The leading provider of geophysical logging services • Founded 1946
Halt guesswork with USAT—
Uranium Spectral Analysis Tool
USAT is our new logging service that directly measures
uranium in disequilibrium conditions. USAT employs a
High-Purity Germanium detector that measures
Protactinium 234, the second daughter element after
Uranium 238. USAT ignores the high-volume gamma
rays of Bismuth 214, Lead 214, and Radium 226 isotopes. Direct counts mean no guesswork, fewer worries.
• This new service is especially useful on the
coastal plains of South Texas, Australia,
newer formations, or wherever formation
porosity or water migration problems exist.
• USAT requires no corrections for shale or
porosity.
• Adjustments for borehole effects are minimal
for USAT.
USAT is better than gross gamma tools because
• Gross gamma tools measure total gamma radiation.
They can’t tell if that gamma radiation really stems
from the intensely radioactive isotopes of Bismuth,
Lead, and Radium left behind by a roll-front (below).
• You no longer need to do complex estimations,
calculations, and refitting data. USAT bypasses uranium disequilibrium problems via direct measurements.
and other less
soluble radioactive
isotopes
USAT is more effective than core analysis
• USAT samples roughly 30 cm (about 1 ft)
into the formation around the tool. Core
analysis only supplies data on one core width.
• Its logs detect and outline directional trends.
• USAT is not fooled by washouts in highporosity sands. Its operation is not affected
by varying porosity.
• Avoids the problems of missing sections
and mislabeled cores.
• This logging tool also is highly cost effective.
Bringing the unknown to the surface every day
Gross Gamma vs. USAT vs. Core Analysis
In areas of uranium disequillibrium, gross
gamma logs (below, left) can be very misleading
when compared with USAT logs (below, center)
and core analyses (below, right).
Note:
Missing core.
Note:
Missing core.
USAT offers these advantages
• Its high-resolution germanium tool contains a
compact cryogenic unit for unlimited operation
time without loss of resolution.
• Compact six-foot-long, 3.5-inch-diameter size
enables USAT to log small-diameter holes.
• Also able to very accurately measure Potassium
and Thorium levels.
• Recalibration is accomplished with a very
low-power, lab-style source. USAT does NOT
need a calibration pit.
• No neutron source is involved! This means
no worries about radiation licensing or
safety/liability/training and regulations.
For all these reasons, call Century Wireline today
to put USAT to work for you.
Century is an engineering-driven, engineer-managed,
family-owned company based in Tulsa, Oklahoma. We
thrive by partnering with entrepreneur-inventors and providing you with reliable leading-edge products and services.
Our new headquarters offers 50,000-square-feet of modern
training, manufacturing, and office space to keep up with
a growing demand for Century Geophysical products and
Century Wireline services.
Century Wireline Services
1223 S. 71st East Ave., Tulsa, OK 74112
Phone 918-838-9811, Fax 918-838-1532
www.century-geo.com
[email protected]