Page 36 - Industrial Plants

Fig. 10 - 3D Resistivity model and structural clip-plane (4°DIP/144° DIPDIR) – Resistivity at various depths

context. In the remaining parts of the model the result
obtained is similar to that seen in the 2D lines. The
values of the electrical resistivity are presented by
volumes in transparency, with perspective views (from
the East and South); in vertical slices (clip-planes), one
of which is aligned with the pipeline, one located 5.0 m
towards the NE and the other 5.0 m towards the SW.
Finally, in order to have a perception of the variation of
the resistivity values within the homogeneous
lithological/electrical horizons, clip plane of a structural
plane was used, with geometry similar to that of the
outcropping Formation (DIP/DIPDIR - 04°/144°), at
various depths. (See Figure 10).

The three geoelectric prospections transversal to the
direction of the pipeline axis (TR04, TR05 and TR06
(See Figure 11)), cover the entire area of the submerged
morphological platform and the valley present in the
north side. The models, always elaborated with the
same boundary conditions used for the longitudinal
models, show a distribution of the resistivity values
similar to those already described, therefore consistent
with a sub-horizontal monoclinal structure of the
lithologies. An electrically relatively higher resistive first
horizon (>10 Ωm) is always observed, laterally affected
by slightly more conductive/fractured bands.

Two particularly low-resistive cores are present in the
Fig. 11 - Electrical resistivity tomography – TR04-TR05-TR06

IndustrIal Plants - May 2022
34