Accuracy
The accuracy of sonic logs is rather poor, evident by the fact that regular- and long-spaced log measurements often conflict, and this should be taken into account when there are disagreements between seismic data and sonic log data. Other considerations include that the resolution of sonic logs is on a scale of inches whereas seismic reflection data resolution is on the scale of meters, and the two methods use significantly different frequency ranges so travel times will vary due to dispersion.
In order to investigate how the varying size of a borehole has affected a sonic log, the results can be plotted against those of a caliper log.
Read more about this topic: Sonic Logging
Famous quotes containing the word accuracy:
“Such is the never-failing beauty and accuracy of language, the most perfect art in the world; the chisel of a thousand years retouches it.”
—Henry David Thoreau (1817–1862)
“U.S. international and security policy ... has as its primary goal the preservation of what we might call “the Fifth Freedom,” understood crudely but with a fair degree of accuracy as the freedom to rob, to exploit and to dominate, to undertake any course of action to ensure that existing privilege is protected and advanced.”
—Noam Chomsky (b. 1928)
“As for farming, I am convinced that my genius dates from an older era than the agricultural. I would at least strike my spade into the earth with such careless freedom but accuracy as the woodpecker his bill into a tree.”
—Henry David Thoreau (1817–1862)