A neutron probe provides calibrated borehole-compensated
neutron porosity measurements designed for mud filled holes. The neutron probe
is the probe of choice when it comes to quantitative formation fluid studies.
Under the majority of borehole conditions, a single-detector neutron probe is
also available for qualitative porosity logging. This includes through steel or plastic casing
and drill pipes.
Probes such as neutron probe are used to identify faults and
folding, along with locating issues and characteristics within certain
fractures that allow the proceeding to complete further investigation. These
imaging probes allow each electrode to emit its own current that is focussed
into a narrow beam and returned to a remote part of the tool body. This current
is the digitalised in each pad, before being transmitted to the surface by a
separate telemetry module. This makes use of propriety high speed communication
systems and may be run through 4 or 7 core cables, making it compatible with
standard oilfield systems, running Warrior software.
Micro-resistivity,
borehole diameter, drift and inclination are among some of the measurements
that can be registered during the operation of this new tool. There are a
number of different probes on the market, suited to different activities. The
neutron probe will operate in a water filled open or cased borehole, whereas
the slim micro-resistivity image probe works in water based mud.
These probes have been developed thanks to the growth within
the industry, allowing technological advancement to influence the introduction
and use of probes. Wireline logging is
also experiencing growth and development and expects to have made rapid
increases by 2020. The increase in exploration, production activities and
expenditure by oil and gas companies has allowed the industry to grow.
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