井的探测范围为几厘米至几十厘米级，主要用来解决井壁地质问题。地质矿产部的测井工作已有卅年历史，目前已能基本满足地质勘探的需要。●在测井仪器装备方面，除原有的JDC—2型（上海地质仪器厂造）和JBC—2型（重庆地质仪器厂造）轻便全自动测井系统外，近年，还由上海地质仪器厂生产了JH—1型综合测井站，使仪器装备实现了车装、配套，小口径化（井下仪直径一般不大于40毫米）。它们适用于煤田、铀矿、水文、金属与非金属矿测井，最大测量井深1000米。
Geophysical prospecting is geophysical methods used in drilling and tunnels in general. In drilling according to their working methods and detection range of different, but also sub-logging and well geophysical two categories. Logging range of detection of a few centimeters to tens of centimeters level, mainly used to solve the borehole geological problems. The logging work of the Ministry of Geology and Minerals has been around for a long time and can basically meet the needs of geological exploration. In addition to the original JDC-2 (Shanghai Geological Instrument Factory) and JBC-2 (Chongqing Geological Instrument Factory) portable automatic logging system, in recent years, Shanghai Geological Instrument Factory production JH-1-type integrated logging stations, equipment and equipment to achieve a car, supporting, small caliber (Downhole diameter is generally not more than 40 mm). They are suitable for coal, uranium, hydrology, metal and non-metallic mineral logging, the maximum measured well depth 1000 meters.