GGU-SLUGTEST: "Cooper (Ramey/Dougherty/Moench)" menu item

In the program's default setting, the first menu item in the "Type curves" menu is "Cooper". Select the required model here, as shown in the following dialog box. The name of the menu item will be adjusted in the further course of the program, depending on the model selected, e.g. "Type curves/Ramey".

When selecting a model, the well geometry, the aquifer configuration and the data itself should be taken into consideration.

You can select from:

• Cooper (perfect well with wellbore storage in a homogeneous, isotropic, confined aquifer)

• Dougherty (imperfect well with wellbore storage in a homogeneous, isotropic, confined aquifer)

• Ramey (perfect well with wellbore storage and infinite skin in a homogeneous, isotropic, confined aquifer)

• Moench (perfect well with wellbore storage and finite skin in a homogeneous, isotropic, confined aquifer)

In addition, you can choose to have the test evaluated by means of normal type curves or the derivative of the type curves.

The evaluation by means of the type curve derivative makes sense if you want to perform a "hand fit".

If the type curves are represented as derivatives, they are generally easier to differentiate from one another than the normal representation. This helps when selecting by hand the best-fitting derivative and thus the type curve.

The name of the following menu item is adjusted according to the selected test evaluation, e.g. "Type curves/Cooper preferences".

Confirm the model selection and test evaluation using "OK". If you have already loaded a dataset, the standard type curves are presented on the output sheet corresponding to the evaluation models and your data curve.