Tag Archives | Geophysical Techniques

Geophysical Techniques inside a Borehole | Geography

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 current (I) is passed between [...]

By Madhulika|2018-03-31T08:10:44+00:00March 31, 2018|Geophysical Investigations|Comments Off

Classification of Geophysical Techniques | Hydrogeology

Based on the property on which the method depends the geophysical techniques can be broadly classified as: 1. Gravity Prospecting 2. Magnetic Prospecting 3. Electrical and Electro-Magnetic Prospecting 4. Seismic Prospecting 5. Well Logging Techniques. 1. Gravity Prospecting Method: The gravity method of geophysical prospecting is based on the fact that the gravitational attraction of sub-surface bodies directly up on [...]

By Parul G|2017-03-04T09:37:53+00:00March 4, 2017|Hydrogeology|Comments Off