GGU-SLUGTEST: Evaluation model after RAMEY
If you selected the "RAMEY" model for your fit and you activate the "Type curves/Permeability" menu item, a window opens with the heading "Determine storage coefficient or skin" and showing the type curve parameters and the storage coefficient. Furthermore, a value for the skin is proposed.
Because the RAMEY method can calculate either only the storage coefficient or only the skin, one of the two variables must already be known in order to calculate the other. You therefore have the option of having either the storage coefficient calculated for a user-defined skin value or having the skin calculated for an estimated storage coefficient. When you have done this a small window opens displaying the values.
In addition, the hydraulically effective well radius is calculated from the skin and displayed here. If you confirm the values with "OK" a new window opens with the heading "Type curves after Ramey", showing all evaluation results.
These results consist of the permeability kf, the initial height H0, the transmissivity, the storage coefficient, the skin and the effective well radius. If desired, you can use this result as the result text in the lower right box of the output sheet .