Appendix 5: Abbreviations and Acronyms

AHD		Alonghole (sometimes used in place of measured depth)
AI		Acoustic impedance
API		American Petroleum Institute (also units used for gamma ray)
AVO		Amplitude versus offset (of seismic traces)
B/D		Barrels per day
B _g		Gas volumetric factor (in scf under standard conditions per scf in reservoir)
BHA		Bottomhole [drilling] assembly
BHT		Bottomhole temperature
BOE		Barrel of oil equivalent
BOP		Blowout Preventer
bopd		Barrels of oil per day
B _Qv		The product of B, the equivalent counter-ion conductance, and Qv, the cation exchange capacity per unit pore volume.
BS		Bit size
BU		Buildup
BV		Bulk volume
BVI		Bulk volume of irreducible water
CAL		Caliper
CBL		Cement bond log
CCL		Casing collar locator
CEC		Cation exchange capacity
CHP		Casing head pressure
COI		Cost of information
CPI		Computer processed interpretation
DD		Driller's depth
DF		Derrick floor
DHI		Direct hydrocarbon indicator
DOP		Dropoff point
DT		Delta time (inverse of compressional velocity as measured by sonic tool)
DTS		Delta time shear
Ec		Eckert number
EHC		Equivalent hydraulic conductivity
EI		Elastic impedance
E _k		Kinetic energy
EOR		Enhanced oil recovery
ESP		Electric submersible pump
FBU		Formation buildup
FFI		Formation fluid index
FOL		Free oil level
FPI		Free point indicator
FRF		Formation resistivity factor
FSI		Formation strength indicator
FWL		Free water level

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