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- W2038057292 abstract "1. Abstract Eni is involved in a big project in the Middle East developed with an extensive use of Electrical Submersible Pumps. The installation of Electrical Submersible Pumps (ESPs) is a common solution in case of depleted reservoirs or where there is demand of high pressure from the surface facilities. The downside of ESP completions is that they restrict the access to the wellbore for stimulation and cleanup jobs. The use of a mechanical by-pass (Y-tool) is possible if the production casing/liner is at least 7, and anyway imposes a reduction in the pump size. Moreover, ESPs are also affected by several factors that could lead to definitive failure, like solid plugging or scale depositions. During the field operations, both ESP stuck by plugging and reduction of productivity index were recorded. The possibility to perform stimulation jobs through the pump, to avoid the cost of retrieving the completion, was therefore studied as a possible solution even if no past experiences were found in literature and the feedback from the ESP contractors to consider the stimulation trough ESPs only as last chance before a workover. A dedicated production optimization was created putting together artificial lift and production optimization engineers. The jobs had to be carefully planned and evaluated case by case, considering that the reliability of all elastomeric and electrical elements downhole (protector, cable, and pothead) could be reduced in case of contact with the stimulation fluid. Several different interventions were performed: the first ones were aimed at dissolving possible plugs in the pump, starting from simple water or diesel wash and further evolving to more aggressive acid washes. Extensive lab analyses on the emulsion tendency of the oil lead to attempt also non emulsifier treatments. This paper will present and detail the successful results experienced in the field, especially in terms of production recovery from stuck pumps and PI improvement." @default.
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- W2038057292 date "2014-12-10" @default.
- W2038057292 modified "2023-10-16" @default.
- W2038057292 title "Stimulation Through ESP: An Innovative Solution to Improve Production" @default.
- W2038057292 doi "https://doi.org/10.2523/iptc-18014-ms" @default.
- W2038057292 hasPublicationYear "2014" @default.
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