Sonic logging tool
Drilling Fluids & Logging
A Sonic tool measures the travel time (Delta-T) of sound waves through the formation. It consists of a transmitter and multiple receivers. The speed of sound depends on the rock type and fluid content (porosity).
It is used to calibrate seismic data (time-to-depth conversion) and to calculate primary porosity. Advanced dipole sonic tools can also measure mechanical rock properties for geomechanics (stress analysis).
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