Changes

==Step 4: Convert time to depth==

==Step 4: Convert time to depth==

[[file:interpreting-seismic-data_fig12-14.png|left|thumb|{{figure number|3}}. Copyright: Liner, 1999; courtesy PennWell.]]

[[file:interpreting-seismic-data_fig12-14.png|left|thumb|{{figure number|3}}Process and result for the Glenn Pool Wilcox horizon. Copyright: Liner, 1999; courtesy PennWell.]]

Convert time to depth by multiplying the time structure map and the depth conversion velocity map, i.e.,

Convert time to depth by multiplying the time structure map and the depth conversion velocity map, i.e.,

:<math>z(x,y) = \frac{\upsilon(x,y)*t(x,y)}{2}</math>

:<math>z(x,y) = \frac{\upsilon(x,y)*t(x,y)}{2}</math>

The factor of one-half is necessary because the times are two-way vertical times and we only want the one-way depth. [[:file:interpreting-seismic-data_fig12-14.png|Figure 3]] shows the process and result for the Glenn Pool Wilcox horizon.

The factor of one-half is necessary because the times are two-way vertical times and we only want the one-way depth. [[:file:interpreting-seismic-data_fig12-14.png|Figure 3]] shows the process and result for the Glenn Pool Wilcox horizon.