Changes

==A DST plot==

==A DST plot==

[[file:formation-fluid-pressure-and-its-application_fig5-14.png|thumb|{{figure number|2}}See text for explanation.]]

[[file:formation-fluid-pressure-and-its-application_fig5-14.png|thumb|{{figure number|2}}DST plot showing the various pressures recorded during the different DST periods.]]

During a DST, pressure is continuously recorded against time. The record begins as the DST tool is lowered down the borehole and ends when the tool returns to the surface. [[:file:formation-fluid-pressure-and-its-application_fig5-14.png|Figure 1]] is a DST plot, showing the various pressures recorded during the different DST periods.

During a DST, pressure is continuously recorded against time. The record begins as the DST tool is lowered down the borehole and ends when the tool returns to the surface. [[:file:formation-fluid-pressure-and-its-application_fig5-14.png|Figure 2]] is a DST plot, showing the various pressures recorded during the different DST periods.

'''Point A''' is the initial hydrostatic pressure (IHP), the pressure exerted by the mud column in the borehole at the depth where the recorder is located.

'''Point A''' is the initial hydrostatic pressure (IHP), the pressure exerted by the mud column in the borehole at the depth where the recorder is located.