Wall sticking
Washout
Washover
Wash over
Water analysis
Water-base mud
Water block
Water cone
Water cut
Watercutmeter
Water-drive
Watered-out
Water encroachment
Water entry survey
Water flooding
Water loss
Water saturation
Water table
Water wet
Wavelength
Wavelet
Wave train
Wave train display
Wave train log
Weak point
Weight indicator
Well bore
Wellbore storage effect
Well completion
Wellhead
Well log
Well logging cable
Well seismic recording
Well spacing
Wettability
Whipstock
Wiggle trace
Wildcat
Wild well
Winch
Wireline log
Work over