FARA System
Simple solution for complicated geological problems
The FARA is a complete independent system, from the beginning to the end created by a permanent team of developers. Over the long years of application of the system, each of its unit
has been repeatedly tested and optimized to increase reliability and productivity.
The complex has the following main advantages:
•
Obtaining additional parameters that helps to confirm or
improve the result
•
Identification of interference associated with the effects of
reflection and refraction of electromagnetic wave
•
Application of algorithms for detecting a useful signal against
a background of high noise level
Registration of signal phase parameters
In addition to amplitude, the FARA system registers the phase of the signal,
which opens the following possibilities:
Registration of up to four frequencies simultaneously
The FARA system makes it possible to record signals at several operating frequencies simultaneously. The system uses two sets of frequencies, wich values are given in the following
table:
Low-frequency set
|
156.25 kHz
|
312.5 kHz
|
625 kHz
|
1250 kHz
|
High-frequency set
|
312.5 kHz
|
625 kHz
|
1250 kHz
|
2500 kHz
|
The registration of several frequencies gives the following advantages:
•
Increasing the reliability of the result due to the presence of several independent images for the same section
•
Ability to display the internal structure of the zones of increased conductivity
The image shows an example of the results of processing field data with the FARA system in the case of high-frequency set.
The results for high frequencies give information about the zone in the central part of the section, while the result for the lowest frequency of 312.5 kHz helps to identify the most
conductive part of this zone.
Measurement during movement
The specificity of the measurements of the radio imaging method makes special
demands on the FARA system for achieving sufficient performance and, as a
consequence, the economic efficiency of the work.
One of the features of the system, which helps to keep the profitability of the
project, is the possibility of measuring during the motion of the receiver along the
borehole.
Together with the unique high-efficiency lifting-lowering system, this feature helps
to reduce the time of data collection for one cross-hole section to 1-2 working
days.
