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Dynamic Data Analysis – v5.12.01 - © KAPPA 1988-2017

Chapte

r 3 – P ressure Transient Analysis (PTA) -

p108/743

Fig. 3.F.8 – Skin sensitivity

Fig. 3.F.9 – Wellbore storage sensitivity

3.F.6

The final program

A final program is issued and contains all the necessary information to allow the field

personnel to safely carry out the well test and assure that all necessary equipment is available.

Specific responsibility levels and who is accountable for what part of the operation is defined in

the document.

Each phase of the operation is identified and durations of flow and shutin periods are clearly

defined. Usually a flow sequence is defined with one single and constant flowrate, this is

sometime confusing and the field personnel may try to achieve such a constant flowrate by

continuously adjusting the choke. To increase the chances of obtaining a solid analysis from

the data it is however recommended to avoid any choke changes during a single defined

flowing period as long as the flow rates are measured.

Finally the program is just that, a program; proper field supervision is of course indispensable

and adjustments to the plan must be continuous as conditions change.