This paper describes experience gained through the field pilot exploitation of completion systems designed for simultaneous- separate exploitation (SSE) of multihorizon wells in conditions of South License Area (SLA) of Priobskoye oil field. Possibility of particular formation parameters monitoring and control is the main benefit of such systems.

Overview of completion systems for SSE, ways and technologies used for control of multihorizon wells, experience of such systems application and opportunity for future application are also discussed in this work.

Two main points are considered: Simultaneous Separate Production (ОР Д- Russian abbreviation) for production monitoring and control of multihorizon wells and Simultaneous Separate Injection (OP3 - Russian abbreviation) completion system for water injection control in multihorizon injection wells.

A special attention was paid to the long term monitoring of each penetrated formation on different flow regimes. The monitoring was conducted with downhole gauges (flow rate, temperature and humidity). Opportunity of such monitoring is one of the most important SSE advantages.

Described technologies are part of the field intellectualization project. Purpose of this project is identification of the most effective system which enables control and surveillance of multihorizon wells. As a result, the unified system for the exploitation parameters control and monitoring, based on the observation wells network will be created.

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