In the context of high hydrocarbon price volatility on the global market and worsening resource structure an increasingly greater attention is paid to the search of effective and economically sound tools for production and exploitation process management and control, including in horizontal and directional wells.

Traditional approaches to horizontal well surveys by PLT using CT come with low industrial safety of work performance, high cost and, therefore, limitation in wide use. One of the alternative approaches is to use well marker monitoring system enabling to obtain unlimited information about inflow profile and composition along a horizontal well without interventions on a long-term basis.

This paper describes an approach of placing the marker monitoring systems as a part of completions and carrying out 3-phase monitoring for oil, water and gas, including off-shore project conditions.

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