A field case is presented for an offshore Louisiana oil well on which severe formation damage was identified, evaluated, and successfully treated. The emphasis of the paper is directed towards the techniques employed to identify the presence of the formation damage, evaluate its possible sources, and formulate an acid system which would effectively treat the formation damage.

A comprehensive study of transient pressure test data, nodal1  analysis curves, and production logs was performed to identify the presence of formation damage. After the existence of the formation damage was confirmed, extensive sidewall core studies were undertaken in an attempt to isolate possible causes of the damage. The results of these studies provided information which was used to formulate an acid system which would effectively remove the formation damage from the affected well.

In conclusion, post treatment transient pressure test results and nodal analysis plots are presented to illustrate the success of the acid stimulation performed on the well.

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