Changes

==True vertical depth==

==True vertical depth==

<gallery>

<gallery mode=packed heights=200px widths=200px>

file:conversion-of-well-log-data-to-subsurface-stratigraphic-and-structural-information_fig1.png|{{figure number|1}}Surface projection of well course for a nominally vertical well. © Don Clarke, Dept. of OH Properties, City of Long Beach, CA).

file:conversion-of-well-log-data-to-subsurface-stratigraphic-and-structural-information_fig1.png|{{figure number|1}}Surface projection of well course for a nominally vertical well. © Don Clarke, Dept. of OH Properties, City of Long Beach, CA).

file:conversion-of-well-log-data-to-subsurface-stratigraphic-and-structural-information_fig2.png|{{figure number|2}}Well course of two types of deviated wells. True stratigraphic thickness and true vertical thickness of a dipping stratigraphic unit are shown in relation to the measured interval in a well penetrating the unit.

file:conversion-of-well-log-data-to-subsurface-stratigraphic-and-structural-information_fig2.png|{{figure number|2}}Well course of two types of deviated wells. True stratigraphic thickness and true vertical thickness of a dipping stratigraphic unit are shown in relation to the measured interval in a well penetrating the unit.