Glossary of Drilling Report Abbreviations

Glossary of Drilling Report Abbreviations
The following letter abbreviations are commonly found in drilling reports.
ABD, ABND Abandoned
BFPH Barrels of fluid per hour
BHA Bottomhole assembly: includes the bit, stabilizers, drill
collars, and other tools used below the drillpipe
BHP Bottomhole pressure; usually measured with a pressure
bomb on a wireline
BLD Bailed; refers to the practice of removing debris from the
hole with a cylindrical container on a wireline
BO Barrels of oil
BOP Blowout preventer(s)
BOPD Barrels of oil per day
BPH Barrels per hour
BPD,B/D Barrels per day
BPV Backpressure valve; a valve that allows fluid to flow
through it in only one direction and therefore will
maintain pressure (backpressure) on the downstream side
BU Bottoms up; when circulation has displaced the mud from the bottom of the hole to the surface
BW Barrels of water
BWPD Barrels of water per day
BWPH Barrels of water per hour
CBL Cement bond log; an acoustic device for determining the condition of the bond between cement and hole, and
cement and casing.
CFG Cubic feet of gas
CFGPD Cubic feet of gas per day
CHK Choke; a restriction in a flowline or system, usually
referring to a production choke during a test or to the
choke in the well control system
CIRC Circulate
CMT Cement
CNL Compensated neutron log; a radioactivity log for
measuring porosity
COMP Completed
CP Casing pressure; pressure on the annulus between tubing
and casing: this is measured at the surface
CRD Cored
CSG Casing
DC Drill collar
DF Drill floor or derrick floor
DIL Dual induction laterolog; an electrical log for measuring
resistivity
DP Drillpipe
DRLG Drilling
DST Drillstem test
FDC Compensated formation density log; a log that uses
radioactivity to measure porosity
FP Flowing pressure; usually refers to flowing tubing pressure
FTP Flowing tubing pressure; pressure measured at the
Christmas tree, while the well is flowing
GCM Gas cut mud; mud containing quantities of gas from
subsurface formations
GIH Go in hole or going in hole; usually relating to the
drillstring, a casing string,or a wireline device that is
being lowered into the hole
GL Ground level
GOR Gas-oil ratio; ratio of gas to oil production during a test
(SCF/bbl or m3/m3)
GR Gamma ray log; a radioactivity log indicating lithology
HGR Hanger; a piece of equipment used for hanging casing or
tubing at the surface
IES Induction electrical survey log; an electrical log for
measuring resistivity
IP Initial production; usually describing an initial production
test
ISF Induction spherically focused log; an elec trical log for
measuring resistivity
JTS Joints; as in joints of drillpipe or tubing
KB Kelly bushing
KBE Kelly bushing elevation
KO Kicked off; deviated
KOP Kick-off point; the depth at which a direc tional hole is
deviated from vertical
L/D Lay down; as in “lay down drillpipe,” mean ing that the
equipment is placed horizontally on a pipe rack
L/S Long string; relating to the longest of two or more strings
of tubing in a well with a multiple completion; the longest
string of casing
LCM Lost circulation material; material added to the drilling
mud to correct lost circulation by plugging off fractures in
the rock
LOC Location; wellsite
LSE Lease; refers to the property on which the well is being
drilled
M/U Make up; to assemble parts to form a com plete unit; to
screw together; to mix or blend
MCF Thousand cubic feet of gas
MIR Moving in rig
MIRT Moving in rotary tools (see MIR)
MOR Moving out rig
MW Mud weight; the density of the drilling fluid, usually given
in pounds per gallon
N/D Nipple down; the reverse of nipple up (N/U)
N/U Nipple up; to bolt together valves or fittings, as in “nipple
up BOP stack”
OCM Oil cut mud; mud containing quantities of oil from
subsurface formations
OH Openhole: interval of hole without casing
P/U Pick up; as in “pick up drillpipe,” meaning that the pipe is
picked up and assembled from a horizontal position,
rather than having been stacked vertically
P&A Plug and abandon; to plug the well with cement and
remove surface equipment
PBTD Plug back total depth: the depth of a well after it has been
drilled and then partially plugged back to a shallower
depth
PERF Perforate
PKR Packer: the anchoring and sealing device that blocks off
the annular space between tubing and casing
PL Pipeline
POOH Pull out of hole; retrieve drillstring, tubing string, or
wireline equipment from the hole
POP Putting on pump: installing a pumping unit on a well
RDRT Rigging down rotary tools
REC Recover: usually pertains to an item lost or left in the hole
RFT Repeat formation tester; electric wireline device for taking
samples of formation fluids and pressures from multiple
points in the hole
RIH Running in hole or ran in hole, see GlH
RMG Reaming: enlarging a previously drilled hole
RTTS Retrievable test treat squeeze packer: a retrievable packer
designed for use in performing operations in the hole, but
not usually left in the well as part of the permanent
completion equipment
R/U Rig up; assemble and prepare for action; relates to the
drilling rig itself or any other equipment
S/S Short string; relating to the shortest of two or more strings
of tubing in a well with a multiple completion
SD,SS Sandstone
SDO Shut down waiting on orders: waiting for instructions
from management before proceeding with any activity
SG Show of gas: gas in mud or cuttings
SI Shut in
SIBHP Shut in bottomhole pressure: bottomhole pressure
measured after the well has been shut in for a significant
period of time, usually 24 to 48 hrs or more
SICP Shut-in casing pressure: casing pressure measured when
the well is shut in
SIDPP Shut-in drillpipe pressure; drillpipe pressure measured at
the surface with well shut in, usually referred to during
kick-killing procedures
SIP Shut-in pressure: any shut-in rather than flowing pressure
SITP Shut-in tubing pressure
SLM Steel line measurement; measured with a steel measuring
tape
SP Self potential log: an electrical log for indi cating
lithology
SPD Spudded; began drilling first part of hole, often with a
temporary “spudding rig”
SQ, SQU Squeeze: as in “cement squeeze,” where casing is
selectively perforated and cement pumped into the
perforations
STDS Stands: as in “stands of pipe,” meaning two or three joint
sections stacked in the derrick
SUR, SURV Survey: usually refers to a magnetic survey done to
determine position of hole relative to the surface location
SW Saltwater
SWBD Swabbed: refers to the suction of fluids into the well,
purposefully or inadvertently
SX Sacks; as in sacks of cement; one sack of cement produces
about 1.2 ft3 (.034 m3) of cement when mixed with water
TBG Tubing
TD Total depth
TIH Trip in hole: to lower into the hole, same as “go in hole”
TOOH Trip out of hole: opposite of TIH
TOF Top of fish: relating to the depth of the uppermost part of
a section of pipe lost in the hole
TP Tubing pressure
VIS Viscosity: usually refers to mud viscosity and is reported
inunits of “seconds”; obtained from a Marsh funnel test
W/C Water cushion: water placed in drillpipe during a DST to
lessen pressure differential between formation and
drillpipe
WC Wildcat: well drilled in totally unexplored territory
WIH Went in hole; past form of GIH or TIH
WL, WIL Wireline
WLM Wireline measurement; as opposed to a tubing or drillpipe
measurement of hole depth
WO/O Waiting on orders: waiting for instructions from
management
WOC Waiting on cement: time spent waiting for cement to set
WOW Waiting on weather: time spent waiting for weather
conditions to permit operations to continue

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