analysis of cores and cuttings starts with the observation and
description of the geological samples taken during well drilling.
Rock type, color, hardness, characteristics of materials filling
fractures (cores only), degree and condition of alteration etc.,
are the main items to describe. To make a more precise description
of the type of rocks, thin sections of cores and cuttings are
prepared and subject to microscope observation. Following, the
geologic column (Fig.1-1) of the wells under study are prepared
to disclose the rock type and stratigraphy (Fig.1-2) around the
West JEC we are careful in pursuing the exact degree of geological
detailing to avoid unnecessary work and acquisition of information.
Precisely, the description of the well geology is completed
with the least number of formations that clearly identify the
rock type or age. Also, we are careful to give priority to the
determination of boundaries between geological formations through
the comparing of geologic formations and geological boundaries
in order to improve the disclosure of faults (Fig.1-3).