| 摘要 |
<p>PURPOSE:To enable identification of a difference in directivity between horizontal and vertical structures by displaying an electric probing data by a plurality of kinds of electrode arrays arranged cubically in two drilled holes to indicate abnormality attributed to structures. CONSTITUTION:A positive current electrode 4 is moved along the depth of a drilled hole (or well) 2 with in the hole, a pseudo section display point 15 shifts along the depth thereof (in a left slant way). As a positive potential elec trode 5 is moved along the depth of the drilled hole 3 within the hole, the pseu do section display point 15 shifts along the depth thereof (in a right slant way). In this manner, a specific resistance pseudo section can be prepared in an area centering on an interval between the two drilled holes 2 and 3 where a plurality of kinds of inter-hole cubic electrode arrays are set. Moreover, a broader pseudo section or more pseudo sections can be prepared depending on changes in the depth of the drilled holes 2 and 3.</p> |
