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Services >Mud Logging
Services >Gas Logging Services |
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Gas
Logging Services |
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Gas detection is the
heart of mud logging. All mud logging units of CNLC
use FID or TCD detectors to detect hydrocarbon gas extracted
from the mud sample flowing in the ditch. Meanwhile,
we use the integrator to automatically calculate total
gas and chromatograph data for display, printing, plotting
and storage.
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The main principle of chromatography
is that after vaporized samples are carried
into the chromatographic column by carrier gas, components
in the samples are distributed repeatedly between the gas
phase and fixed liquid phase according to their different
distribution coefficients in these two phases. The running
speed of these components in the column are different
because the fixed liquid has a different absorbability and
dissolving capacity, hence, they depart from each other
after some column length and reach the detector. After
the signals of ion current resulted by the detector are
amplified, chromatographic peaks of the components will
be shown on the recorder. At the same time, an integrator
or computer can convert peak signals to gas measurement
values (calibration procedure), and save them to the hard disk. |
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The mud log chromatogram may be used to
draw conclusions about fluid type, gas or gravity present
in a reservoir and the producibility of that fluid. Using
different interpretation plots, we can determine the oil and
gas potential productivity of a reservoir formation, such
as PIXLER, Triangular, gas ratio plot, etc. |
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