Instrument for soil surface analysis and use for analyzing the wall of a well in particular an oil well

摘要

The present invention relates to analysis tools for analyzing the ground 1, from a surface 2 thereof, by means of a sonde 3 having a given analysis lobe 4 and a resolution time T. The tool of the invention is essentially characterized by the fact that it comprises a drive head 10 driven to move in continuous translation at a speed V relative to the surface 2 and along a direction 11 parallel to the surface 2, a skid 12, means 13 for associating the sonde 3 and the skid 12 so that the sonde can analyze the rocks contained in its lobe 4, and means 14 for coupling together the drive head 10 and the skid 12 so that the two elements can be displaced relative to each other along the direction 11 over a distance D. The tool of the invention finds a particularly advantageous application in analyzing oil-bearing rocks surrounding the wall 30 of an oil well 31, in order to determine both the distribution of the porosity of the rocks, and their associated permeability.