In the last decade, evaluations, discussions, workshops, and sharing of experiences have helped increase the number of intelligent well system (IWS) solutions being installed around the world. The intelligent wells offer many advantages over conventional completions. These primarily range from accelerated production, increased recovery, reduced or eliminated intervention, and improved reservoir performance. A second set of factors that need to be considered range from reliability of system, overall complexity, contingency operations, and economics.

Instead of a large number of IWS being installed, many questions remain on the performance of these completions. Some of the concerns are lower return than expected/predicted, risk of valve failure affecting well integrity and uncertainty as to the most effective future operational practices.

This work reviews several typical intelligent well systems (IWS) completed, including a gas producer, oil producer, auto-gas lift oil producer, multilateral IWS producer, and horizontal openhole multi-isolation producer. For each case, the wellbore modelling, completion design, choking operation strategies, and estimated performance will be introduced. In conclusion, this paper will show how modelling technologies were developed to derive the IWS well and equipment design. It will cover lessons learned through our experience in intelligent well systems, including flow modelling, erosion analysis, tool selection, and crossover control, and how we expect the future movement of this technology to evolve.

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