Investigation of a Problematic Well to Restore Production

This paper describes a series of investigations carried out in an ESP lifted well (below bubble point production) that experienced a cluster of unexpected problems resulting in loss of production, and how the investigations restored production. The problems among others included apparent severe productivity drop coupled with downhole temperature rise, and the investigations eventually led to the discovery of asphaltene that has not been found in the field before. Analysis of all the problems and investigations including lessons learnt are shared in detail.