However, we can put this to work. First, plot the ''P''<sub>98.7%</sub> reserves product at ''P''<sub>98.7%</sub> on the log probability paper and the ''P''<sub>1.3%</sub> reserves product at ''P''<sub>1.3%</sub>. Draw a line connecting them. The median value should lie on or near the line at ''P''<sub>50%</sub>. Now, derive the values associated with ''P''<sub>90%</sub> and ''P''<sub>10%</sub> from the new reserves line and use them to solve for mean reserves using Swanson's Rule. Table 2 illustrates the calculations, and Figure 2 shows the graphical procedure. (As a reality check, you can also determine the mean values for area, net pay, and hydrogen recovery using Swanson's Rule, and then multiply them to yield a mean reserves figure that should approximate the previously calculated mean.) | However, we can put this to work. First, plot the ''P''<sub>98.7%</sub> reserves product at ''P''<sub>98.7%</sub> on the log probability paper and the ''P''<sub>1.3%</sub> reserves product at ''P''<sub>1.3%</sub>. Draw a line connecting them. The median value should lie on or near the line at ''P''<sub>50%</sub>. Now, derive the values associated with ''P''<sub>90%</sub> and ''P''<sub>10%</sub> from the new reserves line and use them to solve for mean reserves using Swanson's Rule. Table 2 illustrates the calculations, and Figure 2 shows the graphical procedure. (As a reality check, you can also determine the mean values for area, net pay, and hydrogen recovery using Swanson's Rule, and then multiply them to yield a mean reserves figure that should approximate the previously calculated mean.) |