TGS provides digital mud log data products that contain valuable information for unconventional plays. Standard mud log products include raster images of mud logs with digitized curves for rate of penetration, total gas, and individual gas curves. Additional curves like gamma ray and water cuts can also be included. Separately, lithology and comments data are captured from mud logs and delivered in digital files for customers. TGS works to standardize codes and symbols in mud logs to make the information more readily usable.

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© 2015 TGS-NOPEC Geophysical Company ASA. All rights reserved.
UNCONVENTIONAL PLAYS - UNCONVENTIONAL APPROACH
With the continued activity in Unconventional Plays and the deployment of
lateral drilling techniques where conventional logging is less successful,
the Mud Log is sometimes the only source of relevant down-hole
information available.
As a leading provider of seismic data, digital well log data, well
performance (production) data, directional survey data and other well
related products, TGS is focusing more attention on the incredibly
valuable and often overlooked Mud Log. The Mud Log represents a wealth
of information gathered at the time of drilling and includes data from
the drilling engineer and the well site geologist relating to the rock and
hydrocarbons encountered during the drilling process.
In response to industry demand TGS is introducing a number of digital
products from the rich and under-utilized Mud Log. Valuable information
can be gleaned from these logs by standardizing the codes and symbols
used and applying routine corrections and editing techniques. TGS takes
extra measures to provide this more readily useable information.
Standard Mud Log (Mudlas)
The standard MUDLAS product comprises a raster image of the Mud Log,
in color where available, plus digitized and QC’d curves captured from the
log. Historically these were limited to the ROP, Total Gas and Individual
Gas curves (C1, C2, C3 etc.), however, in response to client requests we have
expanded the specification to include any other data item on the log that can
reasonably be captured as a curve. This includes GR, Shows Data, WOB etc.
which are captured and all output into a single LAS v2.0 file. Not only does
this ensure that you receive everything available from the log but also in a
single file with consistent depth increment and standardized mnemonics.
TGS Mud Logs - US
ANADARKO
APPALACHIAN
ARDMORE
ARKOMA
BLACK
WARRIOR
CHEROKEE
PLATFORM
TX-LA-MS
SALT
FOREST
CITY
FORT
WORTH
ILLINOIS
MARFA
PERMIAN
SAN
JUAN
VALLEY
AND
RIDGE
WILLISTON
GREATER
GREEN RIVER
MONTANA
THRUST
BELT
PALO DURO
PARADOX
UINTA-PICEANCE
MARIETTA
DENVER
POWDER
RIVER
NORTH
PARK
WESTERN
GULF
SAN
JOAQUIN
BASIN
VENTURA BASIN
SANTA
MARIA
BASIN
LOS
ANGELES
BASIN
RATON
BASIN
BIGHORN
MICHIGAN
Content may not reflect National Geographic's current map policy. Sources: National Geographic, Esri, DeLorme, HERE, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, incr
75°80°W85°W90°W95°W100°W105°W110°W115°W0°W
TGS Available Immediate M
TGS Available Standard MuContent may not reflect National Geographic's current map policy. Sources: National
Geographic, Esri, DeLorme, HERE, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN,
GEBCO, NOAA, increment P Corp.
TGS Available Immediate Mud LAS
TGS Available Standard Mud LASContent may not reflect National Geographic's current map policy. Sources: National
Geographic, Esri, DeLorme, HERE, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN,
GEBCO, NOAA, increment P Corp.

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© 2015 TGS-NOPEC Geophysical Company ASA. All rights reserved.
Mud Lithology And Comments (Mudlith)
Following feed-back from our clients TGS will supply both the Mud Lithology
and Comments as a separate product (MUDLITH) upon order. The MUDLITH
will provide both the graphical lithology information and more detailed
description of the cuttings as well as other pertinent information related to
the drilling operation.
Lithology
TGS captures the lithology column from the mud log. Normally each
lithology type is represented by a curve expressed as a percentage of the
total, however, in some cases the lithology is expressed graphically as
individual beds. In either case these data can be digitized and delivered as
an LAS v2.0 file.
Comments
TGS will also capture all the cuttings descriptions, remarks and other
comments as written on the mud log. Each comment is keyed to a discrete
depth and output as a LAS v2.0 file.
~ A Depth ROP GRMUD MSE TGAS C-1 C-2 C-3 IC4
8782.000 89.9123 91.9831 8333.3333 101.2028 22147.0790 18.7797 10.7951 18.6453
8782.500 93.4211 95.1891 8333.3333 102.4475 22092.8149 18.6453 11.5268 18.4678
8783.000 93.4211 101.7617 8939.3939 103.6922 22038.6838 18.6453 11.7302 17.9402
8783.500 93.4211 108.2237 9744.8166 104.9369 21984.6853 18.6453 11.9480 17.4081
8784.000 93.4211 112.8289 10087.7193 106.1816 21930.8191 18.6453 12.1008 16.9077
8784.500 91.6667 114.3174 10087.7193 107.4263 21877.0849 18.6453 12.2040 17.4618
LAS v2.0 - MUDLAS file
~ A Depth CLST SLST SNST HALT
8819.000 60.0000 20.0000 20.0000 -999.2500
8819.500 60.0000 20.0000 20.0000 -999.2500
8820.000 40.0000 35.0000 25.0000 -999.2500
8820.000 40.0000 35.0000 25.0000 -999.2500
8821.000 40.0000 35.0000 25.0000 -999.2500
8821.000 40.0000 35.0000 25.0000 -999.2500
~ A Depth “LITH DESC & RMKS”
8778.5,
“Survey @ 8778MD 8777.82TVD
Inc: 0.66 Azi: 167.82”
8805.5, “Increase MW to 11.6PPG”
8820.5,
“WOB : 2-8K lbs
RPM : 90
Flow : 1400gpm
SPP : 4300psi
TRQ : 4-9K ft.lbs”
8822.0,
“Sandstone : Light to dark gray, mod
hard, fine to very fine grain, subang to
subround, mod sorted, calc”
US
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Email: info@tgs.com
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