From Wikipedia, the free encyclopedia Sonic logging
Sonic logging
Well logging Quantitatively, the sonic log is used to evaluate
porosity in liquid filled pores. The sonic tool is only ca-
Gamma ray logging pable of measuring travel time. Many relationships be-
Spontaneous potential logging tween travel time and porosity have been proposed, the
Resistivity logging most commonly accepted is the Wyllie time average
Density logging equation. The equation basically holds that the total trav-
Sonic logging
el time recorded on the log is the sum of the time the son-
Caliper logging
Mud logging ic wave spends traveling the solid part of the rock, called
LWD/MWD the rock matrix and the time spent traveling through the
fluids in the pores.
Sonic logging shows a formation’s interval transit time,
designated Dt. It is a measure of a formation’s capacity to
transmit sound waves. Geologically, this capacity varies
Use in mineral exploration
with lithology and rock textures, notably porosity. Sonic logs are also used in mineral exploration, especially
exploration for iron, hydrocarbons and potassium.
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Categories:
• Well logging
• Petroleum
• Petroleum stubs
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