Geophysics, in the past few years, has reached a place of vital importance to the scientific development and protection of the world’s precious ground water supply. Geophysical investigations of the buried strata can be made either from the land surface or in a drilled hole in the formation. The surface methods include: 1. Electrical Resistivity […]
Top 3 Surface Methods of Geophysical Investigations | Geology
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Geophysical Techniques inside a Borehole | Geography
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The geophysical techniques inside a drilled hole include: 1. Electric Logging 2. Radioactive Logging 3. Induction Logging 4. Sonic Logging 5. Fluid Logging 6. Down-Hole Photography. Technique # 1. Electric Logging: A four electrode arrangement is commonly employed in measuring resistivity from bore holes similar to the four electrodes used in surface resistivity method. A […]