The map in [[:file:formation-fluid-pressure-and-its-application_fig5-38.png|Figure 1]] shows oil in a hydrodynamic trap (shaded area). No oil could be trapped in the structure, represented by solid contours, without the aid of hydrodynamics. The bold contours with long dashes represent the isopotential of oil (labeled U<sub>0</sub>). To make U<sub>o</sub> contours, follow this procedure. | The map in [[:file:formation-fluid-pressure-and-its-application_fig5-38.png|Figure 1]] shows oil in a hydrodynamic trap (shaded area). No oil could be trapped in the structure, represented by solid contours, without the aid of hydrodynamics. The bold contours with long dashes represent the isopotential of oil (labeled U<sub>0</sub>). To make U<sub>o</sub> contours, follow this procedure. |