This paper aims to show the behavior of a 66° deviated well completed with Inflow Control Devices (ICD) after 5 years of production, making a comparison with two analogous wells that have a standard Casing and Perforated completion (C&P). At that time, this type of installation (2011) was the first case in Latin-America. The study is complemented with the performance of two ICD installed in parallel with two horizontal wells.

The analysis describes the ICDs completion for a deviated well, the reasons why the well was completed in this manner and the production results obtained for three wells (1 ICD and 2 C&P) using elapsed time comparisons. The analysis considered the historical Water Cut (WC), the Productivity Index (PI), and Fluid Performance (Oil and Water). Furthermore the use of diagnostic plots to identify the water production mechanism taking into accounts the main facility (water treatment) constraints during the production of the wells.

The deviated ICD completion allowed a Water Cut reduction of at least 10% after 5 years of production, delaying the premature water channeling with an positive reserve impact compared with analogous C&P wells. Moreover this type of completion provides a new way to complete deviated wells, with more than a 45° angle, where the quality of the initial cementation job is doubtful.

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