Curve Mnemonic Dictionary

Mnemonics, Software product, STFRAC

Code	STFRAC
Name	Stoneley Fracture
Discipline	Geology
Type	APPLICATION
Description	Fracture Evaluation from borehole Stoneley wave

Related channels

Channel	Description
ADST	Averaged Stoneley Slowness
EVENTD	Event Flag for Downgoing Reflector
EVENTU	Event Flag for Upgoing Reflector
LNERRD	Linear Least Square Fit Error - Downgoing Reflection
LNERRU	Linear Least Square Fit Error - Upgoing Reflection
RCDT	Downgoing Reflection Coefficient (Time Domain)
RCUT	Upgoing Reflection Coefficient (Time Domain)
REFCD	Down-going reflection coefficient channel
REFCU	Up-going reflection coefficient channel
ST_ENVD	Envelope of time domain down-going reflection coefficient
ST_ENVU	Envelope of time domain up-going reflection coefficient
ST_RWD	Frequency domain down-going reflection coefficient
ST_RWU	Frequency domain up-going reflection coefficient
ST_SDD	Down-going Direct wave
ST_SDU	Up-going Direct wave
ST_SRD	Down-going Reflected wave
ST_SRU	Up-going Reflected wave
ST_SRWD	Frequency domain down-going reflection coefficient at only events
ST_SRWU	Frequency domain up-going reflection coefficient at only events

Related parameters

Parameter	Description
DSTL	Direct arrival Stoneley wave packet length
HHTAP	Length of the half hanning taper window in zero-fill
NLAVE	Number of frames for averaging
REFC	Minimum amplitude of time domain reflection coefficient
REFH	Frequency band high for ref coef channels
REFL	Frequency band low for ref coef channels
S2N	Peak-to-noise-floor amplitude ratio for Stoneley spectrum estimates
STQ	Length of the baseline quiet zone used in zero-mean step
THDD	Acceptable deviation of intercept point for reflector locating
THDS	Acceptable deviation of the reflection ray move-out slowness for reflector locating
THLC	Acceptable linear least square error for reflector locating
ZMASK	Minimum separation of two resolvable fractures

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