Five factors determining the accuracy of different geophysical methods to find water and well
When drilling a well to find water, if you use a water detector, you must consider the problem. Is the accuracy high?
The accuracy of any type of water detector should be based on the principle method, instrument performance, detection accuracy,
The detection method and the application of several aspects are used for comprehensive evaluation.
First, the principle and method of geophysical instrument determine the accuracy of its water and well
At present, the most long-time users are the electrical instruments of the artificial field source time domain (including resistivity method).
Instrument, high-density resistivity method, excitation polarization method), because it is limited by the depth of the earth feeding, the geographical environment of the cable, the high-resistance and low-resistance of the underground, and so on, combined with the labor and long time The well location is selected only by the sounding data of several points detected in one day. It can only be speculated whether there is a fault structure, the depth of the aquifer, and the location of the detected points, but for the underground faults and fissures. The location and orientation of the structure, the distribution of the aquifer, etc. are not known. Just like a scorpion touching an elephant, just touching a few points, it is hard to imagine the appearance of an elephant.
Second, the performance indicators of geophysical instrument hardware determine the accuracy of picking up underground lithology information.
Although the principles and implementation methods of many geophysical methods are different, the purpose is to pick up as much as possible.
Take useful information about underground lithology. First, the probe of the primary pick-up signal is sensitive, and it can pick up the weak electromagnetic signal of the microvolt level. Second, the amplification factor and linearity of the signal are h
