A method of obtaining a developed two-dimensional image of the wall of a borehole

摘要

The invention relates to a method of obtaining a developed two-dimensional image of the wall of a borehole. The method comprises the steps consisting in: measuring (1) a primary physical magnitude in said borehole as a function both of depth and of azimuth; measuring (2) a secondary physical magnitude in said borehole as a function of depth; establishing (13) a relationship (f) between said primary physical magnitude and said secondary physical magnitude; and deducing (14) from said relationship values for said secondary physical magnitude as a function both of depth and of azimuth, which method makes it possible to reconstruct a two-dimensional image developed over the wall of a borehole concerning a secondary physical magnitude which is measured in said borehole as a function of depth only. The invention is particularly applicable to density imaging. <IMAGE>