Geoscience
Data Library

Glossary of Oil-field Terms



bbl, bbls    barrel, barrels
BOPD         barrels of oil per day
BTU          British thermal units
BW/hr        barrels of water flowing per hour
BWPD         barrels of water per day
cf           cubic feet
cfg          cubic feet of gas
chat         cherty and conglomeratic rock
dst          drill-stem test
fluor        fluorescence
fm           formation
FO           frothy oil
FU           filled up
GC           gas cut
GCM          gas-cut mud
GCO          gas-cut oil
GCSW         gas-cut saltwater
GMCO         gassy mud-cut oil
GOCM         gassy oil-cut mud
GSO          good show of oil
gty          gravity
HC           hydrocarbon
HG           highly gas-cut
HOCM         highly oil-cut mud
MCFGPD       thousand cubic feet of gas per day
MCW          mud-cut water
MSW          muddy saltwater
MW           muddy water
NA           not available
OC           oil-cut
OCM          oil-cut mud
OCSW         oil-cut saltwater
OIH          oil in hole
OS           oil show
OSM          oil-saturated mud
perfs        perforations, perforated
rec          recovered, recovery
SGCM         slightly gas-cut mud
SGCMW        slightly gas-cut muddy water
SGCSW        slightly gas-cut saltwater
SICP         shut-in casing pressure
SMCSW        slightly mud-cut saltwater
SO           show of oil
SOC          slightly oil-cut
SOCM         slightly oil-cut mud
SOCMW        slightly oil-cut muddy water
SOCSW        slightly oil-cut saltwater
SOSM         slightly oil-saturated mud
SOSMW        slightly oil-saturated muddy water
SSO          slight show of oil, small show of oil
SW           saltwater
swbd         swabbed
UV fluor     ultraviolet fluorescence
VSOCM        very slightly oil-cut mud
VSOCSW       very slightly oil-cut saltwater
VSSO         very slight show of oil
WCM          water-cut mud
w/           with

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Updated Oct. 30, 1995
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